Important change for the implementation of motion input
Now we provide the first and second derivatives. This permits to not have any motion error. Also, many experiments (tomography, ty-scans) are simulated
@ -3,7 +3,7 @@
|
||||
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
|
||||
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
|
||||
<head>
|
||||
<!-- 2019-12-13 ven. 19:06 -->
|
||||
<!-- 2019-12-17 mar. 18:01 -->
|
||||
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
|
||||
<meta name="viewport" content="width=device-width, initial-scale=1" />
|
||||
<title>Tomography Experiment</title>
|
||||
@ -258,16 +258,70 @@ for the JavaScript code in this tag.
|
||||
<h2>Table of Contents</h2>
|
||||
<div id="text-table-of-contents">
|
||||
<ul>
|
||||
<li><a href="#org84a12d1">1. Simscape Model</a></li>
|
||||
<li><a href="#orgcb251b3">2. Tomography Experiment with no disturbances</a></li>
|
||||
<li><a href="#orgcc1bc22">3. With Perturbations</a></li>
|
||||
<li><a href="#org9876dd1">1. Simscape Model</a></li>
|
||||
<li><a href="#orge5e5b16">2. Tomography Experiment with no disturbances</a>
|
||||
<ul>
|
||||
<li><a href="#org5e4ce3d">2.1. Simulation Setup</a></li>
|
||||
<li><a href="#org8ae8a5d">2.2. Analysis</a></li>
|
||||
<li><a href="#orgc99de70">2.3. Conclusion</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
<li><a href="#org236226d">3. Tomography Experiment with included perturbations</a>
|
||||
<ul>
|
||||
<li><a href="#org8aa359d">3.1. Simulation Setup</a></li>
|
||||
<li><a href="#orgd63048b">3.2. Analysis</a></li>
|
||||
<li><a href="#org5328197">3.3. Conclusion</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
<li><a href="#orgbcf3187">4. Tomography when the micro-hexapod is not centered</a>
|
||||
<ul>
|
||||
<li><a href="#orgb8fc603">4.1. Simulation Setup</a></li>
|
||||
<li><a href="#org22f9788">4.2. Analysis</a></li>
|
||||
<li><a href="#orga8287ac">4.3. Conclusion</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
<li><a href="#org9e0e5be">5. Raster Scans with the translation stage</a>
|
||||
<ul>
|
||||
<li><a href="#org0b48fba">5.1. Simulation Setup</a></li>
|
||||
<li><a href="#orge9df7a3">5.2. Analysis</a></li>
|
||||
<li><a href="#orgbdb4d14">5.3. Conclusion</a></li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<div id="outline-container-org84a12d1" class="outline-2">
|
||||
<h2 id="org84a12d1"><span class="section-number-2">1</span> Simscape Model</h2>
|
||||
<p>
|
||||
The goal here is to simulate some scientific experiments with the tuned Simscape model when no control is applied to the nano-hexapod.
|
||||
</p>
|
||||
|
||||
<p>
|
||||
This has several goals:
|
||||
</p>
|
||||
<ul class="org-ul">
|
||||
<li>Validate the model</li>
|
||||
<li>Estimate the expected error motion for the experiments</li>
|
||||
<li>Estimate the stroke that we may need for the nano-hexapod</li>
|
||||
</ul>
|
||||
|
||||
<p>
|
||||
The document in organized as follow:
|
||||
</p>
|
||||
<ul class="org-ul">
|
||||
<li>In section <a href="#orga91d1df">1</a> the Simscape model is initialized</li>
|
||||
<li>In section <a href="#org1018b85">2</a> a tomography experiment is performed where the sample is aligned with the rotation axis. No disturbance is included</li>
|
||||
<li>In section <a href="#org8c019e4">3</a>, the same is done but with disturbance included</li>
|
||||
<li>In section <a href="#org395e7ec">4</a> the micro-hexapod translate the sample such that its center of mass is no longer aligned with the rotation axis. No disturbance is included</li>
|
||||
<li>In section <a href="#orga1dc368">5</a>, scans with the translation stage are simulated with no perturbation included</li>
|
||||
</ul>
|
||||
|
||||
<div id="outline-container-org9876dd1" class="outline-2">
|
||||
<h2 id="org9876dd1"><span class="section-number-2">1</span> Simscape Model</h2>
|
||||
<div class="outline-text-2" id="text-1">
|
||||
<p>
|
||||
<a id="orga91d1df"></a>
|
||||
</p>
|
||||
|
||||
<p>
|
||||
The simulink file to do tomography experiments is <code>sim_nano_station_tomo.slx</code>.
|
||||
</p>
|
||||
@ -277,11 +331,11 @@ The simulink file to do tomography experiments is <code>sim_nano_station_tomo.sl
|
||||
</div>
|
||||
|
||||
<p>
|
||||
We load the shared simulink configuration and we set a small <code>StopTime</code>.
|
||||
We load the shared simulink configuration and we set the <code>StopTime</code>.
|
||||
</p>
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'mat/conf_simscape.mat'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
<span class="org-matlab-simulink-keyword">set_param</span><span class="org-rainbow-delimiters-depth-1">(</span><span class="org-variable-name">conf_simscape</span>, <span class="org-string">'StopTime'</span>, '<span class="org-highlight-numbers-number">10</span><span class="org-type">'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
<span class="org-matlab-simulink-keyword">set_param</span><span class="org-rainbow-delimiters-depth-1">(</span><span class="org-variable-name">conf_simscape</span>, <span class="org-string">'StopTime'</span>, '<span class="org-highlight-numbers-number">5</span><span class="org-type">'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
@ -313,9 +367,231 @@ All stage is set to its zero position except the Spindle which is rotating at 60
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<div id="outline-container-orgcb251b3" class="outline-2">
|
||||
<h2 id="orgcb251b3"><span class="section-number-2">2</span> Tomography Experiment with no disturbances</h2>
|
||||
<div id="outline-container-orge5e5b16" class="outline-2">
|
||||
<h2 id="orge5e5b16"><span class="section-number-2">2</span> Tomography Experiment with no disturbances</h2>
|
||||
<div class="outline-text-2" id="text-2">
|
||||
<p>
|
||||
<a id="org1018b85"></a>
|
||||
</p>
|
||||
</div>
|
||||
<div id="outline-container-org5e4ce3d" class="outline-3">
|
||||
<h3 id="org5e4ce3d"><span class="section-number-3">2.1</span> Simulation Setup</h3>
|
||||
<div class="outline-text-3" id="text-2-1">
|
||||
<p>
|
||||
And we initialize the disturbances to be equal to zero.
|
||||
</p>
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">opts = struct<span class="org-rainbow-delimiters-depth-1">(</span>...
|
||||
<span class="org-string">'Dwx'</span>, <span class="org-constant">false</span>, ...<span class="org-comment"> % Ground Motion - X direction</span>
|
||||
<span class="org-string">'Dwy'</span>, <span class="org-constant">false</span>, ...<span class="org-comment"> % Ground Motion - Y direction</span>
|
||||
<span class="org-string">'Dwz'</span>, <span class="org-constant">false</span>, ...<span class="org-comment"> % Ground Motion - Z direction</span>
|
||||
<span class="org-string">'Fty_x'</span>, <span class="org-constant">false</span>, ...<span class="org-comment"> % Translation Stage - X direction</span>
|
||||
<span class="org-string">'Fty_z'</span>, <span class="org-constant">false</span>, ...<span class="org-comment"> % Translation Stage - Z direction</span>
|
||||
<span class="org-string">'Frz_z'</span>, <span class="org-constant">false</span> ...<span class="org-comment"> % Spindle - Z direction</span>
|
||||
<span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
initDisturbances<span class="org-rainbow-delimiters-depth-1">(</span>opts<span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<p>
|
||||
We simulate the model.
|
||||
</p>
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab"><span class="org-matlab-simulink-keyword">sim</span><span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'sim_nano_station_tomo'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<p>
|
||||
And we save the obtained data.
|
||||
</p>
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">tomo_align_no_dist = struct<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'t'</span>, t, <span class="org-string">'MTr'</span>, MTr<span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
save<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'experiment_tomography/mat/experiment.mat'</span>, <span class="org-string">'tomo_align_no_dist'</span>, <span class="org-string">'-append'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<div id="outline-container-org8ae8a5d" class="outline-3">
|
||||
<h3 id="org8ae8a5d"><span class="section-number-3">2.2</span> Analysis</h3>
|
||||
<div class="outline-text-3" id="text-2-2">
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'experiment_tomography/mat/experiment.mat'</span>, <span class="org-string">'tomo_align_no_dist'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
t = tomo_align_no_dist.t;
|
||||
MTr = tomo_align_no_dist.MTr;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">Edx = squeeze<span class="org-rainbow-delimiters-depth-1">(</span>MTr<span class="org-rainbow-delimiters-depth-2">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">4</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
Edy = squeeze<span class="org-rainbow-delimiters-depth-1">(</span>MTr<span class="org-rainbow-delimiters-depth-2">(</span><span class="org-highlight-numbers-number">2</span>, <span class="org-highlight-numbers-number">4</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
Edz = squeeze<span class="org-rainbow-delimiters-depth-1">(</span>MTr<span class="org-rainbow-delimiters-depth-2">(</span><span class="org-highlight-numbers-number">3</span>, <span class="org-highlight-numbers-number">4</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
<span class="org-comment">% The angles obtained are u-v-w Euler angles (rotations in the moving frame)</span>
|
||||
Ery = atan2<span class="org-rainbow-delimiters-depth-1">(</span> squeeze<span class="org-rainbow-delimiters-depth-2">(</span>MTr<span class="org-rainbow-delimiters-depth-3">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">3</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span>, squeeze<span class="org-rainbow-delimiters-depth-2">(</span>sqrt<span class="org-rainbow-delimiters-depth-3">(</span>MTr<span class="org-rainbow-delimiters-depth-4">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">1</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-4">)</span><span class="org-type">.^</span><span class="org-highlight-numbers-number">2</span> <span class="org-type">+</span> MTr<span class="org-rainbow-delimiters-depth-4">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">2</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-4">)</span><span class="org-type">.^</span><span class="org-highlight-numbers-number">2</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
Erx = atan2<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-type">-</span>squeeze<span class="org-rainbow-delimiters-depth-2">(</span>MTr<span class="org-rainbow-delimiters-depth-3">(</span><span class="org-highlight-numbers-number">2</span>, <span class="org-highlight-numbers-number">3</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-type">./</span>cos<span class="org-rainbow-delimiters-depth-2">(</span>Ery<span class="org-rainbow-delimiters-depth-2">)</span>, squeeze<span class="org-rainbow-delimiters-depth-2">(</span>MTr<span class="org-rainbow-delimiters-depth-3">(</span><span class="org-highlight-numbers-number">3</span>, <span class="org-highlight-numbers-number">3</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-type">./</span>cos<span class="org-rainbow-delimiters-depth-2">(</span>Ery<span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
Erz = atan2<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-type">-</span>squeeze<span class="org-rainbow-delimiters-depth-2">(</span>MTr<span class="org-rainbow-delimiters-depth-3">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">2</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-type">./</span>cos<span class="org-rainbow-delimiters-depth-2">(</span>Ery<span class="org-rainbow-delimiters-depth-2">)</span>, squeeze<span class="org-rainbow-delimiters-depth-2">(</span>MTr<span class="org-rainbow-delimiters-depth-3">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">1</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-type">./</span>cos<span class="org-rainbow-delimiters-depth-2">(</span>Ery<span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
|
||||
<div id="orgda4d10e" class="figure">
|
||||
<p><img src="figs/exp_tomo_without_dist_trans.png" alt="exp_tomo_without_dist_trans.png" />
|
||||
</p>
|
||||
<p><span class="figure-number">Figure 1: </span>X-Y-Z translation of the sample w.r.t. granite when performing tomography experiment with no disturbances (<a href="./figs/exp_tomo_without_dist_trans.png">png</a>, <a href="./figs/exp_tomo_without_dist_trans.pdf">pdf</a>)</p>
|
||||
</div>
|
||||
|
||||
|
||||
<div id="orgf194db1" class="figure">
|
||||
<p><img src="figs/exp_tomo_without_dist_rot.png" alt="exp_tomo_without_dist_rot.png" />
|
||||
</p>
|
||||
<p><span class="figure-number">Figure 2: </span>X-Y-Z rotations of the sample w.r.t. granite when performing tomography experiment with no disturbances (<a href="./figs/exp_tomo_without_dist_rot.png">png</a>, <a href="./figs/exp_tomo_without_dist_rot.pdf">pdf</a>)</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<div id="outline-container-orgc99de70" class="outline-3">
|
||||
<h3 id="orgc99de70"><span class="section-number-3">2.3</span> Conclusion</h3>
|
||||
<div class="outline-text-3" id="text-2-3">
|
||||
<div class="important">
|
||||
<p>
|
||||
When everything is aligned, the resulting error motion is very small (nm range) and is quite negligible with respect to the error when disturbances are included.
|
||||
This residual error motion probably comes from a small misalignment somewhere.
|
||||
</p>
|
||||
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<div id="outline-container-org236226d" class="outline-2">
|
||||
<h2 id="org236226d"><span class="section-number-2">3</span> Tomography Experiment with included perturbations</h2>
|
||||
<div class="outline-text-2" id="text-3">
|
||||
<p>
|
||||
<a id="org8c019e4"></a>
|
||||
</p>
|
||||
</div>
|
||||
<div id="outline-container-org8aa359d" class="outline-3">
|
||||
<h3 id="org8aa359d"><span class="section-number-3">3.1</span> Simulation Setup</h3>
|
||||
<div class="outline-text-3" id="text-3-1">
|
||||
<p>
|
||||
We now activate the disturbances.
|
||||
</p>
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">opts = struct<span class="org-rainbow-delimiters-depth-1">(</span>...
|
||||
<span class="org-string">'Dwx'</span>, <span class="org-constant">true</span>, ...<span class="org-comment"> % Ground Motion - X direction</span>
|
||||
<span class="org-string">'Dwy'</span>, <span class="org-constant">true</span>, ...<span class="org-comment"> % Ground Motion - Y direction</span>
|
||||
<span class="org-string">'Dwz'</span>, <span class="org-constant">true</span>, ...<span class="org-comment"> % Ground Motion - Z direction</span>
|
||||
<span class="org-string">'Fty_x'</span>, <span class="org-constant">true</span>, ...<span class="org-comment"> % Translation Stage - X direction</span>
|
||||
<span class="org-string">'Fty_z'</span>, <span class="org-constant">true</span>, ...<span class="org-comment"> % Translation Stage - Z direction</span>
|
||||
<span class="org-string">'Frz_z'</span>, <span class="org-constant">true</span> ...<span class="org-comment"> % Spindle - Z direction</span>
|
||||
<span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
initDisturbances<span class="org-rainbow-delimiters-depth-1">(</span>opts<span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<p>
|
||||
We simulate the model.
|
||||
</p>
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab"><span class="org-matlab-simulink-keyword">sim</span><span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'sim_nano_station_tomo'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<p>
|
||||
And we save the obtained data.
|
||||
</p>
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">tomo_align_dist = struct<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'t'</span>, t, <span class="org-string">'MTr'</span>, MTr<span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
save<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'experiment_tomography/mat/experiment.mat'</span>, <span class="org-string">'tomo_align_dist'</span>, <span class="org-string">'-append'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<div id="outline-container-orgd63048b" class="outline-3">
|
||||
<h3 id="orgd63048b"><span class="section-number-3">3.2</span> Analysis</h3>
|
||||
<div class="outline-text-3" id="text-3-2">
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'experiment_tomography/mat/experiment.mat'</span>, <span class="org-string">'tomo_align_dist'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
t = tomo_align_dist.t;
|
||||
MTr = tomo_align_dist.MTr;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">Edx = squeeze<span class="org-rainbow-delimiters-depth-1">(</span>MTr<span class="org-rainbow-delimiters-depth-2">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">4</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
Edy = squeeze<span class="org-rainbow-delimiters-depth-1">(</span>MTr<span class="org-rainbow-delimiters-depth-2">(</span><span class="org-highlight-numbers-number">2</span>, <span class="org-highlight-numbers-number">4</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
Edz = squeeze<span class="org-rainbow-delimiters-depth-1">(</span>MTr<span class="org-rainbow-delimiters-depth-2">(</span><span class="org-highlight-numbers-number">3</span>, <span class="org-highlight-numbers-number">4</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
<span class="org-comment">% The angles obtained are u-v-w Euler angles (rotations in the moving frame)</span>
|
||||
Ery = atan2<span class="org-rainbow-delimiters-depth-1">(</span> squeeze<span class="org-rainbow-delimiters-depth-2">(</span>MTr<span class="org-rainbow-delimiters-depth-3">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">3</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span>, squeeze<span class="org-rainbow-delimiters-depth-2">(</span>sqrt<span class="org-rainbow-delimiters-depth-3">(</span>MTr<span class="org-rainbow-delimiters-depth-4">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">1</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-4">)</span><span class="org-type">.^</span><span class="org-highlight-numbers-number">2</span> <span class="org-type">+</span> MTr<span class="org-rainbow-delimiters-depth-4">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">2</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-4">)</span><span class="org-type">.^</span><span class="org-highlight-numbers-number">2</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
Erx = atan2<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-type">-</span>squeeze<span class="org-rainbow-delimiters-depth-2">(</span>MTr<span class="org-rainbow-delimiters-depth-3">(</span><span class="org-highlight-numbers-number">2</span>, <span class="org-highlight-numbers-number">3</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-type">./</span>cos<span class="org-rainbow-delimiters-depth-2">(</span>Ery<span class="org-rainbow-delimiters-depth-2">)</span>, squeeze<span class="org-rainbow-delimiters-depth-2">(</span>MTr<span class="org-rainbow-delimiters-depth-3">(</span><span class="org-highlight-numbers-number">3</span>, <span class="org-highlight-numbers-number">3</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-type">./</span>cos<span class="org-rainbow-delimiters-depth-2">(</span>Ery<span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
Erz = atan2<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-type">-</span>squeeze<span class="org-rainbow-delimiters-depth-2">(</span>MTr<span class="org-rainbow-delimiters-depth-3">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">2</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-type">./</span>cos<span class="org-rainbow-delimiters-depth-2">(</span>Ery<span class="org-rainbow-delimiters-depth-2">)</span>, squeeze<span class="org-rainbow-delimiters-depth-2">(</span>MTr<span class="org-rainbow-delimiters-depth-3">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">1</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-type">./</span>cos<span class="org-rainbow-delimiters-depth-2">(</span>Ery<span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
|
||||
<div id="orge9cec44" class="figure">
|
||||
<p><img src="figs/exp_tomo_dist_trans.png" alt="exp_tomo_dist_trans.png" />
|
||||
</p>
|
||||
<p><span class="figure-number">Figure 3: </span>X-Y-Z translation of the sample w.r.t. the granite when performing tomography experiment with disturbances (<a href="./figs/exp_tomo_dist_trans.png">png</a>, <a href="./figs/exp_tomo_dist_trans.pdf">pdf</a>)</p>
|
||||
</div>
|
||||
|
||||
|
||||
<div id="org98cbd3c" class="figure">
|
||||
<p><img src="figs/exp_tomo_dist_rot.png" alt="exp_tomo_dist_rot.png" />
|
||||
</p>
|
||||
<p><span class="figure-number">Figure 4: </span>X-Y-Z rotations of the sample w.r.t. the granite when performing tomography experiment with disturbances (<a href="./figs/exp_tomo_dist_rot.png">png</a>, <a href="./figs/exp_tomo_dist_rot.pdf">pdf</a>)</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<div id="outline-container-org5328197" class="outline-3">
|
||||
<h3 id="org5328197"><span class="section-number-3">3.3</span> Conclusion</h3>
|
||||
<div class="outline-text-3" id="text-3-3">
|
||||
<div class="important">
|
||||
<p>
|
||||
Error motion is what expected from the disturbance measurements.
|
||||
</p>
|
||||
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<div id="outline-container-orgbcf3187" class="outline-2">
|
||||
<h2 id="orgbcf3187"><span class="section-number-2">4</span> Tomography when the micro-hexapod is not centered</h2>
|
||||
<div class="outline-text-2" id="text-4">
|
||||
<p>
|
||||
<a id="org395e7ec"></a>
|
||||
</p>
|
||||
</div>
|
||||
<div id="outline-container-orgb8fc603" class="outline-3">
|
||||
<h3 id="orgb8fc603"><span class="section-number-3">4.1</span> Simulation Setup</h3>
|
||||
<div class="outline-text-3" id="text-4-1">
|
||||
<p>
|
||||
We first set the wanted translation of the Micro Hexapod.
|
||||
</p>
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">P_micro_hexapod = <span class="org-rainbow-delimiters-depth-1">[</span><span class="org-highlight-numbers-number">0</span>.<span class="org-highlight-numbers-number">01</span>; <span class="org-highlight-numbers-number">0</span>; <span class="org-highlight-numbers-number">0</span><span class="org-rainbow-delimiters-depth-1">]</span>; <span class="org-comment">% [m]</span>
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<p>
|
||||
We initialize the reference path.
|
||||
</p>
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">initializeReferences<span class="org-rainbow-delimiters-depth-1">(</span>struct<span class="org-rainbow-delimiters-depth-2">(</span><span class="org-string">'Dh_pos'</span>, <span class="org-rainbow-delimiters-depth-3">[</span>P_micro_hexapod; <span class="org-highlight-numbers-number">0</span>; <span class="org-highlight-numbers-number">0</span>; <span class="org-highlight-numbers-number">0</span><span class="org-rainbow-delimiters-depth-3">]</span>, <span class="org-string">'Rz_type'</span>, <span class="org-string">'rotating'</span>, <span class="org-string">'Rz_period'</span>, <span class="org-highlight-numbers-number">1</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<p>
|
||||
We initialize the stages.
|
||||
</p>
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">initializeMicroHexapod<span class="org-rainbow-delimiters-depth-1">(</span>struct<span class="org-rainbow-delimiters-depth-2">(</span><span class="org-string">'AP'</span>, P_micro_hexapod<span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<p>
|
||||
And we initialize the disturbances to zero.
|
||||
</p>
|
||||
@ -332,88 +608,199 @@ initDisturbances<span class="org-rainbow-delimiters-depth-1">(</span>opts<span c
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab"><span class="org-matlab-simulink-keyword">sim</span><span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'sim_nano_station_tomo'</span><span class="org-rainbow-delimiters-depth-1">)</span>
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">Dsm_without_dist = Dsm;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab"><span class="org-type">figure</span>;
|
||||
hold on;
|
||||
plot<span class="org-rainbow-delimiters-depth-1">(</span>Dsm_without_dist.x.Time, Dsm_without_dist.x.Data, <span class="org-string">'DisplayName'</span>, <span class="org-string">'x'</span><span class="org-rainbow-delimiters-depth-1">)</span>
|
||||
plot<span class="org-rainbow-delimiters-depth-1">(</span>Dsm_without_dist.y.Time, Dsm_without_dist.y.Data, <span class="org-string">'DisplayName'</span>, <span class="org-string">'y'</span><span class="org-rainbow-delimiters-depth-1">)</span>
|
||||
plot<span class="org-rainbow-delimiters-depth-1">(</span>Dsm_without_dist.z.Time, Dsm_without_dist.z.Data, <span class="org-string">'DisplayName'</span>, <span class="org-string">'z'</span><span class="org-rainbow-delimiters-depth-1">)</span>
|
||||
hold off;
|
||||
xlim<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-rainbow-delimiters-depth-2">[</span><span class="org-highlight-numbers-number">2</span>, <span class="org-constant">inf</span><span class="org-rainbow-delimiters-depth-2">]</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
legend<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'location'</span>, <span class="org-string">'northeast'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
|
||||
<div id="org8e9717d" class="figure">
|
||||
<p><img src="figs/exp_tomo_without_dist_trans.png" alt="exp_tomo_without_dist_trans.png" />
|
||||
<p>
|
||||
We simulate the model.
|
||||
</p>
|
||||
<p><span class="figure-number">Figure 1: </span>X-Y-Z translation of the sample w.r.t. granite when performing tomography experiment with no disturbances (<a href="./figs/exp_tomo_without_dist_trans.png">png</a>, <a href="./figs/exp_tomo_without_dist_trans.pdf">pdf</a>)</p>
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab"><span class="org-matlab-simulink-keyword">sim</span><span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'sim_nano_station_tomo'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
|
||||
<p>
|
||||
Rotations.
|
||||
Think of the good way to plot these rotations with respect to time.
|
||||
And we save the obtained data.
|
||||
</p>
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">tomo_not_align = struct<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'t'</span>, t, <span class="org-string">'MTr'</span>, MTr<span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
save<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'experiment_tomography/mat/experiment.mat'</span>, <span class="org-string">'tomo_not_align'</span>, <span class="org-string">'-append'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<div id="outline-container-orgcc1bc22" class="outline-2">
|
||||
<h2 id="orgcc1bc22"><span class="section-number-2">3</span> With Perturbations</h2>
|
||||
<div class="outline-text-2" id="text-3">
|
||||
<div id="outline-container-org22f9788" class="outline-3">
|
||||
<h3 id="org22f9788"><span class="section-number-3">4.2</span> Analysis</h3>
|
||||
<div class="outline-text-3" id="text-4-2">
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'experiment_tomography/mat/experiment.mat'</span>, <span class="org-string">'tomo_not_align'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
t = tomo_not_align.t;
|
||||
MTr = tomo_not_align.MTr;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">Edx = squeeze<span class="org-rainbow-delimiters-depth-1">(</span>MTr<span class="org-rainbow-delimiters-depth-2">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">4</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
Edy = squeeze<span class="org-rainbow-delimiters-depth-1">(</span>MTr<span class="org-rainbow-delimiters-depth-2">(</span><span class="org-highlight-numbers-number">2</span>, <span class="org-highlight-numbers-number">4</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
Edz = squeeze<span class="org-rainbow-delimiters-depth-1">(</span>MTr<span class="org-rainbow-delimiters-depth-2">(</span><span class="org-highlight-numbers-number">3</span>, <span class="org-highlight-numbers-number">4</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
<span class="org-comment">% The angles obtained are u-v-w Euler angles (rotations in the moving frame)</span>
|
||||
Ery = atan2<span class="org-rainbow-delimiters-depth-1">(</span> squeeze<span class="org-rainbow-delimiters-depth-2">(</span>MTr<span class="org-rainbow-delimiters-depth-3">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">3</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span>, squeeze<span class="org-rainbow-delimiters-depth-2">(</span>sqrt<span class="org-rainbow-delimiters-depth-3">(</span>MTr<span class="org-rainbow-delimiters-depth-4">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">1</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-4">)</span><span class="org-type">.^</span><span class="org-highlight-numbers-number">2</span> <span class="org-type">+</span> MTr<span class="org-rainbow-delimiters-depth-4">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">2</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-4">)</span><span class="org-type">.^</span><span class="org-highlight-numbers-number">2</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
Erx = atan2<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-type">-</span>squeeze<span class="org-rainbow-delimiters-depth-2">(</span>MTr<span class="org-rainbow-delimiters-depth-3">(</span><span class="org-highlight-numbers-number">2</span>, <span class="org-highlight-numbers-number">3</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-type">./</span>cos<span class="org-rainbow-delimiters-depth-2">(</span>Ery<span class="org-rainbow-delimiters-depth-2">)</span>, squeeze<span class="org-rainbow-delimiters-depth-2">(</span>MTr<span class="org-rainbow-delimiters-depth-3">(</span><span class="org-highlight-numbers-number">3</span>, <span class="org-highlight-numbers-number">3</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-type">./</span>cos<span class="org-rainbow-delimiters-depth-2">(</span>Ery<span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
Erz = atan2<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-type">-</span>squeeze<span class="org-rainbow-delimiters-depth-2">(</span>MTr<span class="org-rainbow-delimiters-depth-3">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">2</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-type">./</span>cos<span class="org-rainbow-delimiters-depth-2">(</span>Ery<span class="org-rainbow-delimiters-depth-2">)</span>, squeeze<span class="org-rainbow-delimiters-depth-2">(</span>MTr<span class="org-rainbow-delimiters-depth-3">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">1</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-type">./</span>cos<span class="org-rainbow-delimiters-depth-2">(</span>Ery<span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
|
||||
<div id="org7fb9a86" class="figure">
|
||||
<p><img src="figs/exp_tomo_offset_trans.png" alt="exp_tomo_offset_trans.png" />
|
||||
</p>
|
||||
<p><span class="figure-number">Figure 5: </span>X-Y-Z translation of the sample w.r.t. granite when performing tomography experiment with no disturbances (<a href="./figs/exp_tomo_offset_trans.png">png</a>, <a href="./figs/exp_tomo_offset_trans.pdf">pdf</a>)</p>
|
||||
</div>
|
||||
|
||||
|
||||
<div id="orgbe8a23e" class="figure">
|
||||
<p><img src="figs/exp_tomo_offset_rot.png" alt="exp_tomo_offset_rot.png" />
|
||||
</p>
|
||||
<p><span class="figure-number">Figure 6: </span>X-Y-Z rotations of the sample w.r.t. granite when performing tomography experiment with no disturbances (<a href="./figs/exp_tomo_offset_rot.png">png</a>, <a href="./figs/exp_tomo_offset_rot.pdf">pdf</a>)</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<div id="outline-container-orga8287ac" class="outline-3">
|
||||
<h3 id="orga8287ac"><span class="section-number-3">4.3</span> Conclusion</h3>
|
||||
<div class="outline-text-3" id="text-4-3">
|
||||
<div class="important">
|
||||
<p>
|
||||
The main motions are translations in the X direction of the mobile platform (corresponds to the eccentricity of the micro-hexapod) and rotations along the rotating Y axis.
|
||||
</p>
|
||||
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<div id="outline-container-org9e0e5be" class="outline-2">
|
||||
<h2 id="org9e0e5be"><span class="section-number-2">5</span> Raster Scans with the translation stage</h2>
|
||||
<div class="outline-text-2" id="text-5">
|
||||
<p>
|
||||
<a id="orga1dc368"></a>
|
||||
</p>
|
||||
</div>
|
||||
<div id="outline-container-org0b48fba" class="outline-3">
|
||||
<h3 id="org0b48fba"><span class="section-number-3">5.1</span> Simulation Setup</h3>
|
||||
<div class="outline-text-3" id="text-5-1">
|
||||
<p>
|
||||
We set the reference path.
|
||||
</p>
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">initializeReferences<span class="org-rainbow-delimiters-depth-1">(</span>struct<span class="org-rainbow-delimiters-depth-2">(</span><span class="org-string">'Dy_type'</span>, <span class="org-string">'triangular'</span>, <span class="org-string">'Dy_amplitude'</span>, <span class="org-highlight-numbers-number">10e</span><span class="org-type">-</span><span class="org-highlight-numbers-number">3</span>, <span class="org-string">'Dy_period'</span>, <span class="org-highlight-numbers-number">1</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<p>
|
||||
We initialize the stages.
|
||||
</p>
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">initializeGround<span class="org-rainbow-delimiters-depth-1">()</span>;
|
||||
initializeGranite<span class="org-rainbow-delimiters-depth-1">()</span>;
|
||||
initializeTy<span class="org-rainbow-delimiters-depth-1">()</span>;
|
||||
initializeRy<span class="org-rainbow-delimiters-depth-1">()</span>;
|
||||
initializeRz<span class="org-rainbow-delimiters-depth-1">()</span>;
|
||||
initializeMicroHexapod<span class="org-rainbow-delimiters-depth-1">()</span>;
|
||||
initializeAxisc<span class="org-rainbow-delimiters-depth-1">()</span>;
|
||||
initializeMirror<span class="org-rainbow-delimiters-depth-1">()</span>;
|
||||
initializeNanoHexapod<span class="org-rainbow-delimiters-depth-1">(</span>struct<span class="org-rainbow-delimiters-depth-2">(</span><span class="org-string">'actuator'</span>, <span class="org-string">'piezo'</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
initializeSample<span class="org-rainbow-delimiters-depth-1">(</span>struct<span class="org-rainbow-delimiters-depth-2">(</span><span class="org-string">'mass'</span>, <span class="org-highlight-numbers-number">1</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<p>
|
||||
And we initialize the disturbances to zero.
|
||||
</p>
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">opts = struct<span class="org-rainbow-delimiters-depth-1">(</span>...
|
||||
<span class="org-string">'Dwx'</span>, <span class="org-constant">true</span>, ...<span class="org-comment"> % Ground Motion - X direction</span>
|
||||
<span class="org-string">'Dwy'</span>, <span class="org-constant">true</span>, ...<span class="org-comment"> % Ground Motion - Y direction</span>
|
||||
<span class="org-string">'Dwz'</span>, <span class="org-constant">true</span>, ...<span class="org-comment"> % Ground Motion - Z direction</span>
|
||||
<span class="org-string">'Fty_x'</span>, <span class="org-constant">true</span>, ...<span class="org-comment"> % Translation Stage - X direction</span>
|
||||
<span class="org-string">'Fty_z'</span>, <span class="org-constant">true</span>, ...<span class="org-comment"> % Translation Stage - Z direction</span>
|
||||
<span class="org-string">'Frz_z'</span>, <span class="org-constant">true</span> ...<span class="org-comment"> % Spindle - Z direction</span>
|
||||
<span class="org-string">'Dwx'</span>, <span class="org-constant">false</span>, ...<span class="org-comment"> % Ground Motion - X direction</span>
|
||||
<span class="org-string">'Dwy'</span>, <span class="org-constant">false</span>, ...<span class="org-comment"> % Ground Motion - Y direction</span>
|
||||
<span class="org-string">'Dwz'</span>, <span class="org-constant">false</span>, ...<span class="org-comment"> % Ground Motion - Z direction</span>
|
||||
<span class="org-string">'Fty_x'</span>, <span class="org-constant">false</span>, ...<span class="org-comment"> % Translation Stage - X direction</span>
|
||||
<span class="org-string">'Fty_z'</span>, <span class="org-constant">false</span>, ...<span class="org-comment"> % Translation Stage - Z direction</span>
|
||||
<span class="org-string">'Frz_z'</span>, <span class="org-constant">false</span> ...<span class="org-comment"> % Spindle - Z direction</span>
|
||||
<span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
initDisturbances<span class="org-rainbow-delimiters-depth-1">(</span>opts<span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab"><span class="org-matlab-simulink-keyword">sim</span><span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'sim_nano_station_tomo'</span><span class="org-rainbow-delimiters-depth-1">)</span>
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab"><span class="org-type">figure</span>;
|
||||
hold on;
|
||||
plot<span class="org-rainbow-delimiters-depth-1">(</span>Dsm.x.Time, Dsm.x.Data, <span class="org-string">'DisplayName'</span>, <span class="org-string">'x'</span><span class="org-rainbow-delimiters-depth-1">)</span>
|
||||
plot<span class="org-rainbow-delimiters-depth-1">(</span>Dsm.y.Time, Dsm.y.Data, <span class="org-string">'DisplayName'</span>, <span class="org-string">'y'</span><span class="org-rainbow-delimiters-depth-1">)</span>
|
||||
plot<span class="org-rainbow-delimiters-depth-1">(</span>Dsm.z.Time, Dsm.z.Data, <span class="org-string">'DisplayName'</span>, <span class="org-string">'z'</span><span class="org-rainbow-delimiters-depth-1">)</span>
|
||||
hold off;
|
||||
xlim<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-rainbow-delimiters-depth-2">[</span><span class="org-highlight-numbers-number">2</span>, <span class="org-constant">inf</span><span class="org-rainbow-delimiters-depth-2">]</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
legend<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'location'</span>, <span class="org-string">'northeast'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
|
||||
<div id="org230990b" class="figure">
|
||||
<p><img src="figs/exp_tomo_dist_trans.png" alt="exp_tomo_dist_trans.png" />
|
||||
<p>
|
||||
We simulate the model.
|
||||
</p>
|
||||
<p><span class="figure-number">Figure 2: </span>X-Y-Z translation of the sample w.r.t. the granite when performing tomography experiment with disturbances (<a href="./figs/exp_tomo_dist_trans.png">png</a>, <a href="./figs/exp_tomo_dist_trans.pdf">pdf</a>)</p>
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab"><span class="org-matlab-simulink-keyword">sim</span><span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'sim_nano_station_tomo'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<p>
|
||||
And we save the obtained data.
|
||||
</p>
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">ty_scan = struct<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'t'</span>, t, <span class="org-string">'MTr'</span>, MTr<span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
save<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'experiment_tomography/mat/experiment.mat'</span>, <span class="org-string">'ty_scan'</span>, <span class="org-string">'-append'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<div id="outline-container-orge9df7a3" class="outline-3">
|
||||
<h3 id="orge9df7a3"><span class="section-number-3">5.2</span> Analysis</h3>
|
||||
<div class="outline-text-3" id="text-5-2">
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'experiment_tomography/mat/experiment.mat'</span>, <span class="org-string">'ty_scan'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
t = ty_scan.t;
|
||||
MTr = ty_scan.MTr;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
<div class="org-src-container">
|
||||
<pre class="src src-matlab">Edx = squeeze<span class="org-rainbow-delimiters-depth-1">(</span>MTr<span class="org-rainbow-delimiters-depth-2">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">4</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
Edy = squeeze<span class="org-rainbow-delimiters-depth-1">(</span>MTr<span class="org-rainbow-delimiters-depth-2">(</span><span class="org-highlight-numbers-number">2</span>, <span class="org-highlight-numbers-number">4</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
Edz = squeeze<span class="org-rainbow-delimiters-depth-1">(</span>MTr<span class="org-rainbow-delimiters-depth-2">(</span><span class="org-highlight-numbers-number">3</span>, <span class="org-highlight-numbers-number">4</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
<span class="org-comment">% The angles obtained are u-v-w Euler angles (rotations in the moving frame)</span>
|
||||
Ery = atan2<span class="org-rainbow-delimiters-depth-1">(</span> squeeze<span class="org-rainbow-delimiters-depth-2">(</span>MTr<span class="org-rainbow-delimiters-depth-3">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">3</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span>, squeeze<span class="org-rainbow-delimiters-depth-2">(</span>sqrt<span class="org-rainbow-delimiters-depth-3">(</span>MTr<span class="org-rainbow-delimiters-depth-4">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">1</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-4">)</span><span class="org-type">.^</span><span class="org-highlight-numbers-number">2</span> <span class="org-type">+</span> MTr<span class="org-rainbow-delimiters-depth-4">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">2</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-4">)</span><span class="org-type">.^</span><span class="org-highlight-numbers-number">2</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
Erx = atan2<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-type">-</span>squeeze<span class="org-rainbow-delimiters-depth-2">(</span>MTr<span class="org-rainbow-delimiters-depth-3">(</span><span class="org-highlight-numbers-number">2</span>, <span class="org-highlight-numbers-number">3</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-type">./</span>cos<span class="org-rainbow-delimiters-depth-2">(</span>Ery<span class="org-rainbow-delimiters-depth-2">)</span>, squeeze<span class="org-rainbow-delimiters-depth-2">(</span>MTr<span class="org-rainbow-delimiters-depth-3">(</span><span class="org-highlight-numbers-number">3</span>, <span class="org-highlight-numbers-number">3</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-type">./</span>cos<span class="org-rainbow-delimiters-depth-2">(</span>Ery<span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
Erz = atan2<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-type">-</span>squeeze<span class="org-rainbow-delimiters-depth-2">(</span>MTr<span class="org-rainbow-delimiters-depth-3">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">2</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-type">./</span>cos<span class="org-rainbow-delimiters-depth-2">(</span>Ery<span class="org-rainbow-delimiters-depth-2">)</span>, squeeze<span class="org-rainbow-delimiters-depth-2">(</span>MTr<span class="org-rainbow-delimiters-depth-3">(</span><span class="org-highlight-numbers-number">1</span>, <span class="org-highlight-numbers-number">1</span>, <span class="org-type">:</span><span class="org-rainbow-delimiters-depth-3">)</span><span class="org-rainbow-delimiters-depth-2">)</span><span class="org-type">./</span>cos<span class="org-rainbow-delimiters-depth-2">(</span>Ery<span class="org-rainbow-delimiters-depth-2">)</span><span class="org-rainbow-delimiters-depth-1">)</span>;
|
||||
</pre>
|
||||
</div>
|
||||
|
||||
|
||||
<div id="org3533d00" class="figure">
|
||||
<p><img src="figs/exp_ty_scan_trans.png" alt="exp_ty_scan_trans.png" />
|
||||
</p>
|
||||
<p><span class="figure-number">Figure 7: </span>X-Y-Z translation of the sample w.r.t. granite when performing tomography experiment with no disturbances (<a href="./figs/exp_ty_scan_trans.png">png</a>, <a href="./figs/exp_ty_scan_trans.pdf">pdf</a>)</p>
|
||||
</div>
|
||||
|
||||
|
||||
<div id="orgcf32c40" class="figure">
|
||||
<p><img src="figs/exp_ty_scan_rot.png" alt="exp_ty_scan_rot.png" />
|
||||
</p>
|
||||
<p><span class="figure-number">Figure 8: </span>X-Y-Z rotations of the sample w.r.t. granite when performing tomography experiment with no disturbances (<a href="./figs/exp_ty_scan_rot.png">png</a>, <a href="./figs/exp_ty_scan_rot.pdf">pdf</a>)</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
|
||||
<div id="outline-container-orgbdb4d14" class="outline-3">
|
||||
<h3 id="orgbdb4d14"><span class="section-number-3">5.3</span> Conclusion</h3>
|
||||
<div class="outline-text-3" id="text-5-3">
|
||||
<div class="important">
|
||||
<p>
|
||||
This is logic that the main error moving is translation along the Y axis and rotation along the X axis.
|
||||
In order to reduce the errors, we can make a smoother reference path for the translation stage.
|
||||
</p>
|
||||
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<div id="postamble" class="status">
|
||||
<p class="author">Author: Dehaeze Thomas</p>
|
||||
<p class="date">Created: 2019-12-13 ven. 19:06</p>
|
||||
<p class="date">Created: 2019-12-17 mar. 18:01</p>
|
||||
<p class="validation"><a href="http://validator.w3.org/check?uri=referer">Validate</a></p>
|
||||
</div>
|
||||
</body>
|
||||
|
@ -42,6 +42,20 @@
|
||||
:END:
|
||||
|
||||
* Introduction :ignore:
|
||||
The goal here is to simulate some scientific experiments with the tuned Simscape model when no control is applied to the nano-hexapod.
|
||||
|
||||
This has several goals:
|
||||
- Validate the model
|
||||
- Estimate the expected error motion for the experiments
|
||||
- Estimate the stroke that we may need for the nano-hexapod
|
||||
|
||||
The document in organized as follow:
|
||||
- In section [[sec:simscape_model]] the Simscape model is initialized
|
||||
- In section [[sec:tomo_no_dist]] a tomography experiment is performed where the sample is aligned with the rotation axis. No disturbance is included
|
||||
- In section [[sec:tomo_dist]], the same is done but with disturbance included
|
||||
- In section [[sec:tomo_hexa_trans]] the micro-hexapod translate the sample such that its center of mass is no longer aligned with the rotation axis. No disturbance is included
|
||||
- In section [[sec:ty_scans]], scans with the translation stage are simulated with no perturbation included
|
||||
|
||||
* Matlab Init :noexport:ignore:
|
||||
#+begin_src matlab :tangle no :exports none :results silent :noweb yes :var current_dir=(file-name-directory buffer-file-name)
|
||||
<<matlab-dir>>
|
||||
@ -56,6 +70,8 @@
|
||||
#+end_src
|
||||
|
||||
* Simscape Model
|
||||
<<sec:simscape_model>>
|
||||
|
||||
The simulink file to do tomography experiments is =sim_nano_station_tomo.slx=.
|
||||
#+begin_src matlab
|
||||
open('experiment_tomography/matlab/sim_nano_station_tomo.slx')
|
||||
@ -81,14 +97,17 @@ We first initialize all the stages.
|
||||
initializeSample(struct('mass', 1));
|
||||
#+end_src
|
||||
|
||||
* Tomography Experiment with no disturbances
|
||||
** Simulation Setup
|
||||
We initialize the reference path for all the stages.
|
||||
All stage is set to its zero position except the Spindle which is rotating at 60rpm.
|
||||
#+begin_src matlab
|
||||
initializeReferences(struct('Rz_type', 'rotating', 'Rz_period', 1));
|
||||
#+end_src
|
||||
|
||||
* Tomography Experiment with no disturbances
|
||||
<<sec:tomo_no_dist>>
|
||||
** Introduction :ignore:
|
||||
|
||||
** Simulation Setup
|
||||
And we initialize the disturbances to be equal to zero.
|
||||
#+begin_src matlab
|
||||
opts = struct(...
|
||||
@ -109,11 +128,17 @@ We simulate the model.
|
||||
|
||||
And we save the obtained data.
|
||||
#+begin_src matlab
|
||||
MTr_alig_no_dist = MTr;
|
||||
save('experiment_tomography/mat/experiment.mat', 'MTr_alig_no_dist', '-append');
|
||||
tomo_align_no_dist = struct('t', t, 'MTr', MTr);
|
||||
save('experiment_tomography/mat/experiment.mat', 'tomo_align_no_dist', '-append');
|
||||
#+end_src
|
||||
|
||||
** Analysis
|
||||
#+begin_src matlab
|
||||
load('experiment_tomography/mat/experiment.mat', 'tomo_align_no_dist');
|
||||
t = tomo_align_no_dist.t;
|
||||
MTr = tomo_align_no_dist.MTr;
|
||||
#+end_src
|
||||
|
||||
#+begin_src matlab
|
||||
Edx = squeeze(MTr(1, 4, :));
|
||||
Edy = squeeze(MTr(2, 4, :));
|
||||
@ -126,18 +151,26 @@ And we save the obtained data.
|
||||
|
||||
#+begin_src matlab :exports none
|
||||
figure;
|
||||
hold on;
|
||||
ax1 = subplot(1, 3, 1);
|
||||
plot(t, Edx, 'DisplayName', '$\epsilon_{x}$')
|
||||
plot(t, Edy, 'DisplayName', '$\epsilon_{y}$')
|
||||
plot(t, Edz, 'DisplayName', '$\epsilon_{z}$')
|
||||
hold off;
|
||||
xlabel('Time [s]'); ylabel('Displacement [m]');
|
||||
xlim([2, inf]);
|
||||
ylabel('Displacement [m]');
|
||||
legend('location', 'northeast');
|
||||
|
||||
ax2 = subplot(1, 3, 2);
|
||||
plot(t, Edy, 'DisplayName', '$\epsilon_{y}$')
|
||||
xlabel('Time [s]');
|
||||
legend('location', 'northeast');
|
||||
|
||||
ax3 = subplot(1, 3, 3);
|
||||
plot(t, Edz, 'DisplayName', '$\epsilon_{z}$')
|
||||
legend('location', 'northeast');
|
||||
|
||||
linkaxes([ax1,ax2,ax3],'x');
|
||||
xlim([1, inf]);
|
||||
#+end_src
|
||||
|
||||
#+HEADER: :tangle no :exports results :results none :noweb yes
|
||||
#+begin_src matlab :var filepath="figs/exp_tomo_without_dist_trans.pdf" :var figsize="wide-normal" :post pdf2svg(file=*this*, ext="png")
|
||||
#+begin_src matlab :var filepath="figs/exp_tomo_without_dist_trans.pdf" :var figsize="full-normal" :post pdf2svg(file=*this*, ext="png")
|
||||
<<plt-matlab>>
|
||||
#+end_src
|
||||
|
||||
@ -147,18 +180,26 @@ And we save the obtained data.
|
||||
|
||||
#+begin_src matlab :exports none
|
||||
figure;
|
||||
hold on;
|
||||
ax1 = subplot(1, 3, 1);
|
||||
plot(t, Erx, 'DisplayName', '$\epsilon_{\theta x}$')
|
||||
plot(t, Ery, 'DisplayName', '$\epsilon_{\theta y}$')
|
||||
plot(t, Erz, 'DisplayName', '$\epsilon_{\theta z}$')
|
||||
hold off;
|
||||
xlabel('Time [s]'); ylabel('Rotation [rad]');
|
||||
xlim([2, inf]);
|
||||
ylabel('Rotation [rad]');
|
||||
legend('location', 'northeast');
|
||||
|
||||
ax2 = subplot(1, 3, 2);
|
||||
plot(t, Ery, 'DisplayName', '$\epsilon_{\theta y}$')
|
||||
xlabel('Time [s]');
|
||||
legend('location', 'northeast');
|
||||
|
||||
ax3 = subplot(1, 3, 3);
|
||||
plot(t, Erz, 'DisplayName', '$\epsilon_{\theta z}$')
|
||||
legend('location', 'northeast');
|
||||
|
||||
linkaxes([ax1,ax2,ax3],'x');
|
||||
xlim([1, inf]);
|
||||
#+end_src
|
||||
|
||||
#+HEADER: :tangle no :exports results :results none :noweb yes
|
||||
#+begin_src matlab :var filepath="figs/exp_tomo_without_dist_rot.pdf" :var figsize="wide-normal" :post pdf2svg(file=*this*, ext="png")
|
||||
#+begin_src matlab :var filepath="figs/exp_tomo_without_dist_rot.pdf" :var figsize="full-tall" :post pdf2svg(file=*this*, ext="png")
|
||||
<<plt-matlab>>
|
||||
#+end_src
|
||||
|
||||
@ -166,7 +207,17 @@ And we save the obtained data.
|
||||
#+CAPTION: X-Y-Z rotations of the sample w.r.t. granite when performing tomography experiment with no disturbances ([[./figs/exp_tomo_without_dist_rot.png][png]], [[./figs/exp_tomo_without_dist_rot.pdf][pdf]])
|
||||
[[file:figs/exp_tomo_without_dist_rot.png]]
|
||||
|
||||
* With Perturbations
|
||||
** Conclusion
|
||||
|
||||
#+begin_important
|
||||
When everything is aligned, the resulting error motion is very small (nm range) and is quite negligible with respect to the error when disturbances are included.
|
||||
This residual error motion probably comes from a small misalignment somewhere.
|
||||
#+end_important
|
||||
|
||||
* Tomography Experiment with included perturbations
|
||||
<<sec:tomo_dist>>
|
||||
** Introduction :ignore:
|
||||
|
||||
** Simulation Setup
|
||||
We now activate the disturbances.
|
||||
#+begin_src matlab
|
||||
@ -188,11 +239,17 @@ We simulate the model.
|
||||
|
||||
And we save the obtained data.
|
||||
#+begin_src matlab
|
||||
MTr_alig_dist = MTr;
|
||||
save('experiment_tomography/mat/experiment.mat', 'MTr_alig_dist', '-append');
|
||||
tomo_align_dist = struct('t', t, 'MTr', MTr);
|
||||
save('experiment_tomography/mat/experiment.mat', 'tomo_align_dist', '-append');
|
||||
#+end_src
|
||||
|
||||
** Analysis
|
||||
#+begin_src matlab
|
||||
load('experiment_tomography/mat/experiment.mat', 'tomo_align_dist');
|
||||
t = tomo_align_dist.t;
|
||||
MTr = tomo_align_dist.MTr;
|
||||
#+end_src
|
||||
|
||||
#+begin_src matlab
|
||||
Edx = squeeze(MTr(1, 4, :));
|
||||
Edy = squeeze(MTr(2, 4, :));
|
||||
@ -205,18 +262,26 @@ And we save the obtained data.
|
||||
|
||||
#+begin_src matlab :exports none
|
||||
figure;
|
||||
hold on;
|
||||
ax1 = subplot(1, 3, 1);
|
||||
plot(t, Edx, 'DisplayName', '$\epsilon_{x}$')
|
||||
plot(t, Edy, 'DisplayName', '$\epsilon_{y}$')
|
||||
plot(t, Edz, 'DisplayName', '$\epsilon_{z}$')
|
||||
hold off;
|
||||
xlabel('Time [s]'); ylabel('Displacement [m]');
|
||||
xlim([2, inf]);
|
||||
ylabel('Displacement [m]');
|
||||
legend('location', 'northeast');
|
||||
|
||||
ax2 = subplot(1, 3, 2);
|
||||
plot(t, Edy, 'DisplayName', '$\epsilon_{y}$')
|
||||
xlabel('Time [s]');
|
||||
legend('location', 'northeast');
|
||||
|
||||
ax3 = subplot(1, 3, 3);
|
||||
plot(t, Edz, 'DisplayName', '$\epsilon_{z}$')
|
||||
legend('location', 'northeast');
|
||||
|
||||
linkaxes([ax1,ax2,ax3],'x');
|
||||
xlim([1, inf]);
|
||||
#+end_src
|
||||
|
||||
#+HEADER: :tangle no :exports results :results none :noweb yes
|
||||
#+begin_src matlab :var filepath="figs/exp_tomo_dist_trans.pdf" :var figsize="wide-normal" :post pdf2svg(file=*this*, ext="png")
|
||||
#+begin_src matlab :var filepath="figs/exp_tomo_dist_trans.pdf" :var figsize="full-normal" :post pdf2svg(file=*this*, ext="png")
|
||||
<<plt-matlab>>
|
||||
#+end_src
|
||||
|
||||
@ -226,18 +291,26 @@ And we save the obtained data.
|
||||
|
||||
#+begin_src matlab :exports none
|
||||
figure;
|
||||
hold on;
|
||||
ax1 = subplot(1, 3, 1);
|
||||
plot(t, Erx, 'DisplayName', '$\epsilon_{\theta x}$')
|
||||
plot(t, Ery, 'DisplayName', '$\epsilon_{\theta y}$')
|
||||
plot(t, Erz, 'DisplayName', '$\epsilon_{\theta z}$')
|
||||
hold off;
|
||||
xlabel('Time [s]'); ylabel('Rotation [rad]');
|
||||
xlim([2, inf]);
|
||||
ylabel('Rotation [rad]');
|
||||
legend('location', 'northeast');
|
||||
|
||||
ax2 = subplot(1, 3, 2);
|
||||
plot(t, Ery, 'DisplayName', '$\epsilon_{\theta y}$')
|
||||
xlabel('Time [s]');
|
||||
legend('location', 'northeast');
|
||||
|
||||
ax3 = subplot(1, 3, 3);
|
||||
plot(t, Erz, 'DisplayName', '$\epsilon_{\theta z}$')
|
||||
legend('location', 'northeast');
|
||||
|
||||
linkaxes([ax1,ax2,ax3],'x');
|
||||
xlim([1, inf]);
|
||||
#+end_src
|
||||
|
||||
#+HEADER: :tangle no :exports results :results none :noweb yes
|
||||
#+begin_src matlab :var filepath="figs/exp_tomo_dist_rot.pdf" :var figsize="wide-normal" :post pdf2svg(file=*this*, ext="png")
|
||||
#+begin_src matlab :var filepath="figs/exp_tomo_dist_rot.pdf" :var figsize="full-normal" :post pdf2svg(file=*this*, ext="png")
|
||||
<<plt-matlab>>
|
||||
#+end_src
|
||||
|
||||
@ -245,7 +318,16 @@ And we save the obtained data.
|
||||
#+CAPTION: X-Y-Z rotations of the sample w.r.t. the granite when performing tomography experiment with disturbances ([[./figs/exp_tomo_dist_rot.png][png]], [[./figs/exp_tomo_dist_rot.pdf][pdf]])
|
||||
[[file:figs/exp_tomo_dist_rot.png]]
|
||||
|
||||
* Tomography
|
||||
** Conclusion
|
||||
|
||||
#+begin_important
|
||||
Error motion is what expected from the disturbance measurements.
|
||||
#+end_important
|
||||
|
||||
* Tomography when the micro-hexapod is not centered
|
||||
<<sec:tomo_hexa_trans>>
|
||||
** Introduction :ignore:
|
||||
|
||||
** Simulation Setup
|
||||
We first set the wanted translation of the Micro Hexapod.
|
||||
#+begin_src matlab
|
||||
@ -282,11 +364,17 @@ We simulate the model.
|
||||
|
||||
And we save the obtained data.
|
||||
#+begin_src matlab
|
||||
MTr_not_alig = MTr;
|
||||
save('experiment_tomography/mat/experiment.mat', 'MTr_not_alig', '-append');
|
||||
tomo_not_align = struct('t', t, 'MTr', MTr);
|
||||
save('experiment_tomography/mat/experiment.mat', 'tomo_not_align', '-append');
|
||||
#+end_src
|
||||
|
||||
** Analysis
|
||||
#+begin_src matlab
|
||||
load('experiment_tomography/mat/experiment.mat', 'tomo_not_align');
|
||||
t = tomo_not_align.t;
|
||||
MTr = tomo_not_align.MTr;
|
||||
#+end_src
|
||||
|
||||
#+begin_src matlab
|
||||
Edx = squeeze(MTr(1, 4, :));
|
||||
Edy = squeeze(MTr(2, 4, :));
|
||||
@ -299,18 +387,26 @@ And we save the obtained data.
|
||||
|
||||
#+begin_src matlab :exports none
|
||||
figure;
|
||||
hold on;
|
||||
ax1 = subplot(1, 3, 1);
|
||||
plot(t, Edx, 'DisplayName', '$\epsilon_{x}$')
|
||||
plot(t, Edy, 'DisplayName', '$\epsilon_{y}$')
|
||||
plot(t, Edz, 'DisplayName', '$\epsilon_{z}$')
|
||||
hold off;
|
||||
xlabel('Time [s]'); ylabel('Displacement [m]');
|
||||
xlim([2, inf]);
|
||||
ylabel('Displacement [m]');
|
||||
legend('location', 'northeast');
|
||||
|
||||
ax2 = subplot(1, 3, 2);
|
||||
plot(t, Edy, 'DisplayName', '$\epsilon_{y}$')
|
||||
xlabel('Time [s]');
|
||||
legend('location', 'northeast');
|
||||
|
||||
ax3 = subplot(1, 3, 3);
|
||||
plot(t, Edz, 'DisplayName', '$\epsilon_{z}$')
|
||||
legend('location', 'northeast');
|
||||
|
||||
linkaxes([ax1,ax2,ax3],'x');
|
||||
xlim([1, inf]);
|
||||
#+end_src
|
||||
|
||||
#+HEADER: :tangle no :exports results :results none :noweb yes
|
||||
#+begin_src matlab :var filepath="figs/exp_tomo_offset_trans.pdf" :var figsize="wide-normal" :post pdf2svg(file=*this*, ext="png")
|
||||
#+begin_src matlab :var filepath="figs/exp_tomo_offset_trans.pdf" :var figsize="full-normal" :post pdf2svg(file=*this*, ext="png")
|
||||
<<plt-matlab>>
|
||||
#+end_src
|
||||
|
||||
@ -320,18 +416,26 @@ And we save the obtained data.
|
||||
|
||||
#+begin_src matlab :exports none
|
||||
figure;
|
||||
hold on;
|
||||
ax1 = subplot(1, 3, 1);
|
||||
plot(t, Erx, 'DisplayName', '$\epsilon_{\theta x}$')
|
||||
plot(t, Ery, 'DisplayName', '$\epsilon_{\theta y}$')
|
||||
plot(t, Erz, 'DisplayName', '$\epsilon_{\theta z}$')
|
||||
hold off;
|
||||
xlabel('Time [s]'); ylabel('Rotation [rad]');
|
||||
xlim([2, inf]);
|
||||
ylabel('Rotation [rad]');
|
||||
legend('location', 'northeast');
|
||||
|
||||
ax2 = subplot(1, 3, 2);
|
||||
plot(t, Ery, 'DisplayName', '$\epsilon_{\theta y}$')
|
||||
xlabel('Time [s]');
|
||||
legend('location', 'northeast');
|
||||
|
||||
ax3 = subplot(1, 3, 3);
|
||||
plot(t, Erz, 'DisplayName', '$\epsilon_{\theta z}$')
|
||||
legend('location', 'northeast');
|
||||
|
||||
linkaxes([ax1,ax2,ax3],'x');
|
||||
xlim([1, inf]);
|
||||
#+end_src
|
||||
|
||||
#+HEADER: :tangle no :exports results :results none :noweb yes
|
||||
#+begin_src matlab :var filepath="figs/exp_tomo_offset_rot.pdf" :var figsize="wide-normal" :post pdf2svg(file=*this*, ext="png")
|
||||
#+begin_src matlab :var filepath="figs/exp_tomo_offset_rot.pdf" :var figsize="full-normal" :post pdf2svg(file=*this*, ext="png")
|
||||
<<plt-matlab>>
|
||||
#+end_src
|
||||
|
||||
@ -339,245 +443,138 @@ And we save the obtained data.
|
||||
#+CAPTION: X-Y-Z rotations of the sample w.r.t. granite when performing tomography experiment with no disturbances ([[./figs/exp_tomo_offset_rot.png][png]], [[./figs/exp_tomo_offset_rot.pdf][pdf]])
|
||||
[[file:figs/exp_tomo_offset_rot.png]]
|
||||
|
||||
* TODO Tests on the transformation from reference to wanted position :noexport:
|
||||
:PROPERTIES:
|
||||
:header-args:matlab+: :eval no
|
||||
:END:
|
||||
** Conclusion
|
||||
|
||||
#+begin_important
|
||||
The main motions are translations in the X direction of the mobile platform (corresponds to the eccentricity of the micro-hexapod) and rotations along the rotating Y axis.
|
||||
#+end_important
|
||||
|
||||
* Raster Scans with the translation stage
|
||||
<<sec:ty_scans>>
|
||||
** Introduction :ignore:
|
||||
#+begin_quote
|
||||
Rx = [1 0 0;
|
||||
0 cos(t) -sin(t);
|
||||
0 sin(t) cos(t)];
|
||||
|
||||
Ry = [ cos(t) 0 sin(t);
|
||||
0 1 0;
|
||||
-sin(t) 0 cos(t)];
|
||||
|
||||
Rz = [cos(t) -sin(t) 0;
|
||||
sin(t) cos(t) 0;
|
||||
0 0 1];
|
||||
#+end_quote
|
||||
|
||||
Let's define the following frames:
|
||||
- $\{W\}$ the frame that is *fixed to the granite* and its origin at the theoretical meeting point between the X-ray and the spindle axis.
|
||||
- $\{S\}$ the frame *attached to the sample* (in reality attached to the top platform of the nano-hexapod) with its origin at 175mm above the top platform of the nano-hexapod.
|
||||
Its origin is $O_S$.
|
||||
- $\{T\}$ the theoretical wanted frame that correspond to the wanted pose of the frame $\{S\}$.
|
||||
$\{T\}$ is computed from the wanted position of each stage. It is thus theoretical and does not correspond to a real position.
|
||||
The origin of $T$ is $O_T$ and is the wanted position of the sample.
|
||||
|
||||
Thus:
|
||||
- the *measurement* of the position of the sample corresponds to ${}^W O_S = \begin{bmatrix} {}^WP_{x,m} & {}^WP_{y,m} & {}^WP_{z,m} \end{bmatrix}^T$ in translation and to $\theta_m {}^W\bm{s}_m = \theta_m \cdot \begin{bmatrix} {}^Ws_{x,m} & {}^Ws_{y,m} & {}^Ws_{z,m} \end{bmatrix}^T$ in rotations
|
||||
- the *wanted position* of the sample expressed w.r.t. the granite is ${}^W O_T = \begin{bmatrix} {}^WP_{x,r} & {}^WP_{y,r} & {}^WP_{z,r} \end{bmatrix}^T$ in translation and to $\theta_r {}^W\bm{s}_r = \theta_r \cdot \begin{bmatrix} {}^Ws_{x,r} & {}^Ws_{y,r} & {}^Ws_{z,r} \end{bmatrix}^T$ in rotations
|
||||
|
||||
** Wanted Position of the Sample with respect to the Granite
|
||||
Let's define the wanted position of each stage.
|
||||
** Simulation Setup
|
||||
We set the reference path.
|
||||
#+begin_src matlab
|
||||
Ty = 0; % [m]
|
||||
Ry = 3*pi/180; % [rad]
|
||||
Rz = 180*pi/180; % [rad]
|
||||
|
||||
% Hexapod (first consider only translations)
|
||||
Thx = 0; % [m]
|
||||
Thy = 0; % [m]
|
||||
Thz = 0; % [m]
|
||||
initializeReferences(struct('Dy_type', 'triangular', 'Dy_amplitude', 10e-3, 'Dy_period', 1));
|
||||
#+end_src
|
||||
|
||||
Now, we compute the corresponding wanted translation and rotation of the sample with respect to the granite frame $\{W\}$.
|
||||
This corresponds to ${}^WO_T$ and $\theta_m {}^Ws_m$.
|
||||
|
||||
To do so, we have to define the homogeneous transformation for each stage.
|
||||
We initialize the stages.
|
||||
#+begin_src matlab
|
||||
% Translation Stage
|
||||
Rty = [1 0 0 0;
|
||||
0 1 0 Ty;
|
||||
0 0 1 0;
|
||||
0 0 0 1];
|
||||
|
||||
% Tilt Stage - Pure rotating aligned with Ob
|
||||
Rry = [ cos(Ry) 0 sin(Ry) 0;
|
||||
0 1 0 0;
|
||||
-sin(Ry) 0 cos(Ry) 0;
|
||||
0 0 0 1];
|
||||
|
||||
% Spindle - Rotation along the Z axis
|
||||
Rrz = [cos(Rz) -sin(Rz) 0 0 ;
|
||||
sin(Rz) cos(Rz) 0 0 ;
|
||||
0 0 1 0 ;
|
||||
0 0 0 1 ];
|
||||
|
||||
% Micro-Hexapod (only rotations first)
|
||||
Rh = [1 0 0 Thx ;
|
||||
0 1 0 Thy ;
|
||||
0 0 1 Thz ;
|
||||
0 0 0 1 ];
|
||||
initializeGround();
|
||||
initializeGranite();
|
||||
initializeTy();
|
||||
initializeRy();
|
||||
initializeRz();
|
||||
initializeMicroHexapod();
|
||||
initializeAxisc();
|
||||
initializeMirror();
|
||||
initializeNanoHexapod(struct('actuator', 'piezo'));
|
||||
initializeSample(struct('mass', 1));
|
||||
#+end_src
|
||||
|
||||
We combine the individual homogeneous transformations into one homogeneous transformation for all the station.
|
||||
And we initialize the disturbances to zero.
|
||||
#+begin_src matlab
|
||||
Ttot = Rty*Rry*Rrz*Rh;
|
||||
opts = struct(...
|
||||
'Dwx', false, ... % Ground Motion - X direction
|
||||
'Dwy', false, ... % Ground Motion - Y direction
|
||||
'Dwz', false, ... % Ground Motion - Z direction
|
||||
'Fty_x', false, ... % Translation Stage - X direction
|
||||
'Fty_z', false, ... % Translation Stage - Z direction
|
||||
'Frz_z', false ... % Spindle - Z direction
|
||||
);
|
||||
initDisturbances(opts);
|
||||
#+end_src
|
||||
|
||||
Using this homogeneous transformation, we can compute the wanted position and orientation of the sample with respect to the granite.
|
||||
|
||||
Translation.
|
||||
We simulate the model.
|
||||
#+begin_src matlab
|
||||
WOr = Ttot*[0;0;0;1];
|
||||
WOr = WOr(1:3);
|
||||
sim('sim_nano_station_tomo');
|
||||
#+end_src
|
||||
|
||||
Rotation.
|
||||
And we save the obtained data.
|
||||
#+begin_src matlab
|
||||
thetar = acos((trace(Ttot(1:3, 1:3))-1)/2)
|
||||
if thetar == 0
|
||||
WSr = [0; 0; 0];
|
||||
else
|
||||
[V, D] = eig(Ttot(1:3, 1:3));
|
||||
WSr = thetar*V(:, abs(diag(D) - 1) < eps(1));
|
||||
end
|
||||
ty_scan = struct('t', t, 'MTr', MTr);
|
||||
save('experiment_tomography/mat/experiment.mat', 'ty_scan', '-append');
|
||||
#+end_src
|
||||
|
||||
** Analysis
|
||||
#+begin_src matlab
|
||||
load('experiment_tomography/mat/experiment.mat', 'ty_scan');
|
||||
t = ty_scan.t;
|
||||
MTr = ty_scan.MTr;
|
||||
#+end_src
|
||||
|
||||
#+begin_src matlab
|
||||
WPr = [WOr ; WSr];
|
||||
Edx = squeeze(MTr(1, 4, :));
|
||||
Edy = squeeze(MTr(2, 4, :));
|
||||
Edz = squeeze(MTr(3, 4, :));
|
||||
% The angles obtained are u-v-w Euler angles (rotations in the moving frame)
|
||||
Ery = atan2( squeeze(MTr(1, 3, :)), squeeze(sqrt(MTr(1, 1, :).^2 + MTr(1, 2, :).^2)));
|
||||
Erx = atan2(-squeeze(MTr(2, 3, :))./cos(Ery), squeeze(MTr(3, 3, :))./cos(Ery));
|
||||
Erz = atan2(-squeeze(MTr(1, 2, :))./cos(Ery), squeeze(MTr(1, 1, :))./cos(Ery));
|
||||
#+end_src
|
||||
|
||||
** Measured Position of the Sample with respect to the Granite
|
||||
The measurement of the position of the sample using the metrology system gives the position and orientation of the sample with respect to the granite.
|
||||
#+begin_src matlab
|
||||
% Measurements: Xm, Ym, Zm, Rx, Ry, Rz
|
||||
Dxm = 0; % [m]
|
||||
Dym = 0; % [m]
|
||||
Dzm = 0; % [m]
|
||||
#+begin_src matlab :exports none
|
||||
figure;
|
||||
ax1 = subplot(1, 3, 1);
|
||||
plot(t, Edx, 'DisplayName', '$\epsilon_{x}$')
|
||||
ylabel('Displacement [m]');
|
||||
legend('location', 'northeast');
|
||||
|
||||
Rxm = 0*pi/180; % [rad]
|
||||
Rym = 0*pi/180; % [rad]
|
||||
Rzm = 180*pi/180; % [rad]
|
||||
ax2 = subplot(1, 3, 2);
|
||||
plot(t, Edy, 'DisplayName', '$\epsilon_{y}$')
|
||||
xlabel('Time [s]');
|
||||
legend('location', 'northeast');
|
||||
|
||||
ax3 = subplot(1, 3, 3);
|
||||
plot(t, Edz, 'DisplayName', '$\epsilon_{z}$')
|
||||
legend('location', 'northeast');
|
||||
|
||||
linkaxes([ax1,ax2,ax3],'x');
|
||||
xlim([1, inf]);
|
||||
#+end_src
|
||||
|
||||
Let's compute the corresponding orientation using screw axis.
|
||||
#+begin_src matlab
|
||||
Trxm = [1 0 0;
|
||||
0 cos(Rxm) -sin(Rxm);
|
||||
0 sin(Rxm) cos(Rxm)];
|
||||
Trym = [ cos(Rym) 0 sin(Rym);
|
||||
0 1 0;
|
||||
-sin(Rym) 0 cos(Rym)];
|
||||
Trzm = [cos(Rzm) -sin(Rzm) 0;
|
||||
sin(Rzm) cos(Rzm) 0;
|
||||
0 0 1];
|
||||
|
||||
STw = [[ Trym*Trxm*Trzm , [Dxm; Dym; Dzm]]; 0 0 0 1];
|
||||
#+HEADER: :tangle no :exports results :results none :noweb yes
|
||||
#+begin_src matlab :var filepath="figs/exp_ty_scan_trans.pdf" :var figsize="full-normal" :post pdf2svg(file=*this*, ext="png")
|
||||
<<plt-matlab>>
|
||||
#+end_src
|
||||
|
||||
We then obtain the orientation measurement in the form of screw coordinate $\theta_m ({}^Ws_{x,m},\ {}^Ws_{y,m},\ {}^Ws_{z,m})^T$ where:
|
||||
- $\theta_m = \cos^{-1} \frac{\text{Tr}(R) - 1}{2}$
|
||||
- ${}^W\bm{s}_m$ is the eigen vector of the rotation matrix $R$ corresponding to the eigen value $\lambda = 1$
|
||||
#+NAME: fig:exp_ty_scan_trans
|
||||
#+CAPTION: X-Y-Z translation of the sample w.r.t. granite when performing tomography experiment with no disturbances ([[./figs/exp_ty_scan_trans.png][png]], [[./figs/exp_ty_scan_trans.pdf][pdf]])
|
||||
[[file:figs/exp_ty_scan_trans.png]]
|
||||
|
||||
#+begin_src matlab
|
||||
thetam = acos((trace(STw(1:3, 1:3))-1)/2); % [rad]
|
||||
if thetam == 0
|
||||
WSm = [0; 0; 0];
|
||||
else
|
||||
[V, D] = eig(STw(1:3, 1:3));
|
||||
WSm = thetam*V(:, abs(diag(D) - 1) < eps(1));
|
||||
end
|
||||
#+begin_src matlab :exports none
|
||||
figure;
|
||||
ax1 = subplot(1, 3, 1);
|
||||
plot(t, Erx, 'DisplayName', '$\epsilon_{\theta x}$')
|
||||
ylabel('Rotation [rad]');
|
||||
legend('location', 'northeast');
|
||||
|
||||
ax2 = subplot(1, 3, 2);
|
||||
plot(t, Ery, 'DisplayName', '$\epsilon_{\theta y}$')
|
||||
xlabel('Time [s]');
|
||||
legend('location', 'northeast');
|
||||
|
||||
ax3 = subplot(1, 3, 3);
|
||||
plot(t, Erz, 'DisplayName', '$\epsilon_{\theta z}$')
|
||||
legend('location', 'northeast');
|
||||
|
||||
linkaxes([ax1,ax2,ax3],'x');
|
||||
xlim([1, inf]);
|
||||
#+end_src
|
||||
|
||||
#+begin_src matlab
|
||||
WPm = [Dxm ; Dym ; Dzm ; WSm];
|
||||
#+HEADER: :tangle no :exports results :results none :noweb yes
|
||||
#+begin_src matlab :var filepath="figs/exp_ty_scan_rot.pdf" :var figsize="full-normal" :post pdf2svg(file=*this*, ext="png")
|
||||
<<plt-matlab>>
|
||||
#+end_src
|
||||
|
||||
** Positioning Error with respect to the Granite
|
||||
The wanted position expressed with respect to the granite is ${}^WO_T$ and the measured position with respect to the granite is ${}^WO_S$, thus the *position error* expressed in $\{W\}$ is
|
||||
\[ {}^W E = {}^W O_T - {}^W O_S \]
|
||||
The same is true for rotations:
|
||||
\[ \theta_\epsilon {}^W\bm{s}_\epsilon = \theta_r {}^W\bm{s}_r - \theta_m {}^W\bm{s}_m \]
|
||||
#+NAME: fig:exp_ty_scan_rot
|
||||
#+CAPTION: X-Y-Z rotations of the sample w.r.t. granite when performing tomography experiment with no disturbances ([[./figs/exp_ty_scan_rot.png][png]], [[./figs/exp_ty_scan_rot.pdf][pdf]])
|
||||
[[file:figs/exp_ty_scan_rot.png]]
|
||||
|
||||
#+begin_src matlab
|
||||
WPe = WPr - WPm;
|
||||
#+end_src
|
||||
** Conclusion
|
||||
|
||||
#+begin_quote
|
||||
Now we want to express this error in a frame attached to the *base of the nano-hexapod* with its origin at the same point where the Jacobian of the nano-hexapod is computed (175mm above the top platform + 90mm of total height of the nano-hexapod).
|
||||
|
||||
Or maybe should we want to express this error with respect to the *top platform of the nano-hexapod*?
|
||||
We are measuring the position of the top-platform, and we don't know exactly the position of the bottom platform.
|
||||
We could compute the position of the bottom platform in two ways:
|
||||
- from the encoders of each stage
|
||||
- from the measurement of the nano-hexapod top platform + the internal metrology in the nano-hexapod (capacitive sensors e.g)
|
||||
|
||||
A third option is to say that the maximum stroke of the nano-hexapod is so small that the error should no change to much by the change of base.
|
||||
#+end_quote
|
||||
|
||||
** Position Error Expressed in the Nano-Hexapod Frame
|
||||
We now want the position error to be expressed in $\{S\}$ (the frame attach to the sample) for control:
|
||||
\[ {}^S E = {}^S T_W \cdot {}^W E \]
|
||||
|
||||
Thus we need to compute the homogeneous transformation ${}^ST_W$.
|
||||
Fortunately, this homogeneous transformation can be computed from the measurement of the sample position and orientation with respect to the granite.
|
||||
#+begin_src matlab
|
||||
Trxm = [1 0 0;
|
||||
0 cos(Rxm) -sin(Rxm);
|
||||
0 sin(Rxm) cos(Rxm)];
|
||||
Trym = [ cos(Rym) 0 sin(Rym);
|
||||
0 1 0;
|
||||
-sin(Rym) 0 cos(Rym)];
|
||||
Trzm = [cos(Rzm) -sin(Rzm) 0;
|
||||
sin(Rzm) cos(Rzm) 0;
|
||||
0 0 1];
|
||||
|
||||
STw = [[ Trym*Trxm*Trzm , [Dxm; Dym; Dzm]]; 0 0 0 1];
|
||||
#+end_src
|
||||
|
||||
Translation Error.
|
||||
#+begin_src matlab
|
||||
SEm = STw * [WPe(1:3); 0];
|
||||
SEm = SEm(1:3);
|
||||
#+end_src
|
||||
|
||||
Rotation Error.
|
||||
#+begin_src matlab
|
||||
SEr = STw * [WPe(4:6); 0];
|
||||
SEr = SEr(1:3);
|
||||
#+end_src
|
||||
|
||||
#+begin_src matlab
|
||||
Etot = [SEm ; SEr]
|
||||
#+end_src
|
||||
** Another try
|
||||
Let's denote:
|
||||
- $\{W\}$ the initial fixed frame
|
||||
- $\{R\}$ the reference frame corresponding to the wanted pose of the sample
|
||||
- $\{M\}$ the frame corresponding to the measured pose of the sample
|
||||
|
||||
We have then computed:
|
||||
- ${}^WT_R$
|
||||
- ${}^WT_M$
|
||||
|
||||
We have:
|
||||
\begin{align}
|
||||
{}^MT_R &= {}^MT_W {}^WT_R \\
|
||||
&= {}^WT_M^t {}^WT_R
|
||||
\end{align}
|
||||
|
||||
#+begin_src matlab
|
||||
MTr = STw'*Ttot;
|
||||
#+end_src
|
||||
|
||||
Position error:
|
||||
#+begin_src matlab
|
||||
MTr(1:3, 1:4)*[0; 0; 0; 1]
|
||||
#+end_src
|
||||
|
||||
Orientation error:
|
||||
#+begin_src matlab
|
||||
MTr(1:3, 1:3)
|
||||
#+end_src
|
||||
|
||||
** Verification
|
||||
How can we verify that the computation is correct?
|
||||
Options:
|
||||
- Test with simscape multi-body
|
||||
- Impose motion on each stage
|
||||
- Measure the position error w.r.t. the NASS
|
||||
- Compare with the computation
|
||||
#+begin_important
|
||||
This is logic that the main error moving is translation along the Y axis and rotation along the X axis.
|
||||
In order to reduce the errors, we can make a smoother reference path for the translation stage.
|
||||
#+end_important
|
||||
|
BIN
figs/exp_tomo_dist_rot.png
Normal file
After Width: | Height: | Size: 46 KiB |
Before Width: | Height: | Size: 80 KiB After Width: | Height: | Size: 54 KiB |
BIN
figs/exp_tomo_offset_rot.png
Normal file
After Width: | Height: | Size: 45 KiB |
BIN
figs/exp_tomo_offset_trans.png
Normal file
After Width: | Height: | Size: 56 KiB |
BIN
figs/exp_tomo_without_dist_rot.png
Normal file
After Width: | Height: | Size: 43 KiB |
Before Width: | Height: | Size: 56 KiB After Width: | Height: | Size: 40 KiB |
BIN
figs/exp_ty_scan_rot.png
Normal file
After Width: | Height: | Size: 40 KiB |
BIN
figs/exp_ty_scan_trans.png
Normal file
After Width: | Height: | Size: 45 KiB |
@ -58,21 +58,22 @@ This Matlab function is accessible [[file:../src/initializeInputs.m][here]].
|
||||
%% Default values for opts
|
||||
opts = struct( ...
|
||||
'Ts', 1e-3, ... % Sampling Frequency [s]
|
||||
'Tmax', 100, ... % Maximum simulation time [s]
|
||||
'Dy_type', 'constant', ... % Either "constant" / "triangular" / "sinusoidal"
|
||||
'Dy_amplitude', 0, ... % Amplitude of the displacement [m]
|
||||
'Dy_period', 1, ... % Period of the displacement [s]
|
||||
'Ry_type', 'constant', ... % Either "constant" / "triangular" / "sinusoidal"
|
||||
'Ry_amplitude', 0, ... % Amplitude [rad]
|
||||
'Ry_period', 10, ... % Period of the displacement [s]
|
||||
'Ry_period', 1, ... % Period of the displacement [s]
|
||||
'Rz_type', 'constant', ... % Either "constant" / "rotating"
|
||||
'Rz_amplitude', 0, ... % Initial angle [rad]
|
||||
'Rz_period', 1, ... % Period of the rotating [s]
|
||||
'Dh_type', 'constant', ... % For now, only constant is implemented
|
||||
'Dh_pos', [0; 0; 0; 0; 0; 0], ... % Initial position [m,m,m,rad,rad,rad] of the top platform (Pitch-Roll-Yaw Euler angles)
|
||||
'Dh_pos', zeros(6, 1), ... % Initial position [m,m,m,rad,rad,rad] of the top platform (Pitch-Roll-Yaw Euler angles)
|
||||
'Rm_type', 'constant', ... % For now, only constant is implemented
|
||||
'Rm_pos', [0; pi], ... % Initial position of the two masses
|
||||
'Dn_type', 'constant', ... % For now, only constant is implemented
|
||||
'Dn_pos', [0; 0; 0; 0; 0; 0] ... % Initial position [m,m,m,rad,rad,rad] of the top platform
|
||||
'Dn_pos', zeros(6,1) ... % Initial position [m,m,m,rad,rad,rad] of the top platform
|
||||
);
|
||||
|
||||
%% Populate opts with input parameters
|
||||
@ -84,56 +85,100 @@ This Matlab function is accessible [[file:../src/initializeInputs.m][here]].
|
||||
|
||||
%% Set Sampling Time
|
||||
Ts = opts.Ts;
|
||||
Tmax = opts.Tmax;
|
||||
|
||||
%% Low Pass Filter to filter out the references
|
||||
s = zpk('s');
|
||||
w0 = 2*pi*100;
|
||||
xi = 1;
|
||||
H_lpf = 1/(1 + 2*xi/w0*s + s^2/w0^2);
|
||||
|
||||
%% Translation stage - Dy
|
||||
t = 0:Ts:opts.Dy_period-Ts; % Time Vector [s]
|
||||
t = 0:Ts:Tmax; % Time Vector [s]
|
||||
Dy = zeros(length(t), 1);
|
||||
Dyd = zeros(length(t), 1);
|
||||
Dydd = zeros(length(t), 1);
|
||||
switch opts.Dy_type
|
||||
case 'constant'
|
||||
Dy(:) = opts.Dy_amplitude;
|
||||
Dyd(:) = 0;
|
||||
Dydd(:) = 0;
|
||||
case 'triangular'
|
||||
Dy(:) = -4*opts.Dy_amplitude + 4*opts.Dy_amplitude/opts.Dy_period*t;
|
||||
Dy(t<0.75*opts.Dy_period) = 2*opts.Dy_amplitude - 4*opts.Dy_amplitude/opts.Dy_period*t(t<0.75*opts.Dy_period);
|
||||
Dy(t<0.25*opts.Dy_period) = 4*opts.Dy_amplitude/opts.Dy_period*t(t<0.25*opts.Dy_period);
|
||||
% This is done to unsure that we start with no displacement
|
||||
Dy_raw = opts.Dy_amplitude*sawtooth(2*pi*t/opts.Dy_period,1/2);
|
||||
i0 = find(t>=opts.Dy_period/4,1);
|
||||
Dy(1:end-i0+1) = Dy_raw(i0:end);
|
||||
Dy(end-i0+2:end) = Dy_raw(end); % we fix the last value
|
||||
|
||||
% The signal is filtered out
|
||||
Dy = lsim(H_lpf, Dy, t);
|
||||
Dyd = lsim(H_lpf*s, Dy, t);
|
||||
Dydd = lsim(H_lpf*s^2, Dy, t);
|
||||
case 'sinusoidal'
|
||||
Dy(:) = opts.Dy_amplitude*sin(2*pi/opts.Dy_period*t);
|
||||
Dyd = opts.Dy_amplitude*2*pi/opts.Dy_period*cos(2*pi/opts.Dy_period*t);
|
||||
Dydd = -opts.Dy_amplitude*(2*pi/opts.Dy_period)^2*sin(2*pi/opts.Dy_period*t);
|
||||
otherwise
|
||||
warning('Dy_type is not set correctly');
|
||||
end
|
||||
Dy = struct('time', t, 'signals', struct('values', Dy));
|
||||
|
||||
Dy = struct('time', t, 'signals', struct('values', Dy), 'deriv', Dyd, 'dderiv', Dydd);
|
||||
|
||||
%% Tilt Stage - Ry
|
||||
t = 0:Ts:opts.Ry_period-Ts;
|
||||
t = 0:Ts:Tmax; % Time Vector [s]
|
||||
Ry = zeros(length(t), 1);
|
||||
Ryd = zeros(length(t), 1);
|
||||
Rydd = zeros(length(t), 1);
|
||||
|
||||
switch opts.Ry_type
|
||||
case 'constant'
|
||||
Ry(:) = opts.Ry_amplitude;
|
||||
Ryd(:) = 0;
|
||||
Rydd(:) = 0;
|
||||
case 'triangular'
|
||||
Ry(:) = -4*opts.Ry_amplitude + 4*opts.Ry_amplitude/opts.Ry_period*t;
|
||||
Ry(t<0.75*opts.Ry_period) = 2*opts.Ry_amplitude - 4*opts.Ry_amplitude/opts.Ry_period*t(t<0.75*opts.Ry_period);
|
||||
Ry(t<0.25*opts.Ry_period) = 4*opts.Ry_amplitude/opts.Ry_period*t(t<0.25*opts.Ry_period);
|
||||
case 'sinusoidal'
|
||||
Ry_raw = opts.Ry_amplitude*sawtooth(2*pi*t/opts.Ry_period,1/2);
|
||||
i0 = find(t>=opts.Ry_period/4,1);
|
||||
Ry(1:end-i0+1) = Ry_raw(i0:end);
|
||||
Ry(end-i0+2:end) = Ry_raw(end); % we fix the last value
|
||||
|
||||
% The signal is filtered out
|
||||
Ry = lsim(H_lpf, Ry, t);
|
||||
Ryd = lsim(H_lpf*s, Ry, t);
|
||||
Rydd = lsim(H_lpf*s^2, Ry, t);
|
||||
case 'sinusoidal'
|
||||
Ry(:) = opts.Ry_amplitude*sin(2*pi/opts.Ry_period*t);
|
||||
|
||||
Ryd = opts.Ry_amplitude*2*pi/opts.Ry_period*cos(2*pi/opts.Ry_period*t);
|
||||
Rydd = -opts.Ry_amplitude*(2*pi/opts.Ry_period)^2*sin(2*pi/opts.Ry_period*t);
|
||||
otherwise
|
||||
warning('Ry_type is not set correctly');
|
||||
end
|
||||
Ry = struct('time', t, 'signals', struct('values', Ry));
|
||||
|
||||
Ry = struct('time', t, 'signals', struct('values', Ry), 'deriv', Ryd, 'dderiv', Rydd);
|
||||
|
||||
%% Spindle - Rz
|
||||
t = 0:Ts:100*opts.Rz_period-Ts;
|
||||
t = 0:Ts:Tmax; % Time Vector [s]
|
||||
Rz = zeros(length(t), 1);
|
||||
Rzd = zeros(length(t), 1);
|
||||
Rzdd = zeros(length(t), 1);
|
||||
|
||||
switch opts.Rz_type
|
||||
case 'constant'
|
||||
Rz(:) = opts.Rz_amplitude;
|
||||
Rzd(:) = 0;
|
||||
Rzdd(:) = 0;
|
||||
case 'rotating'
|
||||
Rz(:) = opts.Rz_amplitude+2*pi/opts.Rz_period*t;
|
||||
|
||||
% The signal is filtered out
|
||||
Rz = lsim(H_lpf, Rz, t);
|
||||
Rzd = lsim(H_lpf*s, Rz, t);
|
||||
Rzdd = lsim(H_lpf*s^2, Rz, t);
|
||||
otherwise
|
||||
warning('Rz_type is not set correctly');
|
||||
end
|
||||
Rz = struct('time', t, 'signals', struct('values', Rz));
|
||||
|
||||
Rz = struct('time', t, 'signals', struct('values', Rz), 'deriv', Rzd, 'dderiv', Rzdd);
|
||||
|
||||
%% Micro-Hexapod
|
||||
t = [0, Ts];
|
||||
@ -167,11 +212,13 @@ This Matlab function is accessible [[file:../src/initializeInputs.m][here]].
|
||||
otherwise
|
||||
warning('Dh_type is not set correctly');
|
||||
end
|
||||
|
||||
Dh = struct('time', t, 'signals', struct('values', Dh));
|
||||
Dhl = struct('time', t, 'signals', struct('values', Dhl));
|
||||
|
||||
%% Axis Compensation - Rm
|
||||
t = [0, Ts];
|
||||
|
||||
Rm = [opts.Rm_pos, opts.Rm_pos];
|
||||
Rm = struct('time', t, 'signals', struct('values', Rm));
|
||||
|
||||
@ -185,6 +232,7 @@ This Matlab function is accessible [[file:../src/initializeInputs.m][here]].
|
||||
otherwise
|
||||
warning('Dn_type is not set correctly');
|
||||
end
|
||||
|
||||
Dn = struct('time', t, 'signals', struct('values', Dn));
|
||||
|
||||
%% Save
|
||||
|
@ -2,21 +2,22 @@ function [ref] = initializeReferences(opts_param)
|
||||
%% Default values for opts
|
||||
opts = struct( ...
|
||||
'Ts', 1e-3, ... % Sampling Frequency [s]
|
||||
'Tmax', 100, ... % Maximum simulation time [s]
|
||||
'Dy_type', 'constant', ... % Either "constant" / "triangular" / "sinusoidal"
|
||||
'Dy_amplitude', 0, ... % Amplitude of the displacement [m]
|
||||
'Dy_period', 1, ... % Period of the displacement [s]
|
||||
'Ry_type', 'constant', ... % Either "constant" / "triangular" / "sinusoidal"
|
||||
'Ry_amplitude', 0, ... % Amplitude [rad]
|
||||
'Ry_period', 10, ... % Period of the displacement [s]
|
||||
'Ry_period', 1, ... % Period of the displacement [s]
|
||||
'Rz_type', 'constant', ... % Either "constant" / "rotating"
|
||||
'Rz_amplitude', 0, ... % Initial angle [rad]
|
||||
'Rz_period', 1, ... % Period of the rotating [s]
|
||||
'Dh_type', 'constant', ... % For now, only constant is implemented
|
||||
'Dh_pos', [0; 0; 0; 0; 0; 0], ... % Initial position [m,m,m,rad,rad,rad] of the top platform (Pitch-Roll-Yaw Euler angles)
|
||||
'Dh_pos', zeros(6, 1), ... % Initial position [m,m,m,rad,rad,rad] of the top platform (Pitch-Roll-Yaw Euler angles)
|
||||
'Rm_type', 'constant', ... % For now, only constant is implemented
|
||||
'Rm_pos', [0; pi], ... % Initial position of the two masses
|
||||
'Dn_type', 'constant', ... % For now, only constant is implemented
|
||||
'Dn_pos', [0; 0; 0; 0; 0; 0] ... % Initial position [m,m,m,rad,rad,rad] of the top platform
|
||||
'Dn_pos', zeros(6,1) ... % Initial position [m,m,m,rad,rad,rad] of the top platform
|
||||
);
|
||||
|
||||
%% Populate opts with input parameters
|
||||
@ -28,56 +29,100 @@ function [ref] = initializeReferences(opts_param)
|
||||
|
||||
%% Set Sampling Time
|
||||
Ts = opts.Ts;
|
||||
Tmax = opts.Tmax;
|
||||
|
||||
%% Low Pass Filter to filter out the references
|
||||
s = zpk('s');
|
||||
w0 = 2*pi*100;
|
||||
xi = 1;
|
||||
H_lpf = 1/(1 + 2*xi/w0*s + s^2/w0^2);
|
||||
|
||||
%% Translation stage - Dy
|
||||
t = 0:Ts:opts.Dy_period-Ts; % Time Vector [s]
|
||||
t = 0:Ts:Tmax; % Time Vector [s]
|
||||
Dy = zeros(length(t), 1);
|
||||
Dyd = zeros(length(t), 1);
|
||||
Dydd = zeros(length(t), 1);
|
||||
switch opts.Dy_type
|
||||
case 'constant'
|
||||
Dy(:) = opts.Dy_amplitude;
|
||||
Dyd(:) = 0;
|
||||
Dydd(:) = 0;
|
||||
case 'triangular'
|
||||
Dy(:) = -4*opts.Dy_amplitude + 4*opts.Dy_amplitude/opts.Dy_period*t;
|
||||
Dy(t<0.75*opts.Dy_period) = 2*opts.Dy_amplitude - 4*opts.Dy_amplitude/opts.Dy_period*t(t<0.75*opts.Dy_period);
|
||||
Dy(t<0.25*opts.Dy_period) = 4*opts.Dy_amplitude/opts.Dy_period*t(t<0.25*opts.Dy_period);
|
||||
% This is done to unsure that we start with no displacement
|
||||
Dy_raw = opts.Dy_amplitude*sawtooth(2*pi*t/opts.Dy_period,1/2);
|
||||
i0 = find(t>=opts.Dy_period/4,1);
|
||||
Dy(1:end-i0+1) = Dy_raw(i0:end);
|
||||
Dy(end-i0+2:end) = Dy_raw(end); % we fix the last value
|
||||
|
||||
% The signal is filtered out
|
||||
Dy = lsim(H_lpf, Dy, t);
|
||||
Dyd = lsim(H_lpf*s, Dy, t);
|
||||
Dydd = lsim(H_lpf*s^2, Dy, t);
|
||||
case 'sinusoidal'
|
||||
Dy(:) = opts.Dy_amplitude*sin(2*pi/opts.Dy_period*t);
|
||||
Dyd = opts.Dy_amplitude*2*pi/opts.Dy_period*cos(2*pi/opts.Dy_period*t);
|
||||
Dydd = -opts.Dy_amplitude*(2*pi/opts.Dy_period)^2*sin(2*pi/opts.Dy_period*t);
|
||||
otherwise
|
||||
warning('Dy_type is not set correctly');
|
||||
end
|
||||
Dy = struct('time', t, 'signals', struct('values', Dy));
|
||||
|
||||
Dy = struct('time', t, 'signals', struct('values', Dy), 'deriv', Dyd, 'dderiv', Dydd);
|
||||
|
||||
%% Tilt Stage - Ry
|
||||
t = 0:Ts:opts.Ry_period-Ts;
|
||||
t = 0:Ts:Tmax; % Time Vector [s]
|
||||
Ry = zeros(length(t), 1);
|
||||
Ryd = zeros(length(t), 1);
|
||||
Rydd = zeros(length(t), 1);
|
||||
|
||||
switch opts.Ry_type
|
||||
case 'constant'
|
||||
Ry(:) = opts.Ry_amplitude;
|
||||
Ryd(:) = 0;
|
||||
Rydd(:) = 0;
|
||||
case 'triangular'
|
||||
Ry(:) = -4*opts.Ry_amplitude + 4*opts.Ry_amplitude/opts.Ry_period*t;
|
||||
Ry(t<0.75*opts.Ry_period) = 2*opts.Ry_amplitude - 4*opts.Ry_amplitude/opts.Ry_period*t(t<0.75*opts.Ry_period);
|
||||
Ry(t<0.25*opts.Ry_period) = 4*opts.Ry_amplitude/opts.Ry_period*t(t<0.25*opts.Ry_period);
|
||||
case 'sinusoidal'
|
||||
Ry_raw = opts.Ry_amplitude*sawtooth(2*pi*t/opts.Ry_period,1/2);
|
||||
i0 = find(t>=opts.Ry_period/4,1);
|
||||
Ry(1:end-i0+1) = Ry_raw(i0:end);
|
||||
Ry(end-i0+2:end) = Ry_raw(end); % we fix the last value
|
||||
|
||||
% The signal is filtered out
|
||||
Ry = lsim(H_lpf, Ry, t);
|
||||
Ryd = lsim(H_lpf*s, Ry, t);
|
||||
Rydd = lsim(H_lpf*s^2, Ry, t);
|
||||
case 'sinusoidal'
|
||||
Ry(:) = opts.Ry_amplitude*sin(2*pi/opts.Ry_period*t);
|
||||
|
||||
Ryd = opts.Ry_amplitude*2*pi/opts.Ry_period*cos(2*pi/opts.Ry_period*t);
|
||||
Rydd = -opts.Ry_amplitude*(2*pi/opts.Ry_period)^2*sin(2*pi/opts.Ry_period*t);
|
||||
otherwise
|
||||
warning('Ry_type is not set correctly');
|
||||
end
|
||||
Ry = struct('time', t, 'signals', struct('values', Ry));
|
||||
|
||||
Ry = struct('time', t, 'signals', struct('values', Ry), 'deriv', Ryd, 'dderiv', Rydd);
|
||||
|
||||
%% Spindle - Rz
|
||||
t = 0:Ts:100*opts.Rz_period-Ts;
|
||||
t = 0:Ts:Tmax; % Time Vector [s]
|
||||
Rz = zeros(length(t), 1);
|
||||
Rzd = zeros(length(t), 1);
|
||||
Rzdd = zeros(length(t), 1);
|
||||
|
||||
switch opts.Rz_type
|
||||
case 'constant'
|
||||
Rz(:) = opts.Rz_amplitude;
|
||||
Rzd(:) = 0;
|
||||
Rzdd(:) = 0;
|
||||
case 'rotating'
|
||||
Rz(:) = opts.Rz_amplitude+2*pi/opts.Rz_period*t;
|
||||
|
||||
% The signal is filtered out
|
||||
Rz = lsim(H_lpf, Rz, t);
|
||||
Rzd = lsim(H_lpf*s, Rz, t);
|
||||
Rzdd = lsim(H_lpf*s^2, Rz, t);
|
||||
otherwise
|
||||
warning('Rz_type is not set correctly');
|
||||
end
|
||||
Rz = struct('time', t, 'signals', struct('values', Rz));
|
||||
|
||||
Rz = struct('time', t, 'signals', struct('values', Rz), 'deriv', Rzd, 'dderiv', Rzdd);
|
||||
|
||||
%% Micro-Hexapod
|
||||
t = [0, Ts];
|
||||
@ -111,11 +156,13 @@ function [ref] = initializeReferences(opts_param)
|
||||
otherwise
|
||||
warning('Dh_type is not set correctly');
|
||||
end
|
||||
|
||||
Dh = struct('time', t, 'signals', struct('values', Dh));
|
||||
Dhl = struct('time', t, 'signals', struct('values', Dhl));
|
||||
|
||||
%% Axis Compensation - Rm
|
||||
t = [0, Ts];
|
||||
|
||||
Rm = [opts.Rm_pos, opts.Rm_pos];
|
||||
Rm = struct('time', t, 'signals', struct('values', Rm));
|
||||
|
||||
@ -129,6 +176,7 @@ function [ref] = initializeReferences(opts_param)
|
||||
otherwise
|
||||
warning('Dn_type is not set correctly');
|
||||
end
|
||||
|
||||
Dn = struct('time', t, 'signals', struct('values', Dn));
|
||||
|
||||
%% Save
|
||||
|