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</div><div id="content">
<h1 class="title">Identification</h1>
<div id="table-of-contents">
<h2>Table of Contents</h2>
<div id="text-table-of-contents">
<ul>
<li><a href="#org58012af">1. Identification of the micro-station</a></li>
<li><a href="#org79bdd57">2. Plot the obtained transfer functions</a></li>
<li><a href="#org8c2b5ae">3. Compare with the modal measurements</a></li>
<li><a href="#org77edab0">4. Modal Identification of the micro station</a></li>
</ul>
</div>
</div>
<p>
The goal here is to make an identification of the micro-station in order to compare the model with the measurements on the real micro-station.
</p>
<p>
In order to do so:
</p>
<ul class="org-ul">
<li>Decide where to virtually excite the station and where to measure its motion</li>
<li>Extract transfer functions from the excitation forces to the measured motion</li>
<li>Compare those transfer functions with the modal analysis</li>
</ul>
<p>
For the excitation, we can choose the same excitation points as the one used for the modal test.
For the measurement points, we can choose the Center of Mass of each solid body.
The center of mass of each solid body is not easily defined using Simscape.
Indeed, we can define the center of mass of any solid body but not of multiple solid bodies. However, one solid body is composed of multiple STEP files.
One solution could be to use one STEP file for one solid body.
However, the position of the center of mass can be exported using simulink and then defined on Simscape.
</p>
<div class="note">
<p>
All the files (data and Matlab scripts) are accessible <a href="data/identification_micro_station.zip">here</a>.
</p>
</div>
<div id="outline-container-org58012af" class="outline-2">
<h2 id="org58012af"><span class="section-number-2">1</span> Identification of the micro-station</h2>
<div class="outline-text-2" id="text-1">
<div class="org-src-container">
<pre class="src src-matlab">simulinkproject<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'../'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
</pre>
</div>
<div class="org-src-container">
<pre class="src src-matlab">open sim_micro_station_id.slx
</pre>
</div>
</div>
</div>
<div id="outline-container-org79bdd57" class="outline-2">
<h2 id="org79bdd57"><span class="section-number-2">2</span> Plot the obtained transfer functions</h2>
</div>
<div id="outline-container-org8c2b5ae" class="outline-2">
<h2 id="org8c2b5ae"><span class="section-number-2">3</span> Compare with the modal measurements</h2>
</div>
<div id="outline-container-org77edab0" class="outline-2">
<h2 id="org77edab0"><span class="section-number-2">4</span> Modal Identification of the micro station</h2>
</div>
</div>
<div id="postamble" class="status">
<p class="author">Author: Dehaeze Thomas</p>
<p class="date">Created: 2019-10-08 mar. 11:13</p>
<p class="validation"><a href="http://validator.w3.org/check?uri=referer">Validate</a></p>
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