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<title>Measurements</title> <title>Measurements</title>
<meta name="generator" content="Org mode" /> <meta name="generator" content="Org mode" />
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<link rel="stylesheet" type="text/css" href="../css/htmlize.css"/> <link rel="stylesheet" type="text/css" href="../css/htmlize.css"/>
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@ -247,53 +248,97 @@ for the JavaScript code in this tag.
</script> </script>
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<body> <body>
<div id="content"> <div id="org-div-home-and-up">
<a accesskey="h" href="../index.html"> UP </a>
|
<a accesskey="H" href="../index.html"> HOME </a>
</div><div id="content">
<h1 class="title">Measurements</h1> <h1 class="title">Measurements</h1>
<div id="table-of-contents"> <div id="table-of-contents">
<h2>Table of Contents</h2> <h2>Table of Contents</h2>
<div id="text-table-of-contents"> <div id="text-table-of-contents">
<ul> <ul>
<li><a href="#org2e8dc82">1. Experimental conditions</a></li> <li><a href="#orgb9e4bbf">1. Experimental conditions</a></li>
<li><a href="#org2f1a089">2. Measurements procedure</a></li> <li><a href="#orgbe7bf59">2. Measurements procedure</a></li>
<li><a href="#orgcb92a24">3. Measurement Files</a></li> <li><a href="#org3337380">3. Measurement Files</a></li>
<li><a href="#orgad05307">4. Data Analysis</a> <li><a href="#orgc59cdd1">4. Data Analysis</a>
<ul> <ul>
<li><a href="#org28e779a">4.1. Loading of the data</a></li> <li><a href="#org97ea2b9">4.1. Loading of the data</a></li>
<li><a href="#orgf5d9ddc">4.2. Pre-processing of the data</a></li> <li><a href="#org55d35ad">4.2. Pre-processing of the data</a></li>
<li><a href="#orgf90fc5f">4.3. X-direction FRF</a></li> <li><a href="#org409f95e">4.3. X-direction FRF</a></li>
<li><a href="#orgec13f33">4.4. Y-direction FRF</a></li> <li><a href="#org5ca4365">4.4. Y-direction FRF</a></li>
<li><a href="#org0696fe4">4.5. Z-direction FRF</a></li> <li><a href="#org491a242">4.5. Z-direction FRF</a></li>
</ul> </ul>
</li> </li>
<li><a href="#orgf03bfb4">5. Results</a></li>
</ul> </ul>
</div> </div>
</div> </div>
<div id="outline-container-orgb9e4bbf" class="outline-2">
<h2 id="orgb9e4bbf"><span class="section-number-2">1</span> Experimental conditions</h2>
<div class="outline-text-2" id="text-1">
<table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<colgroup>
<col class="org-left" />
<col class="org-left" />
</colgroup>
<tbody>
<tr>
<td class="org-left"><b>Date</b></td>
<td class="org-left">2017-11-17</td>
</tr>
<tr>
<td class="org-left"><b>Sensors</b></td>
<td class="org-left">Accelerometers</td>
</tr>
<tr>
<td class="org-left"><b>Excitation</b></td>
<td class="org-left">Instrumented Hammer</td>
</tr>
<tr>
<td class="org-left"><b>Location</b></td>
<td class="org-left">Laboratory</td>
</tr>
</tbody>
</table>
<p> <p>
<a href="../index.html">Back to main page</a>. Dynamics of the station is evaluated using instrumented hammer and accelerometers fixed on each stage.
</p> </p>
<div id="outline-container-org2e8dc82" class="outline-2"> <p>
<h2 id="org2e8dc82"><span class="section-number-2">1</span> Experimental conditions</h2> <b>Goal</b>:
<div class="outline-text-2" id="text-1"> </p>
<ul class="org-ul">
<li>Obtain a first estimation of resonance frequencies</li>
</ul>
<ul class="org-ul"> <ul class="org-ul">
<li>Measurement made in a metrology lab</li> <li>Measurement made in a metrology lab</li>
<li>The granite is not glued to the floor</li> <li>The granite is not glued to the floor</li>
<li>The Y-Translation stage is powered and in closed-loop</li> <li>The Y-Translation stage is powered and in closed-loop</li>
<li>The spindle is not powered</li> <li>The spindle is not powered</li>
<li>Mass is placed on top of the Hexapod (<b>how much?</b>) (figure <a href="#orge067538">1</a>).</li> <li>Mass is placed on top of the Hexapod (<b>how much?</b>) (figure <a href="#orgb5022d9">1</a>).</li>
<li>Made by Marc Lesourd on the 17th of November 2017</li> <li>Made by Marc Lesourd on the 17th of November 2017</li>
</ul> </ul>
<div id="orge067538" class="figure"> <div id="orgb5022d9" class="figure">
<p><img src="./figs/accelerometers.png" alt="accelerometers.png" width="500px" /> <p><img src="./figs/accelerometers.png" alt="accelerometers.png" width="500px" />
</p> </p>
<p><span class="figure-number">Figure 1: </span>Accelerometers position</p> <p><span class="figure-number">Figure 1: </span>Accelerometers position</p>
</div> </div>
<div id="org737c3b9" class="figure"> <div id="orgaaf63dd" class="figure">
<p><img src="./figs/instrumented_hammer.png" alt="instrumented_hammer.png" width="500px" /> <p><img src="./figs/instrumented_hammer.png" alt="instrumented_hammer.png" width="500px" />
</p> </p>
<p><span class="figure-number">Figure 2: </span>Instrumented Hammer used</p> <p><span class="figure-number">Figure 2: </span>Instrumented Hammer used</p>
@ -301,11 +346,11 @@ for the JavaScript code in this tag.
</div> </div>
</div> </div>
<div id="outline-container-org2f1a089" class="outline-2"> <div id="outline-container-orgbe7bf59" class="outline-2">
<h2 id="org2f1a089"><span class="section-number-2">2</span> Measurements procedure</h2> <h2 id="orgbe7bf59"><span class="section-number-2">2</span> Measurements procedure</h2>
<div class="outline-text-2" id="text-2"> <div class="outline-text-2" id="text-2">
<p> <p>
<b>3-axis Accelerometers</b> (specifications table <a href="#org7e5f9c1">1</a>) are glued on (see figure <a href="#orge067538">1</a>): <b>3-axis Accelerometers</b> (specifications table <a href="#org2f4877d">1</a>) are glued on (see figure <a href="#orgb5022d9">1</a>):
</p> </p>
<ul class="org-ul"> <ul class="org-ul">
<li>Marble</li> <li>Marble</li>
@ -314,7 +359,7 @@ for the JavaScript code in this tag.
<li>top of Hexapod</li> <li>top of Hexapod</li>
</ul> </ul>
<table id="org7e5f9c1" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides"> <table id="org2f4877d" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<caption class="t-above"><span class="table-number">Table 1:</span> Pieozoelectric acc. 356b18 - 3 axis</caption> <caption class="t-above"><span class="table-number">Table 1:</span> Pieozoelectric acc. 356b18 - 3 axis</caption>
<colgroup> <colgroup>
@ -351,7 +396,7 @@ for the JavaScript code in this tag.
</table> </table>
<p> <p>
The structure is excited using an <b>instrumented hammer</b> with impacts on (see figure <a href="#org737c3b9">2</a>): The structure is excited using an <b>instrumented hammer</b> with impacts on (see figure <a href="#orgaaf63dd">2</a>):
</p> </p>
<ul class="org-ul"> <ul class="org-ul">
<li>Marble</li> <li>Marble</li>
@ -360,8 +405,8 @@ The structure is excited using an <b>instrumented hammer</b> with impacts on (se
</div> </div>
</div> </div>
<div id="outline-container-orgcb92a24" class="outline-2"> <div id="outline-container-org3337380" class="outline-2">
<h2 id="orgcb92a24"><span class="section-number-2">3</span> Measurement Files</h2> <h2 id="org3337380"><span class="section-number-2">3</span> Measurement Files</h2>
<div class="outline-text-2" id="text-3"> <div class="outline-text-2" id="text-3">
<p> <p>
Two measurements files are: Two measurements files are:
@ -370,7 +415,7 @@ Two measurements files are:
<li><code>id31_microstation_2017_11_17_frf.mat</code> that contains: <li><code>id31_microstation_2017_11_17_frf.mat</code> that contains:
<ul class="org-ul"> <ul class="org-ul">
<li><code>freq_frf</code> the frequency vector in Hz</li> <li><code>freq_frf</code> the frequency vector in Hz</li>
<li>Computed frequency response functions (see table <a href="#orgc7a9cf7">2</a>)</li> <li>Computed frequency response functions (see table <a href="#org71ee83c">2</a>)</li>
</ul></li> </ul></li>
<li><code>id31_microstation_2017_11_17_coh.mat</code> <li><code>id31_microstation_2017_11_17_coh.mat</code>
<ul class="org-ul"> <ul class="org-ul">
@ -379,10 +424,10 @@ Two measurements files are:
</ul> </ul>
<p> <p>
For each of the measurement, the measured channels are shown on table <a href="#org4e93508">3</a>. For each of the measurement, the measured channels are shown on table <a href="#org1bf8383">3</a>.
</p> </p>
<table id="orgc7a9cf7" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides"> <table id="org71ee83c" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<caption class="t-above"><span class="table-number">Table 2:</span> Description of the location of direction of the excitation for each measurement</caption> <caption class="t-above"><span class="table-number">Table 2:</span> Description of the location of direction of the excitation for each measurement</caption>
<colgroup> <colgroup>
@ -438,7 +483,7 @@ For each of the measurement, the measured channels are shown on table <a href="#
</tbody> </tbody>
</table> </table>
<table id="org4e93508" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides"> <table id="org1bf8383" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<caption class="t-above"><span class="table-number">Table 3:</span> Description of each measurement channel</caption> <caption class="t-above"><span class="table-number">Table 3:</span> Description of each measurement channel</caption>
<colgroup> <colgroup>
@ -554,12 +599,12 @@ For each of the measurement, the measured channels are shown on table <a href="#
</div> </div>
</div> </div>
<div id="outline-container-orgad05307" class="outline-2"> <div id="outline-container-orgc59cdd1" class="outline-2">
<h2 id="orgad05307"><span class="section-number-2">4</span> Data Analysis</h2> <h2 id="orgc59cdd1"><span class="section-number-2">4</span> Data Analysis</h2>
<div class="outline-text-2" id="text-4"> <div class="outline-text-2" id="text-4">
</div> </div>
<div id="outline-container-org28e779a" class="outline-3"> <div id="outline-container-org97ea2b9" class="outline-3">
<h3 id="org28e779a"><span class="section-number-3">4.1</span> Loading of the data</h3> <h3 id="org97ea2b9"><span class="section-number-3">4.1</span> Loading of the data</h3>
<div class="outline-text-3" id="text-4-1"> <div class="outline-text-3" id="text-4-1">
<div class="org-src-container"> <div class="org-src-container">
<pre class="src src-matlab">load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./raw_data/id31_microstation_2017_11_17_coh.mat'</span>,<span class="org-underline">...</span> <pre class="src src-matlab">load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./raw_data/id31_microstation_2017_11_17_coh.mat'</span>,<span class="org-underline">...</span>
@ -583,8 +628,8 @@ load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string
</div> </div>
</div> </div>
<div id="outline-container-orgf5d9ddc" class="outline-3"> <div id="outline-container-org55d35ad" class="outline-3">
<h3 id="orgf5d9ddc"><span class="section-number-3">4.2</span> Pre-processing of the data</h3> <h3 id="org55d35ad"><span class="section-number-3">4.2</span> Pre-processing of the data</h3>
<div class="outline-text-3" id="text-4-2"> <div class="outline-text-3" id="text-4-2">
<p> <p>
The FRF data are scaled with the sensitivity of the accelerometer and integrated two times to have the displacement instead of the acceleration. The FRF data are scaled with the sensitivity of the accelerometer and integrated two times to have the displacement instead of the acceleration.
@ -606,11 +651,11 @@ frf_marble_z = <span class="org-type">-</span><span class="org-highlight-numbers
</div> </div>
</div> </div>
<div id="outline-container-orgf90fc5f" class="outline-3"> <div id="outline-container-org409f95e" class="outline-3">
<h3 id="orgf90fc5f"><span class="section-number-3">4.3</span> X-direction FRF</h3> <h3 id="org409f95e"><span class="section-number-3">4.3</span> X-direction FRF</h3>
<div class="outline-text-3" id="text-4-3"> <div class="outline-text-3" id="text-4-3">
<div id="org7ea5cb4" class="figure"> <div id="org5d69ec3" class="figure">
<p><img src="figs/marble_x_frf.png" alt="marble_x_frf.png" /> <p><img src="figs/marble_x_frf.png" alt="marble_x_frf.png" />
</p> </p>
<p><span class="figure-number">Figure 3: </span>Response to a force applied on the marble in the X direction</p> <p><span class="figure-number">Figure 3: </span>Response to a force applied on the marble in the X direction</p>
@ -618,7 +663,7 @@ frf_marble_z = <span class="org-type">-</span><span class="org-highlight-numbers
<div id="org55645ce" class="figure"> <div id="orgf472153" class="figure">
<p><img src="figs/hexa_x_frf.png" alt="hexa_x_frf.png" /> <p><img src="figs/hexa_x_frf.png" alt="hexa_x_frf.png" />
</p> </p>
<p><span class="figure-number">Figure 4: </span>Response to a force applied on the hexa in the X direction</p> <p><span class="figure-number">Figure 4: </span>Response to a force applied on the hexa in the X direction</p>
@ -626,18 +671,18 @@ frf_marble_z = <span class="org-type">-</span><span class="org-highlight-numbers
</div> </div>
</div> </div>
<div id="outline-container-orgec13f33" class="outline-3"> <div id="outline-container-org5ca4365" class="outline-3">
<h3 id="orgec13f33"><span class="section-number-3">4.4</span> Y-direction FRF</h3> <h3 id="org5ca4365"><span class="section-number-3">4.4</span> Y-direction FRF</h3>
<div class="outline-text-3" id="text-4-4"> <div class="outline-text-3" id="text-4-4">
<div id="org8de99f7" class="figure"> <div id="org8581a20" class="figure">
<p><img src="figs/marble_y_frf.png" alt="marble_y_frf.png" /> <p><img src="figs/marble_y_frf.png" alt="marble_y_frf.png" />
</p> </p>
<p><span class="figure-number">Figure 5: </span>Response to a force applied on the marble in the Y direction</p> <p><span class="figure-number">Figure 5: </span>Response to a force applied on the marble in the Y direction</p>
</div> </div>
<div id="org8506d1b" class="figure"> <div id="orgdea2e62" class="figure">
<p><img src="figs/hexa_y_frf.png" alt="hexa_y_frf.png" /> <p><img src="figs/hexa_y_frf.png" alt="hexa_y_frf.png" />
</p> </p>
<p><span class="figure-number">Figure 6: </span>Response to a force applied on the hexa in the Y direction</p> <p><span class="figure-number">Figure 6: </span>Response to a force applied on the hexa in the Y direction</p>
@ -645,29 +690,42 @@ frf_marble_z = <span class="org-type">-</span><span class="org-highlight-numbers
</div> </div>
</div> </div>
<div id="outline-container-org0696fe4" class="outline-3"> <div id="outline-container-org491a242" class="outline-3">
<h3 id="org0696fe4"><span class="section-number-3">4.5</span> Z-direction FRF</h3> <h3 id="org491a242"><span class="section-number-3">4.5</span> Z-direction FRF</h3>
<div class="outline-text-3" id="text-4-5"> <div class="outline-text-3" id="text-4-5">
<div id="orgb151cf9" class="figure"> <div id="org525b297" class="figure">
<p><img src="figs/marble_z_frf.png" alt="marble_z_frf.png" /> <p><img src="figs/marble_z_frf.png" alt="marble_z_frf.png" />
</p> </p>
<p><span class="figure-number">Figure 7: </span>Response to a force applied on the marble in the Z direction</p> <p><span class="figure-number">Figure 7: </span>Response to a force applied on the marble in the Z direction</p>
</div> </div>
<div id="orgfa78f3b" class="figure"> <div id="orgf376c05" class="figure">
<p><img src="figs/hexa_z_frf.png" alt="hexa_z_frf.png" /> <p><img src="figs/hexa_z_frf.png" alt="hexa_z_frf.png" />
</p> </p>
<p><span class="figure-number">Figure 8: </span>Response to a force applied on the hexa in the Z direction</p> <p><span class="figure-number">Figure 8: </span>Response to a force applied on the hexa in the Z direction</p>
</div> </div>
</div>
</div>
</div>
<div id="outline-container-orgf03bfb4" class="outline-2">
<h2 id="orgf03bfb4"><span class="section-number-2">5</span> Results</h2>
<div class="outline-text-2" id="text-5">
<div class="important">
<ul class="org-ul">
<li>Resonances have been identified at 45Hz and 75Hz</li>
<li>However, the quality of the measurements are bad at low frequency</li>
<li>New measurements should be done with Geophones</li>
</ul>
</div> </div>
</div> </div>
</div> </div>
</div> </div>
<div id="postamble" class="status"> <div id="postamble" class="status">
<p class="author">Author: Thomas Dehaeze</p> <p class="author">Author: Dehaeze Thomas</p>
<p class="date">Created: 2019-05-10 ven. 09:46</p> <p class="date">Created: 2019-05-14 mar. 23:06</p>
<p class="validation"><a href="http://validator.w3.org/check?uri=referer">Validate</a></p> <p class="validation"><a href="http://validator.w3.org/check?uri=referer">Validate</a></p>
</div> </div>
</body> </body>

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@ -30,6 +30,18 @@
:END: :END:
* Experimental conditions * Experimental conditions
| *Date* | 2017-11-17 |
| *Sensors* | Accelerometers |
| *Excitation* | Instrumented Hammer |
| *Location* | Laboratory |
Dynamics of the station is evaluated using instrumented hammer and accelerometers fixed on each stage.
*Goal*:
- Obtain a first estimation of resonance frequencies
- Measurement made in a metrology lab - Measurement made in a metrology lab
- The granite is not glued to the floor - The granite is not glued to the floor
- The Y-Translation stage is powered and in closed-loop - The Y-Translation stage is powered and in closed-loop
@ -303,3 +315,9 @@ The FRF data are scaled with the sensitivity of the accelerometer and integrated
#+CAPTION: Response to a force applied on the hexa in the Z direction #+CAPTION: Response to a force applied on the hexa in the Z direction
#+RESULTS: fig:hexa_z_frf #+RESULTS: fig:hexa_z_frf
[[file:figs/hexa_z_frf.png]] [[file:figs/hexa_z_frf.png]]
* Results
#+begin_important
- Resonances have been identified at 45Hz and 75Hz
- However, the quality of the measurements are bad at low frequency
- New measurements should be done with Geophones
#+end_important

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<h1 class="title">Measurements</h1> <h1 class="title">Measurements</h1>
<div id="table-of-contents"> <div id="table-of-contents">
<h2>Table of Contents</h2> <h2>Table of Contents</h2>
<div id="text-table-of-contents"> <div id="text-table-of-contents">
<ul> <ul>
<li><a href="#orga614698">1. Experimental conditions</a></li> <li><a href="#org27cbd90">1. Experimental conditions</a></li>
<li><a href="#org5acf69f">2. Measurements procedure</a></li> <li><a href="#orgf2bb684">2. Measurements procedure</a></li>
<li><a href="#orge8576dc">3. Measurement Channels</a></li> <li><a href="#org604de72">3. Measurement Channels</a></li>
<li><a href="#org2abc3a7">4. Experiments</a></li> <li><a href="#orgee6f009">4. Experiments</a></li>
<li><a href="#org4e35b4e">5. Data Analysis</a> <li><a href="#orgc91528e">5. Data Analysis</a>
<ul> <ul>
<li><a href="#orgaf82586">5.1. Loading and pre-processing of the data</a></li> <li><a href="#org64c9d55">5.1. Loading and pre-processing of the data</a></li>
<li><a href="#orgc8844c5">5.2. X-direction FRF</a></li> <li><a href="#org528d8bd">5.2. X-direction FRF</a></li>
<li><a href="#orgcf9ba27">5.3. Y-direction FRF</a></li> <li><a href="#orgb043f14">5.3. Y-direction FRF</a></li>
<li><a href="#org482e0e7">5.4. Z-direction FRF</a></li> <li><a href="#org63f36f4">5.4. Z-direction FRF</a></li>
<li><a href="#org9fd4cff">5.5. Save the processed data</a></li>
</ul> </ul>
</li> </li>
<li><a href="#orge5ef1a0">6. Results</a></li>
</ul> </ul>
</div> </div>
</div> </div>
<p> <div id="outline-container-org27cbd90" class="outline-2">
<a href="../index.html">Back to main page</a>. <h2 id="org27cbd90"><span class="section-number-2">1</span> Experimental conditions</h2>
</p>
<div id="outline-container-orga614698" class="outline-2">
<h2 id="orga614698"><span class="section-number-2">1</span> Experimental conditions</h2>
<div class="outline-text-2" id="text-1"> <div class="outline-text-2" id="text-1">
<table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<colgroup>
<col class="org-left" />
<col class="org-left" />
</colgroup>
<tbody>
<tr>
<td class="org-left"><b>Date</b></td>
<td class="org-left">2018-01-12</td>
</tr>
<tr>
<td class="org-left"><b>Sensors</b></td>
<td class="org-left">Geophones</td>
</tr>
<tr>
<td class="org-left"><b>Excitation</b></td>
<td class="org-left">Instrumented Hammer</td>
</tr>
<tr>
<td class="org-left"><b>Location</b></td>
<td class="org-left">Laboratory</td>
</tr>
<tr>
<td class="org-left"><b>Notes</b></td>
<td class="org-left">Unglued Granite</td>
</tr>
</tbody>
</table>
<ul class="org-ul"> <ul class="org-ul">
<li>The granite is not glued to the floor</li> <li>The granite is not glued to the floor</li>
<li>FS = 512Hz</li> <li>FS = 512Hz</li>
<li>Made by Marc Lesourd on the 12 of January 2018</li> <li>Made by Marc Lesourd on the 12 of January 2018</li>
</ul> </ul>
<p>
<b>Goal</b>:
Obtain better coherence at low frequency.
</p>
</div> </div>
</div> </div>
<div id="outline-container-org5acf69f" class="outline-2"> <div id="outline-container-orgf2bb684" class="outline-2">
<h2 id="org5acf69f"><span class="section-number-2">2</span> Measurements procedure</h2> <h2 id="orgf2bb684"><span class="section-number-2">2</span> Measurements procedure</h2>
<div class="outline-text-2" id="text-2"> <div class="outline-text-2" id="text-2">
<p> <p>
<b>Geophones</b> <b>Geophones</b>
L-28LB geophones (table <a href="#org3345ea9">1</a>) are placed on L-28LB geophones (table <a href="#org27c9f01">1</a>) are placed on
</p> </p>
<ul class="org-ul"> <ul class="org-ul">
<li>Marle</li> <li>Marle</li>
@ -297,7 +341,7 @@ L-28LB geophones (table <a href="#org3345ea9">1</a>) are placed on
<li>Top of Hexapod</li> <li>Top of Hexapod</li>
</ul> </ul>
<table id="org3345ea9" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides"> <table id="org27c9f01" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<caption class="t-above"><span class="table-number">Table 1:</span> L-28LB Geophone characteristics</caption> <caption class="t-above"><span class="table-number">Table 1:</span> L-28LB Geophone characteristics</caption>
<colgroup> <colgroup>
@ -333,10 +377,10 @@ The structure is excited using an <b>instrumented hammer</b> with impacts on
</div> </div>
</div> </div>
<div id="outline-container-orge8576dc" class="outline-2"> <div id="outline-container-org604de72" class="outline-2">
<h2 id="orge8576dc"><span class="section-number-2">3</span> Measurement Channels</h2> <h2 id="org604de72"><span class="section-number-2">3</span> Measurement Channels</h2>
<div class="outline-text-2" id="text-3"> <div class="outline-text-2" id="text-3">
<table id="org462ede7" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides"> <table id="org98c14df" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<caption class="t-above"><span class="table-number">Table 2:</span> Description of each measurement channel</caption> <caption class="t-above"><span class="table-number">Table 2:</span> Description of each measurement channel</caption>
<colgroup> <colgroup>
@ -390,10 +434,10 @@ The structure is excited using an <b>instrumented hammer</b> with impacts on
</div> </div>
</div> </div>
<div id="outline-container-org2abc3a7" class="outline-2"> <div id="outline-container-orgee6f009" class="outline-2">
<h2 id="org2abc3a7"><span class="section-number-2">4</span> Experiments</h2> <h2 id="orgee6f009"><span class="section-number-2">4</span> Experiments</h2>
<div class="outline-text-2" id="text-4"> <div class="outline-text-2" id="text-4">
<table id="orgf9904be" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides"> <table id="orgd57c63a" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<caption class="t-above"><span class="table-number">Table 3:</span> Description of the location of direction of the excitation for each measurement</caption> <caption class="t-above"><span class="table-number">Table 3:</span> Description of the location of direction of the excitation for each measurement</caption>
<colgroup> <colgroup>
@ -453,12 +497,12 @@ The structure is excited using an <b>instrumented hammer</b> with impacts on
</div> </div>
</div> </div>
<div id="outline-container-org4e35b4e" class="outline-2"> <div id="outline-container-orgc91528e" class="outline-2">
<h2 id="org4e35b4e"><span class="section-number-2">5</span> Data Analysis</h2> <h2 id="orgc91528e"><span class="section-number-2">5</span> Data Analysis</h2>
<div class="outline-text-2" id="text-5"> <div class="outline-text-2" id="text-5">
</div> </div>
<div id="outline-container-orgaf82586" class="outline-3"> <div id="outline-container-org64c9d55" class="outline-3">
<h3 id="orgaf82586"><span class="section-number-3">5.1</span> Loading and pre-processing of the data</h3> <h3 id="org64c9d55"><span class="section-number-3">5.1</span> Loading and pre-processing of the data</h3>
<div class="outline-text-3" id="text-5-1"> <div class="outline-text-3" id="text-5-1">
<p> <p>
The Geophone sensitivity is defined below: The Geophone sensitivity is defined below:
@ -467,7 +511,7 @@ The Geophone sensitivity is defined below:
<pre class="src src-matlab">w0 = <span class="org-highlight-numbers-number">4</span>.<span class="org-highlight-numbers-number">5</span><span class="org-type">*</span><span class="org-highlight-numbers-number">2</span><span class="org-type">*</span><span class="org-constant">pi</span>; <span class="org-comment">% [rad/s]</span> <pre class="src src-matlab">w0 = <span class="org-highlight-numbers-number">4</span>.<span class="org-highlight-numbers-number">5</span><span class="org-type">*</span><span class="org-highlight-numbers-number">2</span><span class="org-type">*</span><span class="org-constant">pi</span>; <span class="org-comment">% [rad/s]</span>
ksi = <span class="org-highlight-numbers-number">0</span>.<span class="org-highlight-numbers-number">38</span>; ksi = <span class="org-highlight-numbers-number">0</span>.<span class="org-highlight-numbers-number">38</span>;
G0 = <span class="org-highlight-numbers-number">31</span>.<span class="org-highlight-numbers-number">3</span>; <span class="org-comment">% [V/(m/s)]</span> G0 = <span class="org-highlight-numbers-number">31</span>.<span class="org-highlight-numbers-number">3</span>; <span class="org-comment">% [V/(m/s)]</span>
[Omitted long matching line] G = G0<span class="org-type">*</span><span class="org-rainbow-delimiters-depth-1">(</span>s<span class="org-type">/</span>w0<span class="org-rainbow-delimiters-depth-1">)</span><span class="org-type">^</span><span class="org-highlight-numbers-number">2</span><span class="org-type">/</span><span class="org-rainbow-delimiters-depth-1">(</span><span class="org-rainbow-delimiters-depth-2">(</span>s<span class="org-type">/</span>w0<span class="org-rainbow-delimiters-depth-2">)</span><span class="org-type">^</span><span class="org-highlight-numbers-number">2</span> <span class="org-type">+</span> <span class="org-highlight-numbers-number">2</span><span class="org-type">*</span>ksi<span class="org-type">*</span><span class="org-rainbow-delimiters-depth-2">(</span>s<span class="org-type">/</span>w0<span class="org-rainbow-delimiters-depth-2">)</span> <span class="org-type">+</span> <span class="org-highlight-numbers-number">1</span><span class="org-rainbow-delimiters-depth-1">)</span>; <span class="org-comment">% [V/(m/s)]</span>
</pre> </pre>
</div> </div>
@ -563,19 +607,83 @@ coh_hexa_z<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-
coh_hexa_z<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-type">:</span>, <span class="org-highlight-numbers-number">3</span><span class="org-rainbow-delimiters-depth-1">)</span> = coh6<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-type">:</span>, <span class="org-highlight-numbers-number">4</span><span class="org-rainbow-delimiters-depth-1">)</span>; <span class="org-comment">% hexa_z</span> coh_hexa_z<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-type">:</span>, <span class="org-highlight-numbers-number">3</span><span class="org-rainbow-delimiters-depth-1">)</span> = coh6<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-type">:</span>, <span class="org-highlight-numbers-number">4</span><span class="org-rainbow-delimiters-depth-1">)</span>; <span class="org-comment">% hexa_z</span>
</pre> </pre>
</div> </div>
</div>
</div>
<div id="outline-container-org528d8bd" class="outline-3">
<h3 id="org528d8bd"><span class="section-number-3">5.2</span> X-direction FRF</h3>
<div class="outline-text-3" id="text-5-2">
<div id="orgbe46711" class="figure">
<p><img src="figs/marble_x_frf.png" alt="marble_x_frf.png" />
</p>
<p><span class="figure-number">Figure 1: </span>Response to a force applied on the marble in the X direction</p>
</div>
<div id="org4005c39" class="figure">
<p><img src="figs/hexa_x_frf.png" alt="hexa_x_frf.png" />
</p>
<p><span class="figure-number">Figure 2: </span>Response to a force applied on the hexa in the X direction</p>
</div>
</div>
</div>
<div id="outline-container-orgb043f14" class="outline-3">
<h3 id="orgb043f14"><span class="section-number-3">5.3</span> Y-direction FRF</h3>
<div class="outline-text-3" id="text-5-3">
<div id="org959d073" class="figure">
<p><img src="figs/marble_y_frf.png" alt="marble_y_frf.png" />
</p>
<p><span class="figure-number">Figure 3: </span>Response to a force applied on the marble in the Y direction</p>
</div>
<div id="orge15a0ff" class="figure">
<p><img src="figs/hexa_y_frf.png" alt="hexa_y_frf.png" />
</p>
<p><span class="figure-number">Figure 4: </span>Response to a force applied on the hexa in the Y direction</p>
</div>
</div>
</div>
<div id="outline-container-org63f36f4" class="outline-3">
<h3 id="org63f36f4"><span class="section-number-3">5.4</span> Z-direction FRF</h3>
<div class="outline-text-3" id="text-5-4">
<div id="orgf2ca329" class="figure">
<p><img src="figs/marble_z_frf.png" alt="marble_z_frf.png" />
</p>
<p><span class="figure-number">Figure 5: </span>Response to a force applied on the marble in the Z direction</p>
</div>
<div id="orgbb33b62" class="figure">
<p><img src="figs/hexa_z_frf.png" alt="hexa_z_frf.png" />
</p>
<p><span class="figure-number">Figure 6: </span>Response to a force applied on the hexa in the Z direction</p>
</div>
</div>
</div>
<div id="outline-container-org9fd4cff" class="outline-3">
<h3 id="org9fd4cff"><span class="section-number-3">5.5</span> Save the processed data</h3>
<div class="outline-text-3" id="text-5-5">
<p> <p>
Finally, we save the processed data. Finally, we save the processed data.
</p> </p>
<div class="org-src-container"> <div class="org-src-container">
<pre class="src src-matlab">save<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/id31_microstation_2018_01_12_frf.mat'</span>, <span class="org-underline">...</span> <pre class="src src-matlab">save<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/id31_microstation_2018_01_12_frf.mat'</span>, <span class="org-underline">...</span>
<span class="org-string">'freq_frf'</span>, <span class="org-underline">...</span>
<span class="org-string">'frf_marble_x'</span>, <span class="org-underline">...</span> <span class="org-string">'frf_marble_x'</span>, <span class="org-underline">...</span>
<span class="org-string">'frf_marble_y'</span>, <span class="org-underline">...</span> <span class="org-string">'frf_marble_y'</span>, <span class="org-underline">...</span>
<span class="org-string">'frf_marble_z'</span>, <span class="org-underline">...</span> <span class="org-string">'frf_marble_z'</span>, <span class="org-underline">...</span>
<span class="org-string">'frf_hexa_x'</span>, <span class="org-underline">...</span> <span class="org-string">'frf_hexa_x'</span>, <span class="org-underline">...</span>
<span class="org-string">'frf_hexa_y'</span>, <span class="org-underline">...</span> <span class="org-string">'frf_hexa_y'</span>, <span class="org-underline">...</span>
<span class="org-string">'frf_hexa_z'</span><span class="org-rainbow-delimiters-depth-1">)</span>; <span class="org-string">'frf_hexa_z'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
save<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/id31_microstation_2018_01_12_frf.mat'</span>, <span class="org-underline">...</span> save<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/id31_microstation_2018_01_12_coh.mat'</span>, <span class="org-underline">...</span>
<span class="org-string">'freq_frf'</span>, <span class="org-underline">...</span>
<span class="org-string">'coh_marble_x'</span>, <span class="org-underline">...</span> <span class="org-string">'coh_marble_x'</span>, <span class="org-underline">...</span>
<span class="org-string">'coh_marble_y'</span>, <span class="org-underline">...</span> <span class="org-string">'coh_marble_y'</span>, <span class="org-underline">...</span>
<span class="org-string">'coh_marble_z'</span>, <span class="org-underline">...</span> <span class="org-string">'coh_marble_z'</span>, <span class="org-underline">...</span>
@ -586,69 +694,23 @@ save<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string
</div> </div>
</div> </div>
</div> </div>
<div id="outline-container-orgc8844c5" class="outline-3">
<h3 id="orgc8844c5"><span class="section-number-3">5.2</span> X-direction FRF</h3>
<div class="outline-text-3" id="text-5-2">
<div id="org46ec177" class="figure">
<p><img src="figs/marble_x_frf.png" alt="marble_x_frf.png" />
</p>
<p><span class="figure-number">Figure 1: </span>Response to a force applied on the marble in the X direction</p>
</div> </div>
<div id="outline-container-orge5ef1a0" class="outline-2">
<h2 id="orge5ef1a0"><span class="section-number-2">6</span> Results</h2>
<div class="outline-text-2" id="text-6">
<div class="important">
<ul class="org-ul">
<li>Resonances at 42Hz, 70Hz and 125Hz have been identified</li>
<li>The coherence is much better than when using accelerometers</li>
</ul>
<div id="org1e4d82b" class="figure">
<p><img src="figs/hexa_x_frf.png" alt="hexa_x_frf.png" />
</p>
<p><span class="figure-number">Figure 2: </span>Response to a force applied on the hexa in the X direction</p>
</div>
</div>
</div>
<div id="outline-container-orgcf9ba27" class="outline-3">
<h3 id="orgcf9ba27"><span class="section-number-3">5.3</span> Y-direction FRF</h3>
<div class="outline-text-3" id="text-5-3">
<div id="org259229b" class="figure">
<p><img src="figs/marble_y_frf.png" alt="marble_y_frf.png" />
</p>
<p><span class="figure-number">Figure 3: </span>Response to a force applied on the marble in the Y direction</p>
</div>
<div id="org24e7d47" class="figure">
<p><img src="figs/hexa_y_frf.png" alt="hexa_y_frf.png" />
</p>
<p><span class="figure-number">Figure 4: </span>Response to a force applied on the hexa in the Y direction</p>
</div>
</div>
</div>
<div id="outline-container-org482e0e7" class="outline-3">
<h3 id="org482e0e7"><span class="section-number-3">5.4</span> Z-direction FRF</h3>
<div class="outline-text-3" id="text-5-4">
<div id="orgd52f782" class="figure">
<p><img src="figs/marble_z_frf.png" alt="marble_z_frf.png" />
</p>
<p><span class="figure-number">Figure 5: </span>Response to a force applied on the marble in the Z direction</p>
</div>
<div id="org142632b" class="figure">
<p><img src="figs/hexa_z_frf.png" alt="hexa_z_frf.png" />
</p>
<p><span class="figure-number">Figure 6: </span>Response to a force applied on the hexa in the Z direction</p>
</div>
</div> </div>
</div> </div>
</div> </div>
</div> </div>
<div id="postamble" class="status"> <div id="postamble" class="status">
<p class="author">Author: Thomas Dehaeze</p> <p class="author">Author: Dehaeze Thomas</p>
<p class="date">Created: 2019-04-15 lun. 13:12</p> <p class="date">Created: 2019-05-14 mar. 23:06</p>
<p class="validation"><a href="http://validator.w3.org/check?uri=referer">Validate</a></p> <p class="validation"><a href="http://validator.w3.org/check?uri=referer">Validate</a></p>
</div> </div>
</body> </body>

15
2018-01-12 - Marc/index.org
View File

@ -30,10 +30,20 @@
:END: :END:
* Experimental conditions * Experimental conditions
| *Date* | 2018-01-12 |
| *Sensors* | Geophones |
| *Excitation* | Instrumented Hammer |
| *Location* | Laboratory |
| *Notes* | Unglued Granite |
- The granite is not glued to the floor - The granite is not glued to the floor
- FS = 512Hz - FS = 512Hz
- Made by Marc Lesourd on the 12 of January 2018 - Made by Marc Lesourd on the 12 of January 2018
*Goal*:
Obtain better coherence at low frequency.
* Measurements procedure * Measurements procedure
*Geophones* *Geophones*
L-28LB geophones (table [[tab:L-28LB]]) are placed on L-28LB geophones (table [[tab:L-28LB]]) are placed on
@ -348,3 +358,8 @@ Finally, we save the processed data.
'coh_hexa_y', ... 'coh_hexa_y', ...
'coh_hexa_z'); 'coh_hexa_z');
#+end_src #+end_src
* Results
#+begin_important
- Resonances at 42Hz, 70Hz and 125Hz have been identified
- The coherence is much better than when using accelerometers
#+end_important

162
2018-10-12 - Marc/index.html
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@ -3,12 +3,12 @@
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"> <html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head> <head>
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<title>Measurements</title> <title>Measurements</title>
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<h1 class="title">Measurements</h1> <h1 class="title">Measurements</h1>
<div id="table-of-contents"> <div id="table-of-contents">
<h2>Table of Contents</h2> <h2>Table of Contents</h2>
<div id="text-table-of-contents"> <div id="text-table-of-contents">
<ul> <ul>
<li><a href="#org767b001">1. Experimental conditions</a></li> <li><a href="#orga941937">1. Experimental conditions</a></li>
<li><a href="#org96ab348">2. Measurements procedure</a></li> <li><a href="#org0a36397">2. Measurements procedure</a></li>
<li><a href="#orgabd7c2d">3. Measurement Channels</a></li> <li><a href="#org9c8604e">3. Measurement Channels</a></li>
<li><a href="#org2674a8b">4. Experiments</a></li> <li><a href="#org3ee1fb7">4. Experiments</a></li>
<li><a href="#org35fdd83">5. Data Analysis</a> <li><a href="#orgaf6691c">5. Data Analysis</a>
<ul> <ul>
<li><a href="#org1a91184">5.1. Loading of the data</a></li> <li><a href="#orge954440">5.1. Loading of the data</a></li>
</ul> </ul>
</li> </li>
</ul> </ul>
</div> </div>
</div> </div>
<p> <div id="outline-container-orga941937" class="outline-2">
<a href="../index.html">Back to main page</a>. <h2 id="orga941937"><span class="section-number-2">1</span> Experimental conditions</h2>
</p>
<div id="outline-container-org767b001" class="outline-2">
<h2 id="org767b001"><span class="section-number-2">1</span> Experimental conditions</h2>
<div class="outline-text-2" id="text-1"> <div class="outline-text-2" id="text-1">
<ul class="org-ul"> <ul class="org-ul">
<li>Measurement made in the experiment hutch</li> <li>Measurement made in the experiment hutch</li>
<li>FS=256Hz</li> <li>FS=256Hz</li>
<li>Made by Marc Lesourd on the 12 of October 2018</li> <li>Made by Marc Lesourd on the 12 of October 2018</li>
</ul> </ul>
</div>
</div>
<div id="outline-container-org96ab348" class="outline-2"> <table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<h2 id="org96ab348"><span class="section-number-2">2</span> Measurements procedure</h2>
<div class="outline-text-2" id="text-2">
<colgroup>
<col class="org-left" />
<col class="org-left" />
</colgroup>
<tbody>
<tr>
<td class="org-left"><b>Date</b></td>
<td class="org-left">2018-10-12</td>
</tr>
<tr>
<td class="org-left"><b>Sensors</b></td>
<td class="org-left">Geophones</td>
</tr>
<tr>
<td class="org-left"><b>Excitation</b></td>
<td class="org-left">Instrumented Hammer</td>
</tr>
<tr>
<td class="org-left"><b>Location</b></td>
<td class="org-left">Experimental Hutch</td>
</tr>
</tbody>
</table>
<p> <p>
8 <b>Geophone</b> are used (see table <a href="#org17f9936">3</a>): <b>Goal</b>:
</p> </p>
<ul class="org-ul"> <ul class="org-ul">
<li>7 L-28LB geophones (table <a href="#orgad8b1e1">1</a>)</li> <li>The station is now installed on the experimental hutch with a glued granite (final location).</li>
<li>1 L-4C geophone (table <a href="#org02884d4">2</a>)</li> <li>The station is identified again.</li>
</ul>
</div>
</div>
<div id="outline-container-org0a36397" class="outline-2">
<h2 id="org0a36397"><span class="section-number-2">2</span> Measurements procedure</h2>
<div class="outline-text-2" id="text-2">
<p>
8 <b>Geophone</b> are used (see table <a href="#org84ab1ff">3</a>):
</p>
<ul class="org-ul">
<li>7 L-28LB geophones (table <a href="#org4eafe61">1</a>)</li>
<li>1 L-4C geophone (table <a href="#org1f04e75">2</a>)</li>
</ul> </ul>
<table id="orgad8b1e1" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides"> <table id="org4eafe61" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<caption class="t-above"><span class="table-number">Table 1:</span> L-28LB Geophone characteristics</caption> <caption class="t-above"><span class="table-number">Table 1:</span> L-28LB Geophone characteristics</caption>
<colgroup> <colgroup>
@ -318,7 +358,7 @@ for the JavaScript code in this tag.
</tbody> </tbody>
</table> </table>
<table id="org02884d4" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides"> <table id="org1f04e75" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<caption class="t-above"><span class="table-number">Table 2:</span> L-4C Geophone characteristics</caption> <caption class="t-above"><span class="table-number">Table 2:</span> L-4C Geophone characteristics</caption>
<colgroup> <colgroup>
@ -345,7 +385,7 @@ for the JavaScript code in this tag.
</table> </table>
<p> <p>
The structure is excited using an <b>instrumented hammer</b> with impacts on (see table <a href="#org6d4c491">4</a>): The structure is excited using an <b>instrumented hammer</b> with impacts on (see table <a href="#orgd034fab">4</a>):
</p> </p>
<ul class="org-ul"> <ul class="org-ul">
<li>Marble</li> <li>Marble</li>
@ -355,14 +395,14 @@ The structure is excited using an <b>instrumented hammer</b> with impacts on (se
</div> </div>
</div> </div>
<div id="outline-container-orgabd7c2d" class="outline-2"> <div id="outline-container-org9c8604e" class="outline-2">
<h2 id="orgabd7c2d"><span class="section-number-2">3</span> Measurement Channels</h2> <h2 id="org9c8604e"><span class="section-number-2">3</span> Measurement Channels</h2>
<div class="outline-text-2" id="text-3"> <div class="outline-text-2" id="text-3">
<p> <p>
Les fichiers xxx<sub>raw</sub> sont sans traitement dans le domaine temporel (environ 10 impacts par fichier) Les fichiers xxx<sub>raw</sub> sont sans traitement dans le domaine temporel (environ 10 impacts par fichier)
</p> </p>
<table id="org17f9936" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides"> <table id="org84ab1ff" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<caption class="t-above"><span class="table-number">Table 3:</span> Description of each measurement channel</caption> <caption class="t-above"><span class="table-number">Table 3:</span> Description of each measurement channel</caption>
<colgroup> <colgroup>
@ -451,10 +491,10 @@ Les fichiers xxx<sub>raw</sub> sont sans traitement dans le domaine temporel (en
</div> </div>
</div> </div>
<div id="outline-container-org2674a8b" class="outline-2"> <div id="outline-container-org3ee1fb7" class="outline-2">
<h2 id="org2674a8b"><span class="section-number-2">4</span> Experiments</h2> <h2 id="org3ee1fb7"><span class="section-number-2">4</span> Experiments</h2>
<div class="outline-text-2" id="text-4"> <div class="outline-text-2" id="text-4">
<table id="org6d4c491" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides"> <table id="orgd034fab" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<caption class="t-above"><span class="table-number">Table 4:</span> Description of the location of direction of the excitation for each measurement</caption> <caption class="t-above"><span class="table-number">Table 4:</span> Description of the location of direction of the excitation for each measurement</caption>
<colgroup> <colgroup>
@ -532,39 +572,39 @@ Les fichiers xxx<sub>raw</sub> sont sans traitement dans le domaine temporel (en
</div> </div>
</div> </div>
<div id="outline-container-org35fdd83" class="outline-2"> <div id="outline-container-orgaf6691c" class="outline-2">
<h2 id="org35fdd83"><span class="section-number-2">5</span> Data Analysis</h2> <h2 id="orgaf6691c"><span class="section-number-2">5</span> Data Analysis</h2>
<div class="outline-text-2" id="text-5"> <div class="outline-text-2" id="text-5">
</div> </div>
<div id="outline-container-org1a91184" class="outline-3"> <div id="outline-container-orge954440" class="outline-3">
<h3 id="org1a91184"><span class="section-number-3">5.1</span> Loading of the data</h3> <h3 id="orge954440"><span class="section-number-3">5.1</span> Loading of the data</h3>
<div class="outline-text-3" id="text-5-1"> <div class="outline-text-3" id="text-5-1">
<div class="org-src-container"> <div class="org-src-container">
<pre class="src src-matlab">load<span style="color: #DCDCCC;">(</span><span style="color: #CC9393;">'./data/freq_frf.mat'</span><span style="color: #DCDCCC;">)</span>; <pre class="src src-matlab">load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/freq_frf.mat'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
load<span style="color: #DCDCCC;">(</span><span style="color: #CC9393;">'./data/frf_hexa_x.mat'</span><span style="color: #DCDCCC;">)</span>; load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/frf_hexa_x.mat'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
load<span style="color: #DCDCCC;">(</span><span style="color: #CC9393;">'./data/frf_hexa_y.mat'</span><span style="color: #DCDCCC;">)</span>; load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/frf_hexa_y.mat'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
load<span style="color: #DCDCCC;">(</span><span style="color: #CC9393;">'./data/frf_hexa_z.mat'</span><span style="color: #DCDCCC;">)</span>; load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/frf_hexa_z.mat'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
load<span style="color: #DCDCCC;">(</span><span style="color: #CC9393;">'./data/frf_marble_x.mat'</span><span style="color: #DCDCCC;">)</span>; load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/frf_marble_x.mat'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
load<span style="color: #DCDCCC;">(</span><span style="color: #CC9393;">'./data/frf_marble_y.mat'</span><span style="color: #DCDCCC;">)</span>; load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/frf_marble_y.mat'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
load<span style="color: #DCDCCC;">(</span><span style="color: #CC9393;">'./data/frf_marble_z.mat'</span><span style="color: #DCDCCC;">)</span>; load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/frf_marble_z.mat'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
load<span style="color: #DCDCCC;">(</span><span style="color: #CC9393;">'./data/frf_ty_x.mat'</span><span style="color: #DCDCCC;">)</span>; load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/frf_ty_x.mat'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
load<span style="color: #DCDCCC;">(</span><span style="color: #CC9393;">'./data/frf_ty_y.mat'</span><span style="color: #DCDCCC;">)</span>; load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/frf_ty_y.mat'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
load<span style="color: #DCDCCC;">(</span><span style="color: #CC9393;">'./data/frf_ty_z.mat'</span><span style="color: #DCDCCC;">)</span>; load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/frf_ty_z.mat'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
load<span style="color: #DCDCCC;">(</span><span style="color: #CC9393;">'./data/phs_hexa_x.mat'</span><span style="color: #DCDCCC;">)</span>; load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/phs_hexa_x.mat'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
load<span style="color: #DCDCCC;">(</span><span style="color: #CC9393;">'./data/phs_hexa_y.mat'</span><span style="color: #DCDCCC;">)</span>; load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/phs_hexa_y.mat'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
load<span style="color: #DCDCCC;">(</span><span style="color: #CC9393;">'./data/phs_hexa_z.mat'</span><span style="color: #DCDCCC;">)</span>; load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/phs_hexa_z.mat'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
load<span style="color: #DCDCCC;">(</span><span style="color: #CC9393;">'./data/phs_marble_x.mat'</span><span style="color: #DCDCCC;">)</span>; load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/phs_marble_x.mat'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
load<span style="color: #DCDCCC;">(</span><span style="color: #CC9393;">'./data/phs_marble_y.mat'</span><span style="color: #DCDCCC;">)</span>; load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/phs_marble_y.mat'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
load<span style="color: #DCDCCC;">(</span><span style="color: #CC9393;">'./data/phs_marble_z.mat'</span><span style="color: #DCDCCC;">)</span>; load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/phs_marble_z.mat'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
load<span style="color: #DCDCCC;">(</span><span style="color: #CC9393;">'./data/phs_ty_x.mat'</span><span style="color: #DCDCCC;">)</span>; load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/phs_ty_x.mat'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
load<span style="color: #DCDCCC;">(</span><span style="color: #CC9393;">'./data/phs_ty_y.mat'</span><span style="color: #DCDCCC;">)</span>; load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/phs_ty_y.mat'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
load<span style="color: #DCDCCC;">(</span><span style="color: #CC9393;">'./data/phs_ty_z.mat'</span><span style="color: #DCDCCC;">)</span>; load<span class="org-rainbow-delimiters-depth-1">(</span><span class="org-string">'./data/phs_ty_z.mat'</span><span class="org-rainbow-delimiters-depth-1">)</span>;
</pre> </pre>
</div> </div>
</div> </div>
@ -572,8 +612,8 @@ load<span style="color: #DCDCCC;">(</span><span style="color: #CC9393;">'./data/
</div> </div>
</div> </div>
<div id="postamble" class="status"> <div id="postamble" class="status">
<p class="author">Author: Thomas Dehaeze</p> <p class="author">Author: Dehaeze Thomas</p>
<p class="date">Created: 2019-03-15 ven. 11:42</p> <p class="date">Created: 2019-05-14 mar. 23:06</p>
<p class="validation"><a href="http://validator.w3.org/check?uri=referer">Validate</a></p> <p class="validation"><a href="http://validator.w3.org/check?uri=referer">Validate</a></p>
</div> </div>
</body> </body>

9
2018-10-12 - Marc/index.org
View File

@ -34,6 +34,15 @@
- FS=256Hz - FS=256Hz
- Made by Marc Lesourd on the 12 of October 2018 - Made by Marc Lesourd on the 12 of October 2018
| *Date* | 2018-10-12 |
| *Sensors* | Geophones |
| *Excitation* | Instrumented Hammer |
| *Location* | Experimental Hutch |
*Goal*:
- The station is now installed on the experimental hutch with a glued granite (final location).
- The station is identified again.
* Measurements procedure * Measurements procedure
8 *Geophone* are used (see table [[tab:meas_channels]]): 8 *Geophone* are used (see table [[tab:meas_channels]]):
- 7 L-28LB geophones (table [[tab:L-28LB]]) - 7 L-28LB geophones (table [[tab:L-28LB]])

262
index.html
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@ -3,7 +3,7 @@
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"> <html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head> <head>
<!-- 2019-05-14 mar. 23:02 --> <!-- 2019-05-14 mar. 23:06 -->
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" /> <meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" /> <meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Measurement of the ID31 Micro-Station</title> <title>Measurement of the ID31 Micro-Station</title>
@ -254,33 +254,9 @@ for the JavaScript code in this tag.
<h2>Table of Contents</h2> <h2>Table of Contents</h2>
<div id="text-table-of-contents"> <div id="text-table-of-contents">
<ul> <ul>
<li><a href="#org3dd37ca">1. Measurements of the dynamics of the station</a> <li><a href="#orgee0a061">1. Measurements of the dynamics of the station</a></li>
<ul> <li><a href="#org439949d">2. Measurements of perturbations</a></li>
<li><a href="#orgc6a04a7">1.1. Measurement 1</a> <li><a href="#org77887a7">3. Other</a></li>
<ul>
<li><a href="#org3d7d31e">1.1.1. Notes</a></li>
<li><a href="#org6f222a5">1.1.2. Goal</a></li>
<li><a href="#org66caa3c">1.1.3. Results</a></li>
</ul>
</li>
<li><a href="#orga240707">1.2. Measurement 2</a>
<ul>
<li><a href="#org6750c68">1.2.1. Notes</a></li>
<li><a href="#org514680e">1.2.2. Goal</a></li>
<li><a href="#orga1029fa">1.2.3. Results</a></li>
</ul>
</li>
<li><a href="#org0266a1b">1.3. <span class="todo TODO">TODO</span> Measurement 3</a>
<ul>
<li><a href="#org3a059d2">1.3.1. Notes</a></li>
<li><a href="#org8fec9e8">1.3.2. Goal</a></li>
<li><a href="#org638b982">1.3.3. Results</a></li>
</ul>
</li>
</ul>
</li>
<li><a href="#orge16cbdc">2. Measurements of perturbations</a></li>
<li><a href="#org7e1127d">3. Other</a></li>
</ul> </ul>
</div> </div>
</div> </div>
@ -289,233 +265,25 @@ for the JavaScript code in this tag.
This web-page gathers all the measurements done on the ID31 Micro Station. This web-page gathers all the measurements done on the ID31 Micro Station.
</p> </p>
<div id="outline-container-org3dd37ca" class="outline-2"> <div id="outline-container-orgee0a061" class="outline-2">
<h2 id="org3dd37ca"><span class="section-number-2">1</span> Measurements of the dynamics of the station</h2> <h2 id="orgee0a061"><span class="section-number-2">1</span> Measurements of the dynamics of the station</h2>
<div class="outline-text-2" id="text-1"> <div class="outline-text-2" id="text-1">
<ul class="org-ul"> <ul class="org-ul">
<li><a href="dynamical-meas-granite/index.html">Dynamics from floor motion to marble motion</a></li> <li><a href="dynamical-meas-granite/index.html">Dynamics from floor motion to marble motion</a></li>
</ul> <li><a href="2017-11-17 - Marc/index.html">Measurement of the dynamics of the station using intrumented hammer and accelerometers</a></li>
</div> <li><a href="2018-01-12 - Marc/index.html">Measurement of the dynamics of the station using intrumented hammer and geophones</a></li>
<li><a href="2018-10-12 - Marc/index.html">Measurement of the dyanamics - Micro station glued on ID31</a></li>
<div id="outline-container-orgc6a04a7" class="outline-3">
<h3 id="orgc6a04a7"><span class="section-number-3">1.1</span> Measurement 1</h3>
<div class="outline-text-3" id="text-1-1">
<p>
<a href="2017-11-17 - Marc/index.html">Link to the analysis</a>
</p>
</div>
<div id="outline-container-org3d7d31e" class="outline-4">
<h4 id="org3d7d31e"><span class="section-number-4">1.1.1</span> Notes</h4>
<div class="outline-text-4" id="text-1-1-1">
<table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<colgroup>
<col class="org-left" />
<col class="org-left" />
</colgroup>
<tbody>
<tr>
<td class="org-left"><b>Date</b></td>
<td class="org-left">2017-11-17</td>
</tr>
<tr>
<td class="org-left"><b>Sensors</b></td>
<td class="org-left">Accelerometers</td>
</tr>
<tr>
<td class="org-left"><b>Excitation</b></td>
<td class="org-left">Instrumented Hammer</td>
</tr>
<tr>
<td class="org-left"><b>Location</b></td>
<td class="org-left">Laboratory</td>
</tr>
</tbody>
</table>
<p>
Dynamics of the station is evaluated using instrumented hammer and accelerometers fixed on each stage.
</p>
</div>
</div>
<div id="outline-container-org6f222a5" class="outline-4">
<h4 id="org6f222a5"><span class="section-number-4">1.1.2</span> Goal</h4>
<div class="outline-text-4" id="text-1-1-2">
<ul class="org-ul">
<li>Obtain a first estimation of resonance frequencies</li>
</ul> </ul>
</div> </div>
</div> </div>
<div id="outline-container-org66caa3c" class="outline-4"> <div id="outline-container-org439949d" class="outline-2">
<h4 id="org66caa3c"><span class="section-number-4">1.1.3</span> Results</h4> <h2 id="org439949d"><span class="section-number-2">2</span> Measurements of perturbations</h2>
<div class="outline-text-4" id="text-1-1-3">
<div class="important">
<ul class="org-ul">
<li>Resonances have been identified at 45Hz and 75Hz</li>
<li>However, the quality of the measurements are bad at low frequency</li>
<li>New measurements should be done with Geophones</li>
</ul>
</div>
</div>
</div>
</div>
<div id="outline-container-orga240707" class="outline-3">
<h3 id="orga240707"><span class="section-number-3">1.2</span> Measurement 2</h3>
<div class="outline-text-3" id="text-1-2">
<p>
<a href="2018-01-12 - Marc/index.html">Link to the analysis</a>
</p>
</div>
<div id="outline-container-org6750c68" class="outline-4">
<h4 id="org6750c68"><span class="section-number-4">1.2.1</span> Notes</h4>
<div class="outline-text-4" id="text-1-2-1">
<table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<colgroup>
<col class="org-left" />
<col class="org-left" />
</colgroup>
<tbody>
<tr>
<td class="org-left"><b>Date</b></td>
<td class="org-left">2018-01-12</td>
</tr>
<tr>
<td class="org-left"><b>Sensors</b></td>
<td class="org-left">Geophones</td>
</tr>
<tr>
<td class="org-left"><b>Excitation</b></td>
<td class="org-left">Instrumented Hammer</td>
</tr>
<tr>
<td class="org-left"><b>Location</b></td>
<td class="org-left">Laboratory</td>
</tr>
<tr>
<td class="org-left"><b>Notes</b></td>
<td class="org-left">Unglued Granite</td>
</tr>
</tbody>
</table>
</div>
</div>
<div id="outline-container-org514680e" class="outline-4">
<h4 id="org514680e"><span class="section-number-4">1.2.2</span> Goal</h4>
<div class="outline-text-4" id="text-1-2-2">
<p>
Obtain better coherence at low frequency.
</p>
</div>
</div>
<div id="outline-container-orga1029fa" class="outline-4">
<h4 id="orga1029fa"><span class="section-number-4">1.2.3</span> Results</h4>
<div class="outline-text-4" id="text-1-2-3">
<div class="important">
<ul class="org-ul">
<li>Resonances at 42Hz, 70Hz and 125Hz have been identified</li>
<li>The coherence is much better than when using accelerometers</li>
</ul>
</div>
</div>
</div>
</div>
<div id="outline-container-org0266a1b" class="outline-3">
<h3 id="org0266a1b"><span class="section-number-3">1.3</span> <span class="todo TODO">TODO</span> Measurement 3</h3>
<div class="outline-text-3" id="text-1-3">
<p>
<a href="2018-10-12 - Marc/index.html">Link to the analysis</a>
</p>
</div>
<div id="outline-container-org3a059d2" class="outline-4">
<h4 id="org3a059d2"><span class="section-number-4">1.3.1</span> Notes</h4>
<div class="outline-text-4" id="text-1-3-1">
<table border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<colgroup>
<col class="org-left" />
<col class="org-left" />
</colgroup>
<tbody>
<tr>
<td class="org-left"><b>Date</b></td>
<td class="org-left">2018-10-12</td>
</tr>
<tr>
<td class="org-left"><b>Sensors</b></td>
<td class="org-left">Geophones</td>
</tr>
<tr>
<td class="org-left"><b>Excitation</b></td>
<td class="org-left">Instrumented Hammer</td>
</tr>
<tr>
<td class="org-left"><b>Location</b></td>
<td class="org-left">Experimental Hutch</td>
</tr>
</tbody>
</table>
</div>
</div>
<div id="outline-container-org8fec9e8" class="outline-4">
<h4 id="org8fec9e8"><span class="section-number-4">1.3.2</span> Goal</h4>
<div class="outline-text-4" id="text-1-3-2">
<p>
The station is now installed on the experimental hutch with a glued granite (final location).
The station is identified again.
</p>
</div>
</div>
<div id="outline-container-org638b982" class="outline-4">
<h4 id="org638b982"><span class="section-number-4">1.3.3</span> Results</h4>
<div class="outline-text-4" id="text-1-3-3">
<div class="important">
<p>
</p>
</div>
</div>
</div>
</div>
</div>
<div id="outline-container-orge16cbdc" class="outline-2">
<h2 id="orge16cbdc"><span class="section-number-2">2</span> Measurements of perturbations</h2>
<div class="outline-text-2" id="text-2"> <div class="outline-text-2" id="text-2">
<ul class="org-ul"> <ul class="org-ul">
<li><a href="disturbance-sr-rz/index.html">Measurement of the vibrations induced by the rotation of the slip-ring and spindle</a></li> <li><a href="disturbance-sr-rz/index.html">Measurement of the vibrations induced by the rotation of the slip-ring and spindle</a></li>
<li><a href="disturbance-ty-sr/index.html">Measurement of the vibrations induced by the simultaneous rotation of the slip-ring and scan of the translation stage</a></li> <li><a href="disturbance-ty-sr/index.html">Measurement of the vibrations induced by the simultaneous rotation of the slip-ring and scan of the translation stage</a></li>
<li><a href="disturbance-measurement/index.html">Disturbance Measurement - Spindle</a> TODO</li> <li><a href="disturbance-measurement/index.html">Disturbance Measurement - Spindle</a></li>
<li><a href="slip-ring-electrical-noise/index.html">Measurement of the electrical noise induced by the slip-ring</a></li> <li><a href="slip-ring-electrical-noise/index.html">Measurement of the electrical noise induced by the slip-ring</a></li>
<li><a href="ground-motion/index.html">Ground motion measurements</a></li> <li><a href="ground-motion/index.html">Ground motion measurements</a></li>
<li><a href="static-to-dynamic/index.html">Static guiding errors - Ty</a></li> <li><a href="static-to-dynamic/index.html">Static guiding errors - Ty</a></li>
@ -527,8 +295,8 @@ The station is identified again.
</div> </div>
</div> </div>
<div id="outline-container-org7e1127d" class="outline-2"> <div id="outline-container-org77887a7" class="outline-2">
<h2 id="org7e1127d"><span class="section-number-2">3</span> Other</h2> <h2 id="org77887a7"><span class="section-number-2">3</span> Other</h2>
<div class="outline-text-2" id="text-3"> <div class="outline-text-2" id="text-3">
<ul class="org-ul"> <ul class="org-ul">
<li><a href="huddle-test-geophones/index.html">Huddle Test - Geophones</a></li> <li><a href="huddle-test-geophones/index.html">Huddle Test - Geophones</a></li>
@ -544,7 +312,7 @@ The station is identified again.
</div> </div>
<div id="postamble" class="status"> <div id="postamble" class="status">
<p class="author">Author: Thomas Dehaeze</p> <p class="author">Author: Thomas Dehaeze</p>
<p class="date">Created: 2019-05-14 mar. 23:02</p> <p class="date">Created: 2019-05-14 mar. 23:06</p>
<p class="validation"><a href="http://validator.w3.org/check?uri=referer">Validate</a></p> <p class="validation"><a href="http://validator.w3.org/check?uri=referer">Validate</a></p>
</div> </div>
</body> </body>

63
index.org
View File

@ -15,69 +15,14 @@ This web-page gathers all the measurements done on the ID31 Micro Station.
* Measurements of the dynamics of the station * Measurements of the dynamics of the station
- [[file:dynamical-meas-granite/index.org][Dynamics from floor motion to marble motion]] - [[file:dynamical-meas-granite/index.org][Dynamics from floor motion to marble motion]]
- [[file:2017-11-17%20-%20Marc/index.org][Measurement of the dynamics of the station using intrumented hammer and accelerometers]]
** Measurement 1 - [[file:2018-01-12%20-%20Marc/index.org][Measurement of the dynamics of the station using intrumented hammer and geophones]]
[[file:2017-11-17%20-%20Marc/index.org][Link to the analysis]] - [[file:2018-10-12%20-%20Marc/index.org][Measurement of the dyanamics - Micro station glued on ID31]]
*** Notes
| *Date* | 2017-11-17 |
| *Sensors* | Accelerometers |
| *Excitation* | Instrumented Hammer |
| *Location* | Laboratory |
Dynamics of the station is evaluated using instrumented hammer and accelerometers fixed on each stage.
*** Goal
- Obtain a first estimation of resonance frequencies
*** Results
#+begin_important
- Resonances have been identified at 45Hz and 75Hz
- However, the quality of the measurements are bad at low frequency
- New measurements should be done with Geophones
#+end_important
** Measurement 2
[[file:2018-01-12%20-%20Marc/index.org][Link to the analysis]]
*** Notes
| *Date* | 2018-01-12 |
| *Sensors* | Geophones |
| *Excitation* | Instrumented Hammer |
| *Location* | Laboratory |
| *Notes* | Unglued Granite |
*** Goal
Obtain better coherence at low frequency.
*** Results
#+begin_important
- Resonances at 42Hz, 70Hz and 125Hz have been identified
- The coherence is much better than when using accelerometers
#+end_important
** TODO Measurement 3
[[file:2018-10-12%20-%20Marc/index.org][Link to the analysis]]
*** Notes
| *Date* | 2018-10-12 |
| *Sensors* | Geophones |
| *Excitation* | Instrumented Hammer |
| *Location* | Experimental Hutch |
*** Goal
The station is now installed on the experimental hutch with a glued granite (final location).
The station is identified again.
*** Results
#+begin_important
#+end_important
* Measurements of perturbations * Measurements of perturbations
- [[file:disturbance-sr-rz/index.org][Measurement of the vibrations induced by the rotation of the slip-ring and spindle]] - [[file:disturbance-sr-rz/index.org][Measurement of the vibrations induced by the rotation of the slip-ring and spindle]]
- [[file:disturbance-ty-sr/index.org][Measurement of the vibrations induced by the simultaneous rotation of the slip-ring and scan of the translation stage]] - [[file:disturbance-ty-sr/index.org][Measurement of the vibrations induced by the simultaneous rotation of the slip-ring and scan of the translation stage]]
- [[file:disturbance-measurement/index.org][Disturbance Measurement - Spindle]] TODO - [[file:disturbance-measurement/index.org][Disturbance Measurement - Spindle]]
- [[file:slip-ring-electrical-noise/index.org][Measurement of the electrical noise induced by the slip-ring]] - [[file:slip-ring-electrical-noise/index.org][Measurement of the electrical noise induced by the slip-ring]]
- [[file:ground-motion/index.org][Ground motion measurements]] - [[file:ground-motion/index.org][Ground motion measurements]]
- [[file:static-to-dynamic/index.org][Static guiding errors - Ty]] - [[file:static-to-dynamic/index.org][Static guiding errors - Ty]]