123 lines
3.9 KiB
Org Mode
123 lines
3.9 KiB
Org Mode
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#+TITLE: Measurements
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:drawer:
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#+STARTUP: overview
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#+HTML_HEAD: <link rel="stylesheet" type="text/css" href="../css/htmlize.css"/>
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#+HTML_HEAD: <link rel="stylesheet" type="text/css" href="../css/readtheorg.css"/>
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#+HTML_HEAD: <script src="../js/jquery.min.js"></script>
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#+HTML_HEAD: <script src="../js/bootstrap.min.js"></script>
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#+HTML_HEAD: <script src="../js/jquery.stickytableheaders.min.js"></script>
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#+HTML_HEAD: <script src="../js/readtheorg.js"></script>
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#+LATEX_CLASS: cleanreport
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#+LaTeX_CLASS_OPTIONS: [tocnp, secbreak, minted]
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#+PROPERTY: header-args:matlab :session *MATLAB*
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#+PROPERTY: header-args:matlab+ :comments org
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#+PROPERTY: header-args:matlab+ :exports both
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#+PROPERTY: header-args:matlab+ :eval no-export
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#+PROPERTY: header-args:matlab+ :noweb yes
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#+PROPERTY: header-args:matlab+ :mkdirp yes
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#+PROPERTY: header-args:matlab+ :output-dir figs
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:end:
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* Experimental conditions
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- Measurement made in the experiment hutch
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- FS=256Hz
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- Made by Marc Lesourd on the 12 of October 2018
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* Measurements procedure
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8 *Geophone* are used (see table [[tab:meas_channels]]):
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- 7 L-28LB geophones (table [[tab:L-28LB]])
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- 1 L-4C geophone (table [[tab:L-4C]])
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#+NAME: tab:L-28LB
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#+CAPTION: L-28LB Geophone characteristics
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| Natural Frequency [Hz] | 4.5 |
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| Weight [g] | 140 |
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| Sensitivity [V/(m/s)] | 31.3 |
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#+NAME: tab:L-4C
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#+CAPTION: L-4C Geophone characteristics
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| Natural Frequency [Hz] | 1 |
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| Weight [g] | 2150 |
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| Sensitivity [V/(m/s)] | 276.8 |
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The structure is excited using an *instrumented hammer* with impacts on (see table [[tab:measurements]]):
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- Marble
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- Ty
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- Hexapod
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* Measurement Channels
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Les fichiers xxx_raw sont sans traitement dans le domaine temporel (environ 10 impacts par fichier)
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#+NAME: tab:meas_channels
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#+CAPTION: Description of each measurement channel
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| Ch. nb | Element | Location | Direction |
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|--------+-----------------+----------+-----------|
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| 1 | Geophone L-4C | Marble | Z |
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| 2 | Geophone L-28LB | Ty | Z |
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| 3 | Geophone L-28LB | Tilt | Z |
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| 4 | Geophone L-28LB | Hexa | Z |
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| 5 | Geophone L-28LB | Marble | H |
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| 6 | Geophone L-28LB | TY | H |
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| 7 | Geophone L-28LB | Tilt | H |
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| 8 | Geophone L-28LB | Hexa | H |
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|--------+-----------------+----------+-----------|
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| 9 | Hammer | Variable | Variable |
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* Experiments
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#+NAME: tab:measurements
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#+CAPTION: Description of the location of direction of the excitation for each measurement
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| Meas. nb | Location | Direction |
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|----------+----------+-----------|
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| 1 | Marble | Y |
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| 2 | Ty | Y |
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| 3 | Hexa | Y |
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|----------+----------+-----------|
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| 4 | Marble | Z |
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| 5 | Ty | Z |
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| 6 | Hexa | Z |
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|----------+----------+-----------|
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| 7 | Marble | X |
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| 8 | Ty | X |
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| 9 | Hexa | X |
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* Data Analysis
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** Loading of the data
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#+begin_src matlab :exports none :results silent
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<<matlab-init>>
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#+end_src
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#+BEGIN_SRC matlab :results none :exports none :var currentdir=(file-name-directory buffer-file-name)
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cd(currentdir);
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#+END_SRC
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#+begin_src matlab :exports code :results none
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load('./data/freq_frf.mat');
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load('./data/frf_hexa_x.mat');
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load('./data/frf_hexa_y.mat');
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load('./data/frf_hexa_z.mat');
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load('./data/frf_marble_x.mat');
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load('./data/frf_marble_y.mat');
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load('./data/frf_marble_z.mat');
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load('./data/frf_ty_x.mat');
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load('./data/frf_ty_y.mat');
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load('./data/frf_ty_z.mat');
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load('./data/phs_hexa_x.mat');
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load('./data/phs_hexa_y.mat');
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load('./data/phs_hexa_z.mat');
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load('./data/phs_marble_x.mat');
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load('./data/phs_marble_y.mat');
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load('./data/phs_marble_z.mat');
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load('./data/phs_ty_x.mat');
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load('./data/phs_ty_y.mat');
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load('./data/phs_ty_z.mat');
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#+end_src
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