Update main page

2017-11-17 - Marc/index.org

@@ -30,6 +30,18 @@
 :END:
 
 * 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
 - The granite is not glued to the floor
 - 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
 #+RESULTS: fig:hexa_z_frf
 [[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

2018-01-12 - Marc/index.org

@@ -30,10 +30,20 @@
 :END:
 
 * Experimental conditions
+
+| *Date*       | 2018-01-12          |
+| *Sensors*    | Geophones           |
+| *Excitation* | Instrumented Hammer |
+| *Location*   | Laboratory          |
+| *Notes*      | Unglued Granite     |
+
 - The granite is not glued to the floor
 - FS = 512Hz
 - Made by Marc Lesourd on the 12 of January 2018
 
+*Goal*:
+Obtain better coherence at low frequency.
+
 * Measurements procedure
 *Geophones*
 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_z');
 #+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

2018-10-12 - Marc/index.org

@@ -34,6 +34,15 @@
 - FS=256Hz
 - 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
 8 *Geophone* are used (see table [[tab:meas_channels]]):
 - 7 L-28LB geophones (table [[tab:L-28LB]])

index.org

@@ -15,69 +15,14 @@ This web-page gathers all the measurements done on the ID31 Micro Station.
 
 * Measurements of the dynamics of the station
 - [[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
 - [[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-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:ground-motion/index.org][Ground motion measurements]]
 - [[file:static-to-dynamic/index.org][Static guiding errors - Ty]]