diff --git a/2017-11-17 - Marc/index.html b/2017-11-17 - Marc/index.html index d654bd0..82f367d 100644 Binary files a/2017-11-17 - Marc/index.html and b/2017-11-17 - Marc/index.html differ diff --git a/2017-11-17 - Marc/index.org b/2017-11-17 - Marc/index.org index 786133e..eb77b82 100644 --- a/2017-11-17 - Marc/index.org +++ b/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 diff --git a/2018-01-12 - Marc/index.html b/2018-01-12 - Marc/index.html index 88167fd..3a5be3e 100644 Binary files a/2018-01-12 - Marc/index.html and b/2018-01-12 - Marc/index.html differ diff --git a/2018-01-12 - Marc/index.org b/2018-01-12 - Marc/index.org index c29019f..8d70171 100644 --- a/2018-01-12 - Marc/index.org +++ b/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 diff --git a/2018-10-12 - Marc/index.html b/2018-10-12 - Marc/index.html index 2bbc04d..a4b645c 100644 Binary files a/2018-10-12 - Marc/index.html and b/2018-10-12 - Marc/index.html differ diff --git a/2018-10-12 - Marc/index.org b/2018-10-12 - Marc/index.org index 9c4f772..fc5ee00 100644 --- a/2018-10-12 - Marc/index.org +++ b/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]]) diff --git a/index.html b/index.html index fc6b86e..ce7edc7 100644 Binary files a/index.html and b/index.html differ diff --git a/index.org b/index.org index bafeb86..a83f132 100644 --- a/index.org +++ b/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]] - -** Measurement 1 -[[file:2017-11-17%20-%20Marc/index.org][Link to the analysis]] - -*** 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 +- [[file:2017-11-17%20-%20Marc/index.org][Measurement of the dynamics of the station using intrumented hammer and accelerometers]] +- [[file:2018-01-12%20-%20Marc/index.org][Measurement of the dynamics of the station using intrumented hammer and geophones]] +- [[file:2018-10-12%20-%20Marc/index.org][Measurement of the dyanamics - Micro station glued on ID31]] * 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]]