3.8 KiB
3.8 KiB
#+TITLE:Measurement of the ID31 Micro-Station
This web-page gathers all the measurements done on the ID31 Micro Station.
Measurements of the dynamics of the station
Measurement 1
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
- 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
Measurement 2
Notes
| Date | 2018-01-12 |
| Sensors | Geophones |
| Excitation | Instrumented Hammer |
| Location | Laboratory |
| Notes | Unglued Granite |
Goal
Obtain better coherence at low frequency.
Results
- Resonances at 42Hz, 70Hz and 125Hz have been identified
- The coherence is much better than when using accelerometers
TODO Measurement 3
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
Measurements of perturbations
- Measurement of the vibrations induced by the rotation of the slip-ring and spindle
- Measurement of the vibrations induced by the simultaneous rotation of the slip-ring and scan of the translation stage
- Disturbance Measurement - Spindle TODO
- Measurement of the electrical noise induced by the slip-ring
- Ground motion measurements
- Static guiding errors - Ty
- Static guiding errors - Spindle
- Disturbance induced by the control system of each stage
- Vibrations due to Ty scans
- Perturbation due to the control loop of each stage