|
Size: 2920
Comment:
|
Size: 2896
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 13: | Line 13: |
| ==== Report for the week 7/29 (Written by Fabian) ==== | ==== Report for the week 7/29 ==== |
| Line 32: | Line 32: |
Agenda/Minutes of the VIS Meeting on 2019/8/2
2019/8/2 14:00 -
Participants:
Progress report
Type-A
Past week report
Plan for coming weeks
Type B
Report for the week 7/29
- I offloaded fishing rods in GAS filters and IPs in BS and SRM.
- I implemented scripts for the automatic measurement of amplitude spectral densities (ASDs) of suspension sensors (usually used for residual motion estimation).
Highlights of recent ASD measurements can be found in entry 9726. The residual motion was measured in ALIGNED and FLOAT states.
- In SRM and SR3 the motion in ALINED state was smaller than in FLOAT state, which is expected. See entries and respectively .
In SR2, the motion in pitch and yaw displacement is larger in ALIGNED state, and the longitudinal velocity is the same in both states.
In BS, the longitudinal displacement is the same in both states.
- Some features of the measured ASDs are the following:
In SRM, SR3 and SR2 in pitch there is either a large bump (SRM and SR3) or excitation (SR2) between 0.3 Hz and 1 Hz. 9756.
In SRM pitch the control system seems to be introducing noise in two frequency bands, before and after the bump. See 9756.
In SR3 pitch the control loops seems to be introducing noise between 1 Hz and 2 Hz. See 9755.
In SR2 pitch the control loops seems to be introducing noise between 0.380 Hz and 2 Hz. See 9752.
In SR2 yaw the control loops seems to be introducing noise between 0.045 Hz and 0.230 Hz. See 9752.
In SR2 longitudinal speed the control system seems to excite a large peak at 0.705 Hz. See 9752.
Plan for the week 8/5
- Check the BS amplitude spectral densities.
- Check the longitudinal degree of freedom in SRs.
- Aim to identify noise sources.
Type-Bp
Past week report
Plan for coming weeks
OMMT & OSTM
Past week report
Plan for coming weeks
VIS electronics
Past week report
Plan for coming weeks
Other site works
Safety
- Incidents:
Discussion
Travel Plans
- Travel (Week of 8/5):
- Takahashi:
- Sato:
- Hirata:
- Shoda:
- Fujii:
- Tanaka:
- Travel (Week of 8/12):
- Takahashi:
- Sato:
- Hirata:
- Shoda:
- Fujii:
- Tanaka:
Next meeting
On 2019/8/9(Fri)