Agenda/Minutes of the VIS Meeting on 2019/5/31
2019/5/31 13:30 - 14:30
Participants: Takahashi, Shoda, Hirata, Aso, Tanaka, Ishizaki, Sato, Fujii, Terrence
Progress report
Schedule
Site work schedule: [[|XLSX]]
Type-A (Takahashi)
Past week report
[Okutomi, Fujii, Yamada]
- Measured the transfer functions of payloads by the oplevs.
- Implemented the oplev servo block to the payload models.
- Updated all the real-time models. (The moderate WD system is implemented.)
Plan for coming weeks
- Preparation for the ER on 8th.
Type B (Mark)
Report for the week 5/27 (written by Fabian)
Shoda-san implemented the moderate watchdog: when tripping the amount of actuation will ramp down to zero smoothly. Klog entry 9009.
- Terrence updated the BS guardian.
- Terrence designed a VIS status monitor. The font might be too small for some people.
- Terrence worked on SRM inertial damping.
- There is coherence between the geophones and LVDTs at 0.1 Hz.
- He designed a filter with a blending frequency of 0.110 Hz.
- The system seems stable.
For SR2 Fabian calculated the sensor noise fed back into the system by the control loop: entry 8979.
- The GAS filters' contrbution is too high.
- I asked Enzo and he didn't rolled off the filters at higher frequecies.
- Filter modification was assigned to Fabian.
Fabian and Yokozawa-san measured the settings of the SR3 LVDT driver. Klog entry 9025.
Plan for coming weeks
- Terrence will work in the inertial damping.
- In the weekly comissioning meeting Fabian made the commitment of writing a list of the measurements we want to do with the DRMI for Type B characterization.I will write it by next week and send it around for comnents.
Type-Bp (Shoda)
Past week report
Plan for coming weeks
OMMT & OSTM (Takahashi)
Past week report
[Sato]
- Started the design of OSTM suspension.
Plan for coming weeks
- Taking out the MC-suspension from TAMA.
VIS electronics (Tanaka)
Past week report
Plan for coming weeks
Other site works
Safety
- Incidents: no incident
- Foreseen risks
- Type-A: no
- Type-B: no
Discussion
- Mechanical repair necessary after O3
- Do we need to repair the ETMX F2 ?
- We will not attempt to repair this before O4
- Can we repair the ITMY BF Yaw pico ?
- We will inspect the BF pico first.
- Depending on the cause of the trouble, we try to fix it.
- Type-Bp magnet polarization problems (PRM IM and PR2 TM)
- Estimate magnetic noise coupling first.
- If the estimated noise is too large, we will attempt to fix the problem.
- How to fix the Type-B FR problems ?
- Can we fix the problem by re-adjusting the ballast masses ?
- Check the details of the problem with Mark and Fabian.
- Do we need to repair the ETMX F2 ?
Travel Plans
- Travel (Week of 6/3):
- Takahashi:
- Sato:
- Mark:
- Hirata:
- Shoda:
- Fujii: 3-7
- Tanioka:
- Tanaka:
- Terrence:
- Travel (Week of 6/10):
- Takahashi:
- Sato:
- Mark:
- Hirata:
- Shoda:
- Fujii: 10-14
- Tanioka:
- Tanaka:
- Terrence:
Next meeting
On 2019/6/7(Fri)