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| * general * performance test of the inertial damping was done with ETMX and ITMX. * This will be summarized by Lucia. * The simulation model for type-A suspension is now being modified from https://granite.phys.s.u-tokyo.ac.jp/svn/LCGT/trunk/VIS/SuspensionControlModel/script/TypeA/typeA_siso180517.m * Originally for my own use though. * Some channels and sensor correction paths are added. * Some of the filter name was corrected. * The updated one is in my local , is to be uploaded to SVN after renaming, adding some paths, if necessary: * /kagra/Dropbox/Personal/Fujii/TypeA/simulation/ * At ETMX * trying to tune the sensor-correction gain. Still Ongoing.[[https://www.evernote.com/l/AoMAm3SGwEZL-50TGuVxRQnXBYgpEDzOGw4/ |local note]] * At ITMY * A work introducing payload damping filters is started, this work is mainly taken care by Yamada-kun. * ITMX * Attempts of WFS control demonstration with TM OpLev is ongoing. * Beside that, some missing damping filters were implemented as needed. * 46.6 Hz peak investigation * Promising mode: a higher-order mode of TM chain in pitch [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=10204|klog#10204]] * On the way of damping with a band-pass comb filter * Updated the list of the modification parts in the 3D CAD model. |
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| * Join to the test of WFS. | |
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| === OMMT & OSTM === | === OMMT & OSTM (Takahashi) === |
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| * Dummy mirror was delivered. * Ordered the spacer plate and the connector plate. |
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| * VIS repair/upgrade work between O3 and O4 | === VIS repair/upgrade work between O3 and O4 === * The list is required by the SEO. They need it for scheduling and arrangement of the site works between O3 and O4 considering the task of all subsystem. * One more week was added to the period for EYV work. * Recovering of the FRs includes the adjustment of ballast masses. Though needed period depends on the situation, two more weeks were added for each SR3/BS work. * Installation of the yaw FR for BS includes the replacement of bearing. * The re-gluing of the IM/TM magnets was omitted. * Replacement of the ferromagnetic parts on SF in BS/SR3 was added. * Expenses will be covered by the 2019FY budget. Spare connectors are included in the budget. * Optional * Improvement of the FRs with limiter switch. * Improvement of the ACCs. * Connector supports for the assembled in-vac cables. * Replacement of the LVDT cards. * Replacement of the LVDT-actuator units in BS. * Small items * Tuning of BS IP by small ballast. * Flip connections in BS IP H2 coil actuator. * Replacement of the chipped magnets (12x12x12 mm) for IP in SR3 * Moving of the electronics to small rack in SR3. * [[ https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=10674|List for SEO]] |
Agenda/Minutes of the VIS Meeting on 2019/8/30
2019/8/30 14:00 -
Participants:
Progress report
Type-A
Past week report
- general
- performance test of the inertial damping was done with ETMX and ITMX.
- This will be summarized by Lucia.
The simulation model for type-A suspension is now being modified from https://granite.phys.s.u-tokyo.ac.jp/svn/LCGT/trunk/VIS/SuspensionControlModel/script/TypeA/typeA_siso180517.m
- Originally for my own use though.
- Some channels and sensor correction paths are added.
- Some of the filter name was corrected.
- The updated one is in my local , is to be uploaded to SVN after renaming, adding some paths, if necessary:
- /kagra/Dropbox/Personal/Fujii/TypeA/simulation/
- performance test of the inertial damping was done with ETMX and ITMX.
- At ETMX
trying to tune the sensor-correction gain. Still Ongoing.local note
- At ITMY
- A work introducing payload damping filters is started, this work is mainly taken care by Yamada-kun.
- ITMX
Attempts of WFS control demonstration with TM OpLev is ongoing.
- Beside that, some missing damping filters were implemented as needed.
- 46.6 Hz peak investigation
Promising mode: a higher-order mode of TM chain in pitch klog#10204
- On the way of damping with a band-pass comb filter
- Updated the list of the modification parts in the 3D CAD model.
Plan for coming weeks
- Join to the test of WFS.
Type B
Past week report
Plan for coming weeks
Type-Bp
Past week report
Plan for coming weeks
OMMT & OSTM (Takahashi)
Past week report
- Dummy mirror was delivered.
- Ordered the spacer plate and the connector plate.
Plan for coming weeks
VIS electronics
Past week report
Plan for coming weeks
Other site works
Safety
- Incidents:
Discussion
VIS repair/upgrade work between O3 and O4
- The list is required by the SEO. They need it for scheduling and arrangement of the site works between O3 and O4 considering the task of all subsystem.
- One more week was added to the period for EYV work.
- Recovering of the FRs includes the adjustment of ballast masses. Though needed period depends on the situation, two more weeks were added for each SR3/BS work.
- Installation of the yaw FR for BS includes the replacement of bearing.
- The re-gluing of the IM/TM magnets was omitted.
- Replacement of the ferromagnetic parts on SF in BS/SR3 was added.
- Expenses will be covered by the 2019FY budget. Spare connectors are included in the budget.
- Optional
- Improvement of the FRs with limiter switch.
- Improvement of the ACCs.
- Connector supports for the assembled in-vac cables.
- Replacement of the LVDT cards.
- Replacement of the LVDT-actuator units in BS.
- Small items
- Tuning of BS IP by small ballast.
- Flip connections in BS IP H2 coil actuator.
- Replacement of the chipped magnets (12x12x12 mm) for IP in SR3
- Moving of the electronics to small rack in SR3.
Travel Plans
- Travel (Week of 9/2):
- Takahashi:
- Sato:
- Hirata:
- Shoda:
- Fujii:
- Tanaka:
- Travel (Week of 9/9):
- Takahashi:
- Sato:
- Hirata:
- Shoda:
- Fujii:
- Tanaka:
Next meeting
On 2019/9/6(Fri)