Differences between revisions 170 and 171
Revision 170 as of 2017-10-30 10:08:22
Size: 3460
Editor: MarkBarton
Revision 171 as of 2017-10-30 10:14:07
Size: 2595
Editor: MarkBarton
Deletions are marked like this. Additions are marked like this.
Line 22: Line 22:
== 2017-10-16 == == 2017-10-30 ==
Line 25: Line 25:
 * --(Borrow portable hard drive.)--
 * --(Remove sticker residue and permanent marker writing on PI.)--
 * --(Fix broken and unreliable connections on IP LVDTs.)--
 * --(Reconfigure the stepper motor cables for Miyo-kun.)--
 * Wipe any rust from around IP LVDTs.
 * --(Add IP LVDT gains and offsets to IP_LVDTINF filter blocks.)--
 * Realign OL.
 * Design, install angular lock servo using OL.
Line 32: Line 28:
 * --(Install damping filters for IP LVDTs.)--
Line 35: Line 30:
 * --(Install and debug IP LVDT and geophone diagonalization matrices.)--
 * --(Work with alignment team.)--
 * --(Work with Mirapro on SR LBB and tank installation (Hirata-san, from Wed))--
 * --(Work with Miyo-kun to get user interface for stepper motors.)--
 * --(Calibrate IP FR actuation against IP LVDT sensing.)--
 * SR procurement.
 * --(Lower LBB by 17.5 mm; suspend and rebalance after removing table KOACH filters.)--
 * --(Reroute cable to eliminate need for fifth feedthrough.)--
Line 52: Line 39:
 * (Put up safety bars in SR3 area.)  * Put up safety bars in SR3 area.
Line 56: Line 43:
 * --(Enter new IP matrices and do safe.snap.)--
 * --(Send stepper driver info to Miyo-kun)--.
Line 62: Line 47:
 * --(Add support for comments to SUMCON.)--  * Add support for comments to SUMCON.
Line 64: Line 49:
 * --(Derive matrices for IP FRs.)--  * Publish matrices for IP FRs.
Line 73: Line 58:
 * Wipe any rust from around IP LVDTs.
 * Update circuit diagram.

VIS Type B BS Near Term To-Do List

Archived BS To-Do Items

SR To-Do Items

Every Week

Coming Weeks

Every Week


  • Vacuum and roll floor.
  • Wipe ladders.
  • Tidy tools, parts.
  • Get stuff from ../WishList


Main Assembly Sequence

  • Realign OL.
  • Design, install angular lock servo using OL.
  • Calibrate IP LVDT actuation against IP LVDT sensing.
  • Adjust gains and debug damping for IM OSEMs and GAS LVDTs.
  • Modify IP LVDT damping filters to include set point.
  • Set all EQ stops to TBD clearance.
  • Measure IP period; adjust ballast mass.
  • Calibrate IP LVDT sensing against IP LVDT actuation, IP FRs.
  • TFs.


  • Move stuff out of PR2 area.
  • Tidy/label parts.
  • Move safety bars from BS AF area to SR2 area.
  • Put up safety bars in SR3 area.
  • Close hole in floor above BS AF area.


  • Update real-time model to number channels from #0.
  • Remove old OL stuff; add link to new OL stuff.
  • Remove unused screens.
  • Sort out SVN.
  • Add support for comments to SUMCON.
  • Create SUMCON model with values commented.
  • Publish matrices for IP FRs.


  • Finalize redesign of IP yaw adjuster.
  • Design better F0 FR adjuster.

Tasks Not To Forget

Major Tasks

  • Wipe any rust from around IP LVDTs.
  • Update circuit diagram.
  • (Time permitting) Try adding mass to IP.
  • Update BS Install Procedure with screenshots from new on-assembly-frame 3D CAD.
  • Finish assembly drawing for LBB and LBB damper ring and post on JGWDoc (Hirata-san).
  • Figure out how to make PI yaw adjustment reliable.

Minor Tasks


  • Put pointy-tipped screw in RM trolley for BS
  • Return/replace borrowed parts:
    • Temporary ballast mass (dog clamps) in BF.


Real-time and SUMCON models

  • Create SUMCON models for full BS and major installation milestones.
  • Create controls design description (cf LIGO-T1100378).

  • Make table of ADC/DAC assignments and check for consistency with D1503600 and k1visbs (Enzo, Mark)
  • Understand/document/debug Kokeyama-san's DIO stuff.
  • Measure LPCD and HPCD output filter response.
  • Design and install software compensation filters for LPCD and HPCD output filters.
  • Design and install GAS drift compensation filters.

KAGRA/Subgroups/VIS/TypeB/ToDoBS (last edited 2019-01-04 15:21:23 by MarkBarton)