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ID Date Author Type Categorydown Subject Text Attachments
  15926   Tue Mar 16 19:13:09 2021 Paco, AnchalUpdateSUSFirst success in Input Matric DiagonalizationAfter jumping through few hoops, we have
one successful result in diagonalizing the
input matrix for MC1, MC2 and MC3.
 IMC_InputMatrixDiagonalization.pdfInMatCalcScripts.zip 
  15929   Wed Mar 17 10:52:48 2021 JordanUpdateSUS3" Ring Adpater for SOS I have added a .1", 45deg chamfer
to the bottom of the adapter ring. This was
added for a new placement of the eq stops,
 Side_View.pngFront_View.pngRing_with_Modifed_Bracket.pngBack_of_ring.pngFront_of_Ring.png 
  15930   Wed Mar 17 11:57:54 2021 Paco, AnchalUpdateSUSTested New Input Matrix for MC1[Paco, Anchal]

Paco accidentally clicked on C1:SUS-MC1_UL_TO_COIL_SW_1_1
(MC1 POS to UL Coil Switch) and clicked it
 20210317_MC1_InMATtest.pdfMC1_Input_Matrix_Test.tar.gz 
  15934   Wed Mar 17 16:30:46 2021 AnchalUpdateSUSNormalized Input Matrices plotted better than SURF studentsHere, I present the same input matrices
now normalized row by row to have same norm
as current matrices rows. These now I plotted
 IMC_InputMatrixDiagonalization.pdfNewAndOldMatrices.zip 
  15937   Thu Mar 18 09:18:49 2021 Paco, AnchalUpdateSUSTesting of new input matrices with new data[Paco, Anchal]

Since the new generated matrices
were created for the measurement made last
 MC_Optics_Kicked_Time_Series_1.pdfTEST_Input_Matrix_Diagonalization.pdf 
  15939   Thu Mar 18 12:46:53 2021 ranaUpdateSUSTesting of new input matrices with new dataGood Enough! Let's move on with output
matrix tuning. I will talk to you guys about
it privately so that the whole doesn't
  
  15943   Fri Mar 19 10:49:44 2021 Paco, AnchalUpdateSUSTrying coil actuation balance[Paco, Anchal]


We decided to try out the
coil actuation balancing after seeing some
  
  15951   Mon Mar 22 11:57:21 2021 Paco, AnchalUpdateSUSTrying coil actuation balance[Paco, Anchal]


For MC coil balancing we
will use the ASC (i.e. WFS) error signals
 210322_MC1_ASCY.pdfNewandOldMatrices.tar.gz 
  15952   Mon Mar 22 15:10:00 2021 ranaUpdateSUSTrying coil actuation balanceThere's an integrator in the MC WFS
servos, so you should never be disabling
the ASC inputs in the suspensions. Disabling
  
  15954   Mon Mar 22 19:07:50 2021 Paco, AnchalUpdateSUSTrying coil actuation balanceWe found that following protocol works
for changing the input matrices to new matrices:


Shut the PSL shutter C1:PSL-PSL_ShutterRqst.
 8x 
  15957   Wed Mar 24 09:23:49 2021 PacoUpdateSUSMC3 new Input Matrix[Paco]


Found IMC locked upon arrival
Loaded
newest MC3 Input Matrix coefficients using
  
  15961   Thu Mar 25 11:46:31 2021 Paco, AnchalUpdateSUSMC2 Coil Balancing updatesProof-of-principle


We
excited PIT and YAW dofs using LOCKIN1 in
MC2 on Monday.
We
 CoilActuationBalancing.ipynb.tar.gzMC2_CoilBalancePITnorm_excSamePIT.pdfMC2_CoilBalanceYAWnorm_excSameYAW.pdf20210325_IMC_CoilBalance.tar.gz 
  15966   Thu Mar 25 16:02:15 2021 gautamSummarySUSRepeated measurement of coil Rs & Ls for PRM/BSMethod

Since I am mainly concerned with
the actuator part of the OSEM, I chose to
  
  15970   Fri Mar 26 11:54:37 2021 Paco, AnchalUpdateSUSMC2 Coil Balancing updates[Paco, Anchal]


Today
we spent the morning testing the scripts
  
  15971   Sun Mar 28 14:16:25 2021 AnchalSummarySUSMC3 new Input Matrix not providing stable loopRana asked us to write out here the new
MC3 input matrix we have calculated along
with the old one. The new matrix is not working
 MC3_Input_Matrix_Diagonalization.pdf 
  15972   Mon Mar 29 10:44:51 2021 Paco, AnchalUpdateSUSMC2 Coil Balancing updatesWe ran the coil balancing procedure 4 times
while iterating through the output matrix
optimization.
 MC2OutMatCrossCouple_Old-to-It3.pdf20210329_MC2_CrossCoupleTest.tar.gz 
  15973   Mon Mar 29 17:07:17 2021 gautamSummarySUSMC3 new Input Matrix not providing stable loopI suppose you've tried doing the submatrix
approach, where SIDE is excluded for the
face DoFs? Does that give a better matrix?
  
  15974   Mon Mar 29 17:11:54 2021 gautamUpdateSUSMC2 Coil Balancing updatesFor this technique to work, (i) the WFS
loops must be well tuned and (ii) the beam
must be well centered on MC2. I am reasonably
  
  15975   Mon Mar 29 17:34:52 2021 ranaUpdateSUSMC2 Coil Balancing updatesI think there's been some mis-communication.
There's no updated Hang procedure, but
there is the one that Anchal, Paco and I
  
  15982   Wed Mar 31 22:58:32 2021 Anchal, PacoUpdateSUSMC2 Coil Balancing TestA cross-coupling test has been set to trigger
at 05:00 am on April 1st, 2021. The script
is waiting on tmux session 'cB' on
  
  15983   Thu Apr 1 00:50:06 2021 gautamUpdateSUSPRMdiagI spent some time investigating the PRM
this evening, trying out some of the stuff
we discussed in the meeting.
  
  15984   Thu Apr 1 13:56:49 2021 Anchal, PacoUpdateSUSMC2 Coil Balancing Test ResultsThe coil balancing attempt failed. The
off-diagonal values in the measured sensing
matrices either remained the same or increased.
 SDistanceFromIdentity.pdfSmatIterations.pdfTestingExcitationAlongYAW.pdf 
  15985   Thu Apr 1 18:01:06 2021 Anchal, PacoUpdateSUSMC2 Coil Balancing Test Results Success??After fixing a few things we felt were
wrong in our implementation of the algorithm,
we ran the coil balancing for 12 iterations
 SDistanceFromIdentity.pdfSmatIterations.pdfMC2CoilCrossCoupling_opt.png 
  15987   Thu Apr 1 18:48:45 2021 gautamUpdateSUSMC2 Coil Balancing Test Results Success??In these results, can you also include
the new matrix and what the relative imbalances
were?
  
  15988   Thu Apr 1 21:13:54 2021 AnchalUpdateSUSMatrix results, new measurement set to trigger
New
Input matrix used for MC2 (C1:SUS-MC2_INMATRIX_ii_jj


  
  15991   Fri Apr 2 14:51:20 2021 AnchalUpdateSUSBug found, need to redo the balancingLast run gave similar results as the quick
run we did earlier. The code has been unable
to strike out couplings with POS. We found
  
  15993   Fri Apr 2 15:22:54 2021 gautamUpdateSUSMatrix results, new measurement set to triggerHow should I try to understand why PIT
and YAW are so different? 

  
  16001   Tue Apr 6 18:46:36 2021 Anchal, PacoUpdateSUSUpdates on recent effortsAs mentioned in last post, we earlier made
an error in making sure that all time series
arrays go in with same sampling rate in CSD
 FirstMeasurementPlots.pdf 
  16003   Wed Apr 7 02:50:49 2021 KojiUpdateSUSFlange InspectionsBasically I went around all the chambers
and all the DB25 flanges to check the invac
cable configurations. Also took more time
  
  16004   Wed Apr 7 13:07:03 2021 JordanUpdateSUSCoM on 3"->2" Adapter Ring for SOSAdding the chamfer around the edge of the
optic ring did not change the center of mass
relative to the plane from the suspension
 CoM_with_Chamfer.pngMoments_of_Inertia.PNG 
  16005   Wed Apr 7 17:38:51 2021 AnchalUpdateSUSTrying to uncouple only PIT and YAW firstTo test if our method is working at all,
we went for the simpler case of just uncoupling
PIT and YAW. This is also because the sensor
 SDistanceFromIdentity.pdfSmatIterations.pdfTimeSeriesPlots.pdfCSDPlots.pdfSmatrixPlots.pdf 
  16007   Thu Apr 8 17:04:43 2021 Anchal, PacoUpdateSUSFirst Successful Coil BalancingToday, we finally crossed the last hurdle
and got a successful converging coil balancing
run. 
 SDistanceFromIdentity.pdfSmatIterations.pdfSmatrixPlots.pdf 
  16009   Fri Apr 9 13:13:00 2021 Anchal, PacoUpdateSUSFaster coil balancingWe ran again this method but with the 'b'
parameter as a matrix instead. This provides
more gain on some off-diagonal terms than
 SmatIterations.pdfMC2AllOutmat.txt 
  16010   Fri Apr 9 17:41:12 2021 ranaUpdateSUSFaster coil balancingconvergence is great.

Next we wanna get the F2A filters
made since most of the IMC control happens
  
  16014   Sat Apr 10 10:07:47 2021 ranaUpdateSUSFaster coil balancingI think I mis-spoke about the balancing
channels before. The ~20 Hz balancing
could go into either the COIL banks or the
  
  16017   Mon Apr 12 10:07:35 2021 AnchalUpdateSUSWhat's F2A??I'm not sure I understand what F2A
is? I couldn't find a description of
this filter anywhere and don't remember
  
  16020   Tue Apr 13 09:51:22 2021 ranaUpdateSUSWhat's F2A??Force to Angle. It just means the filters
that are in the POS OUTPUT matrix. I think
in the past sometimes they are called F2P
  
  16031   Wed Apr 14 17:53:38 2021 AnchalUpdateSUSPlan for calculating filter banks for output matrix aka F2A aka F2PPlan of action


Get
the transfer functions of the suspension
plant from actuated DOF to sensed DOF. We'll
 MC2propF2A_UL.pdf 
  16035   Thu Apr 15 11:41:43 2021 AnchalUpdateSUSProposed filters for output matrix aka F2A aka F2PHere' s aquick update before we leave
for lunch. We have managed to calculate some
filter that would go on the POS column in
 MC2propPOSfb.pdf 
  16042   Fri Apr 16 11:36:36 2021 Anchal, PacoUpdateSUSTested proposed filters for POS colum in MC2 output matrixWe tried two sets of filters on the output
matrix POS column in MC2. Both versions failed.
Following are some details.
 20210416_MC2DCcoilBalancingNoFilters.pdfuncFilters.pdf20210416_MC2DCcoilBalancingWithFilters.pdfuncFilters_v2.pdf20210416_MC2DCcoilBalancingWithFilters_v2.pdf 
  16043   Fri Apr 16 15:47:58 2021 ranaUpdateSUSTested proposed filters for POS colum in MC2 output matrixLooks mostly right, but you
used the OSEM sensors as readbacks.
  
  16049   Mon Apr 19 12:18:19 2021 Anchal, PacoUpdateSUSTested proposed filters for POS colum in MC2 output matrixThe filters were somewhat successful, how
much we can see in attachment 1. The tip
about difference between eigenmode basis
 CrossCoupleTestForEgToCtFilters.pdfuncFilters.pdfuncFilters_v2.pdf 
  16054   Tue Apr 20 10:52:49 2021 Anchal, PacoUpdateSUSAC gain coil output balancing for IMC[Paco, Anchal]


We adopted the following
procedure to balance the coil output gains
 POS2PYuncoupled.pdfPIT2PYuncoupled.pdfMC1YAWexc.pdfMC1PITexc.pdf 
  16055   Tue Apr 20 18:19:30 2021 AnchalUpdateSUSMC2 coil balanced at DCFollowing up from morning's work, I
balanced the coils at DC as well. Attachment
1 is screenshot of striptool in which blue
 MC2_DC_Coil_Balanced_St.pngIMC_F2A_Params_MC2.pdfUploadedPOS_F2A_Filters.pdf 
  16063   Wed Apr 21 11:38:27 2021 Anchal, PacoUpdateSUSMC2 Damping Gains OptimizedWe did a step response test with MC2 Suspensoin
Damping Gains and optimized them to get <5
oscillations in ringdown.
 MC2_DampGainStepTestWithNewGains.pngMC2_DampGainStepTestWithOldGains.png 
  16066   Wed Apr 21 15:50:01 2021 Anchal, PacoUpdateSUSMC2 Suspension Optimization summary
MC2
Coil Balancing DC and AC Gains


  
  16067   Wed Apr 21 18:49:29 2021 ranaUpdateSUSMC2 Suspension Optimization summarythe
POS column should be all 1 for the AC balancing.
  
  16071   Thu Apr 22 08:50:21 2021 AnchalUpdateSUSMC2 Suspension Optimization summaryYes, during the AC balancing, POS column
was set to all 1. This table shows the final
values after all the steps. The first 3 columns
  
  16072   Thu Apr 22 12:17:23 2021 Anchal, PacoUpdateSUSMC1 and MC3 Suspension Optimization Summary    
  16073   Thu Apr 22 14:22:39 2021 gautamUpdateSUSSettings restoredThe MC / WFS stability seemed off to me.
Trending some channels at random, I saw that
the MC3 PIT/YAW gains were restored mixed
 MCdamping.png 
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