ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
16007
|
Thu Apr 8 17:04:43 2021 |
Anchal, Paco | Update | SUS | First Successful Coil Balancing | Today, we finally crossed the last hurdle
and got a successful converging coil balancing
run. |
  |
16009
|
Fri Apr 9 13:13:00 2021 |
Anchal, Paco | Update | SUS | Faster coil balancing | We ran again this method but with the 'b'
parameter as a matrix instead. This provides
more gain on some off-diagonal terms than |
 |
16010
|
Fri Apr 9 17:41:12 2021 |
rana | Update | SUS | Faster coil balancing | convergence 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 |
rana | Update | SUS | Faster coil balancing | I 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 |
Anchal | Update | SUS | What'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 |
rana | Update | SUS | What'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 |
Anchal | Update | SUS | Plan for calculating filter banks for output matrix aka F2A aka F2P | Plan of action
Get
the transfer functions of the suspension
plant from actuated DOF to sensed DOF. We'll |
|
16035
|
Thu Apr 15 11:41:43 2021 |
Anchal | Update | SUS | Proposed filters for output matrix aka F2A aka F2P | Here' s aquick update before we leave
for lunch. We have managed to calculate some
filter that would go on the POS column in |
|
16042
|
Fri Apr 16 11:36:36 2021 |
Anchal, Paco | Update | SUS | Tested proposed filters for POS colum in MC2 output matrix | We tried two sets of filters on the output
matrix POS column in MC2. Both versions failed.
Following are some details. |
    |
16043
|
Fri Apr 16 15:47:58 2021 |
rana | Update | SUS | Tested proposed filters for POS colum in MC2 output matrix | Looks mostly right, but you
used the OSEM sensors as readbacks. |
|
16049
|
Mon Apr 19 12:18:19 2021 |
Anchal, Paco | Update | SUS | Tested proposed filters for POS colum in MC2 output matrix | The filters were somewhat successful, how
much we can see in attachment 1. The tip
about difference between eigenmode basis |
  |
16054
|
Tue Apr 20 10:52:49 2021 |
Anchal, Paco | Update | SUS | AC gain coil output balancing for IMC | [Paco, Anchal]
We adopted the following
procedure to balance the coil output gains |
   |
16055
|
Tue Apr 20 18:19:30 2021 |
Anchal | Update | SUS | MC2 coil balanced at DC | Following up from morning's work, I
balanced the coils at DC as well. Attachment
1 is screenshot of striptool in which blue |
  |
16063
|
Wed Apr 21 11:38:27 2021 |
Anchal, Paco | Update | SUS | MC2 Damping Gains Optimized | We did a step response test with MC2 Suspensoin
Damping Gains and optimized them to get <5
oscillations in ringdown. |
 |
16066
|
Wed Apr 21 15:50:01 2021 |
Anchal, Paco | Update | SUS | MC2 Suspension Optimization summary |
MC2
Coil Balancing DC and AC Gains
|
|
16067
|
Wed Apr 21 18:49:29 2021 |
rana | Update | SUS | MC2 Suspension Optimization summary | the
POS column should be all 1 for the AC balancing. |
|
16071
|
Thu Apr 22 08:50:21 2021 |
Anchal | Update | SUS | MC2 Suspension Optimization summary | Yes, 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, Paco | Update | SUS | MC1 and MC3 Suspension Optimization Summary | |
|
16073
|
Thu Apr 22 14:22:39 2021 |
gautam | Update | SUS | Settings restored | The MC / WFS stability seemed off to me.
Trending some channels at random, I saw that
the MC3 PIT/YAW gains were restored mixed |
|
16078
|
Thu Apr 22 15:36:54 2021 |
Anchal | Update | SUS | Settings restored | The mix up was my fault I think. I restored
the channels manually instead of using burt
restore. Your message suggests that we can |
|
16079
|
Thu Apr 22 17:04:17 2021 |
gautam | Update | SUS | Settings restored | Indeed, you can make your own snapshot
by specifying the channels to snap in a .req
file. But what I meant was, we should confirm |
|
16086
|
Mon Apr 26 18:55:39 2021 |
Anchal, Paco | Update | SUS | MC2 F2A Filters Tested | Today we tested the F2A filters created
from the DC gain values listed in 16066.
Filters:
For |
  |
16087
|
Tue Apr 27 10:05:28 2021 |
Anchal, Paco | Update | SUS | MC1 and MC3 F2A Filters Tested | We extended the f2a filter implementation
and diagnostics as summarized in 16086
to MC1 and MC3. |
   |
16089
|
Wed Apr 28 10:56:10 2021 |
Anchal, Paco | Update | SUS | IMC Filters diagnosed | Good
morning! |
7x |
16091
|
Wed Apr 28 17:09:11 2021 |
Anchal | Update | SUS | Tuned Suspension Parameters uploaded for long term behavior monitoring | I have uploaded all the new settings mentioned
in 16066
and 16072. |
|
16094
|
Thu Apr 29 10:52:56 2021 |
Anchal | Update | SUS | IMC Trans QPD and WFS loops step response test | In 16087
we mentioned that we were unable to do a
step response test for WFS loop to get an |
 |
16102
|
Thu Apr 29 18:53:33 2021 |
Anchal | Update | SUS | IMC Suspension Damping Gains Test | With the input matrix, coil ouput gains
and F2A filters loaded as in 16091,
I tested the suspension loops' step response |
  |
16110
|
Mon May 3 16:24:14 2021 |
Anchal | Update | SUS | IMC Suspension Damping Gains Test Repeated with IMC unlocked | We repeated the same test with IMC unlocked.
We had found these gains when IMC was unlocked
and their characterization needs to be done |
  |
16120
|
Wed May 5 09:04:47 2021 |
Anchal | Update | SUS | New IMC Suspension Damping Gains uploaded for long term testing | We have uploaded the new damping gains
on all the suspensions of IMC. This completes
changing all the configuration to as mentioned |
|
16133
|
Wed May 12 11:45:13 2021 |
Anchal, Paco | Summary | SUS | New IMC Settings are miserable | We picked a few parameters from 40m summary
page and plotted them to see the effect of
new settings. On April 4th, old settings |
  |
16135
|
Wed May 12 14:23:20 2021 |
Jordan | Update | SUS | Mass Properties of SOS Assembly with 3"->2" Optic sleeve, in SI units | |
|
16136
|
Wed May 12 16:53:59 2021 |
Koji | Update | SUS | Mass Properties of SOS Assembly with 3"->2" Optic sleeve, in SI units | No, this is the property of the suspension
assembly. The mass says 10kg
Could you do the same for the testmass |
|
16137
|
Wed May 12 17:06:52 2021 |
Jordan | Update | SUS | Mass Properties of SOS Assembly with 3"->2" Optic sleeve, in SI units | Here are the mass properties for the only
the test mass assembly (optic, 3" ring,
and wire block). (Updated with g*mm^2) |
|
16138
|
Thu May 13 11:55:04 2021 |
Anchal, Paco | Update | SUS | MC1 suspension misbehaving | We came in the morning with the following
scene on the zita monitor:
|
 |
16139
|
Thu May 13 19:38:54 2021 |
Anchal | Update | SUS | MC1 Satellite Amplifier Debugged | [Anchal Koji]
Koji and I did a few tests with
an OSEM emulator on the satellite amplifier |
|
16143
|
Sat May 15 14:54:24 2021 |
gautam | Update | SUS | IMC settings reverted | I want to work on the IFO this weekend,
so I reverted the IMC suspension settings
just now to what I know work (until the new |
|
16146
|
Wed May 19 18:29:41 2021 |
Koji | Update | SUS | Mass Properties of SOS Assembly with 3"->2" Optic sleeve, in SI units | Calculation for the SOS POS/PIT/YAW resonant
frequencies
- Nominal height gap between the |
 |
16147
|
Thu May 20 10:35:57 2021 |
Anchal | Update | SUS | IMC settings reverted | For future reference, the new settings
can be upoaded from a script in the same
directory. Run python /users/anchal/20210505_IMC_Tuned_SUS_with_Gains/uploadNewConfigIMC.py |
|
16149
|
Fri May 21 00:05:45 2021 |
Koji | Update | SUS | New electronics: Sat Amp / Coil Drivers | 11 new Satellite Amps were picked up from
Downs. 7 more are coming from there. I have
one spare unit I made. 1 sat amp has already |
|
16157
|
Mon May 24 19:14:15 2021 |
Anchal, Paco | Summary | SUS | MC1 Free Swing Test set to trigger | We've set a free swing test to trigger
at 3:30 am tomorrow for MC1. The script for
tests is running on tmux session named 'freeSwingMC1' |
|
16159
|
Tue May 25 10:22:16 2021 |
Anchal, Paco | Summary | SUS | MC1 new input matrix calculated and uploaded | The test was succesful and brought back
the IMC to lock point at the end.
We calculated new input matrix |
|
16165
|
Thu May 27 14:11:15 2021 |
Jordan | Update | SUS | CoM to Clamping Point Measurement for 3" Adapter Ring | The current vertical distance between the
CoM and the wire clamping point on the 3"
Ring assembly is 0.33mm. That is the CoM |
 |
16169
|
Tue Jun 1 14:26:23 2021 |
Jordan | Update | SUS | CoM to Clamping Point Measurement for 3" Adapter Ring | After changing the material of the Balance
Mass from 6061 Al to 304 Steel, and changing
the thickness to 0.21" from 0.25". |
|
16173
|
Wed Jun 2 01:08:57 2021 |
Koji | Update | SUS | CoM to Clamping Point Measurement for 3" Adapter Ring | How about to use the non-Ag coated threaded
shaft + the end SS masses with helicoils
inserted? Does this save the masses to get |
|
16174
|
Wed Jun 2 09:43:30 2021 |
Anchal, Paco | Summary | SUS | IMC Settings characterization | Plot description:
We
picked up three 10 min times belonging to
the three different configurations:
'Old |
   |
16175
|
Wed Jun 2 16:20:59 2021 |
Anchal, Paco | Summary | SUS | IMC Suspension gains reverted to old values | Following the conclusion, we are reverting
the suspension gains to old values, i.e.
|
|
16209
|
Thu Jun 17 11:45:42 2021 |
Anchal, Paco | Update | SUS | MC1 Gave trouble again | TL;DR
MC1 LL Sensor showed signs of fluctuating
large offsets. We tried to find the issue |
 |
16210
|
Thu Jun 17 16:37:23 2021 |
Anchal, Paco | Update | SUS | c1susaux computer rebooted | Jon suggested to reboot the acromag chassis,
then the computer, and we did this without
success. Then, Koji suggested we try running |
|
16212
|
Thu Jun 17 22:25:38 2021 |
Koji | Update | SUS | New electronics: Sat Amp / Coil Drivers | It is a belated report: We received 5 more
sat amps on June 4th. (I said 7 more but
it was 6 more) So we still have one more |
|
16218
|
Tue Jun 22 11:56:16 2021 |
Anchal, Paco | Update | SUS | ADC/Slow channels issues | We checked back in time to see how the
BS and PRM OSEM slow channels are zero. It
was clear that they became zero when we worked |
|