ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
7031
|
Wed Jul 25 16:55:01 2012 |
Den | Update | digital noise | notch, lowpass filters | Direct Form 2 is noisy in the first
test. This is the one similar to Matt's in
his presentation. Input signal was a sine |
6x |
7036
|
Thu Jul 26 10:22:03 2012 |
Den | Update | digital noise | notch, lowpass filters |
|
   |
7037
|
Thu Jul 26 12:10:28 2012 |
Den | Update | CDS | new c1tst model for testing RCG code |
|
|
7041
|
Thu Jul 26 17:39:49 2012 |
Den | Update | digital noise | biquad key is working | I've filtered a 1 Hz sin wave excitation
with a notch filter inside c1sus and c1rfm
models. The biquad key is switched on in |
   |
7042
|
Thu Jul 26 21:31:44 2012 |
Den | Update | digital noise | online biquad works |
|
 |
7050
|
Mon Jul 30 14:24:25 2012 |
Den | Update | digital noise | biquad key is working |
|
|
7052
|
Mon Jul 30 16:05:36 2012 |
Den | Update | digital noise | filter checker | We decided to write a script that
will check online filters for digital noise.
One method can be implemented using the following |
  |
7055
|
Tue Jul 31 00:27:52 2012 |
Den | Update | PEM | trillium | We have a Trillium for several days from
Vladimir. I've put seismometer inside the
foam box on linolium. I was not able to level |
|
7083
|
Fri Aug 3 13:05:28 2012 |
Den | Update | PEM | shims | As we do not have legs for Trillium, I
was advised to use shims to adjust the levels.
However, they produce extra resonance at |
|
7085
|
Sat Aug 4 17:32:31 2012 |
Den | Update | digital noise | filter checker | The script estimates digital noise produces
by online filters. First version of Matlab
files and complied c files are in scripts/digital_noise |
 |
7086
|
Sun Aug 5 13:48:40 2012 |
Den | Update | CDS | Move to RCG 2.5 tag release |
|
  |
7111
|
Tue Aug 7 23:33:34 2012 |
Den | Update | Environment | Nearby EQ |
|
  |
7147
|
Fri Aug 10 17:38:29 2012 |
Den | Update | PEM | classify seismic c code |
|
|
7150
|
Fri Aug 10 21:37:15 2012 |
Den | Update | PEM | gur, sts noise | Using Guralp, STS-2 and Trillium
I compared Gur and STS-2 self-noise assuming
that Trillium noise is not worse then STS-2 |
|
7153
|
Sat Aug 11 18:57:07 2012 |
Den | Update | PEM | seismometer location | STS-2 - end of X arm
GUR 2 - isolation box
TRILLIUM - 1Y3 (DC power supply uses |
|
7157
|
Mon Aug 13 01:33:55 2012 |
Den | Update | General | Mysterious banging on emergency door |
|
|
7176
|
Tue Aug 14 11:49:15 2012 |
Den | Update | CDS | Debugging of c1sus machine and c1rfm models |
|
|
7185
|
Wed Aug 15 00:52:17 2012 |
Den | Update | WienerFiltering | filter calculation | A Matlab script to calculate Wiener filter
coefficients and convert fir to iir is ready.
Input is a file with zero mean witness and |
|
7189
|
Wed Aug 15 10:40:16 2012 |
Den | Update | CDS | aa filters | The lack of AA filter for MCL signal is
RFM model strongly disturbed entering to
OAF signal |
|
7193
|
Wed Aug 15 13:24:12 2012 |
Den | Update | CDS | RFM -> OAF | Transmission of signals between RFM and
OAF is bad again. Now we do not see any errors
in IPC_ERR monitors so models think that |
|
7226
|
Sat Aug 18 19:29:56 2012 |
Den | Update | PEM | EM 172 microphones noise | I've put EM 172 microphones inside Steve's
isolation box to measure their noise. I've
attached mics to each other and aligned them |
|
7230
|
Sun Aug 19 19:02:47 2012 |
Den | Update | CDS | PEM -> RFM -> OAF | Data from PEM now goes directly to OAF
without using RFM. Transmission RFM ->
OAF errors are gone as RFM has to read 30 |
|
7234
|
Mon Aug 20 13:02:57 2012 |
Den | Update | Adaptive Filtering | 1 Hz resonance | Static filter was adjusted to filter 1
Hz resonance in MCL and it could do it. Stack
is not great in this experiment due to the |
|
7252
|
Wed Aug 22 20:33:51 2012 |
Den | Update | Adaptive Filtering | MC_L in ARMS | Jenne and I did adaptive filtering of MC_L
and measured how X and Y ARM control signals
change compared to non-filtered MC_L. We |
|
7267
|
Fri Aug 24 00:23:20 2012 |
Den | Update | Modern Control | feedback using LQG method | I did a simulation of linear quadratic
gaussian (LQG) controller applied to local
damping. The cost function was frequency |
 |
7270
|
Fri Aug 24 13:22:19 2012 |
Den | Update | Modern Control | cavity simulation | I did a simulation of a cavity, feedback
signal was calculated using LQG controller.
I assumed that there is not length -> |
   |
7384
|
Fri Sep 14 01:05:36 2012 |
Den | Update | SUS | Mirrors being installed on active TTs |
|
|
7392
|
Fri Sep 14 21:03:02 2012 |
Den | Update | PEM | BS and AS tables | I've measured seismic and acoustic noise
on BS and AS tables. It seems that horizontal
motion of BS table is ~1.5-2 times more then |
   |
7394
|
Sat Sep 15 18:46:50 2012 |
Den | Update | PEM | microphone location | I've suspended microphones around the lab
C1:PEM-MIC_1 - MC2
C1:PEM-MIC_2
- ETMX
C1:PEM-MIC_3 - PSL
C1:PEM-MIC_4 |
|
7395
|
Sat Sep 15 20:27:54 2012 |
Den | Update | PEM | BS and AS tables |
|
 |
7412
|
Wed Sep 19 17:48:47 2012 |
Den | Update | Modern Control | ETMX | Time domain control using LQR technique
is now applied to ETMX sus position. The
plan was to do it for oplevs, I'll do it |
|
7424
|
Thu Sep 20 22:52:38 2012 |
Den | Update | MachineLearning | Feedback controller |
|
|
7428
|
Fri Sep 21 22:43:51 2012 |
Den | Update | SUS | TT alignment | I did TT alignment using red laser and
QPD.
|
6x |
7429
|
Sat Sep 22 01:03:30 2012 |
Den | Update | PEM | ETMY table | I've installed Guralp readout box back
and it turned out that it does not work with
voltage provided from the rack (+13.76 0 |
  |
7430
|
Sun Sep 23 22:40:48 2012 |
Den | Update | Modern Control | MC_L locking | I've applied LQR approach to MC_L locking.
Results show that LQR does not make MC_F
signal smaller below 0.3 Hz in contrast with |
|
7443
|
Wed Sep 26 17:09:15 2012 |
Den | Update | SUS | TT | [Koji, Steve, Den]
TT alignment is fine, yaw damping
is satisfactory, pitch damping is slow. We |
|
7483
|
Thu Oct 4 22:16:40 2012 |
Den | Update | PSL | PMC is locked | PZT monitor is not lying to us, I've measured
it with a voltmeter. But PMC SERVO is still
interesting. If I break the loop after PMCERR |
|
7485
|
Thu Oct 4 22:35:16 2012 |
Den | Update | SUS | How about the slow machines? |
|
|
7487
|
Fri Oct 5 00:29:34 2012 |
Den | Update | PEM | readout box power | Guralp readout box received +13.7 /0/ -15V
instead +15V because of the broken fuse.
Power provided by the source is normal. |
|
7488
|
Fri Oct 5 01:36:49 2012 |
Den | Configuration | PEM | changed PEM DQ channels |
|
|
7490
|
Fri Oct 5 11:11:00 2012 |
Den | Update | PEM | readout box power |
|
|
7496
|
Sun Oct 7 15:05:42 2012 |
Den | Update | SUS | MC2 sus damping restored |
|
|
7497
|
Sun Oct 7 23:39:10 2012 |
Den | Update | Modern Control | state estimation | I've applied online state estimation technique
using Kalman filter to LQG controller. It
helps to estimate states that we do not measure. |
 |
7503
|
Mon Oct 8 12:34:52 2012 |
Den | Update | Modern Control | state estimation |
|
|
7511
|
Tue Oct 9 17:16:14 2012 |
Den | Update | SUS | diagonalization | I went inside to align the beam on WFS
and noticed that oscillations in yaw are
~10 times stronger then in pitch. I've plot |
  |
7522
|
Wed Oct 10 20:27:40 2012 |
Den | Update | IOO | MCL, WFS triggers | I've added MCL and WFS stop triggers into
C1MCS/SUS model. Threshold value of MC_TRANS
can be changed in the text entry located |
 |
7525
|
Thu Oct 11 00:28:30 2012 |
Den | Update | SUS | diagonalization | I've written MC123 input matrixes to the
front-end.
MC1 diagonalization is poor, better |
 |
7526
|
Thu Oct 11 01:30:11 2012 |
Den | Update | SUS | diagonalization |
|
|
7530
|
Thu Oct 11 12:02:15 2012 |
Den | Update | IOO | FSS | FSS SLOW control did not drift during the
lock at night with MCL path working and AC
coupled. |
|
7532
|
Thu Oct 11 14:40:20 2012 |
Den | Update | SUS | diagonalization |
|
|