40m
QIL
Cryo_Lab
CTN
SUS_Lab
TCS_Lab
OMC_Lab
CRIME_Lab
FEA
ENG_Labs
OptContFac
Mariner
WBEEShop
|
40m Log |
Not logged in |
 |
|
Wed Jan 24 13:55:04 2018, Kira, Summary, PEM, Seismometer can insulation test 6x
|
Thu Jan 25 12:41:18 2018, Kira, Update, PEM, Seismometer can insulation test
|
Thu Jan 25 14:58:20 2018, Kira, Update, PEM, Seismometer can insulation test
|
Thu Jan 25 16:39:09 2018, Kira, Update, PEM, Seismometer can insulation test
|
Thu Feb 1 16:09:13 2018, Kira, Update, PEM, Seismometer can insulation test
|
Mon Feb 5 12:12:41 2018, Kira, Update, PEM, Seismometer can insulation test
|
Wed Feb 7 12:35:56 2018, Kira, Update, PEM, Seismometer can insulation test
|
Wed Feb 7 17:01:25 2018, gautam, Update, PEM, PID test plan    
|
Wed Feb 7 19:14:19 2018, rana, Update, PEM, PID test plan
|
Thu Feb 8 12:24:37 2018, Kira, Update, PEM, PID test plan
|
Thu Feb 8 17:32:44 2018, Kira, Update, PEM, PID test plan   
|
Fri Feb 9 15:29:32 2018, Kira, Update, PEM, PID test plan
|
Thu Feb 15 16:03:57 2018, Kira, Update, PEM, PID test plan
|
Thu Feb 22 16:16:43 2018, Kira, Update, PEM, temp sensor input
|
Mon Feb 26 16:22:10 2018, Kira, Update, PEM, temp sensor input  
|
Wed Feb 28 12:31:28 2018, Kira, Update, PEM, temp sensor input
|
Fri Mar 9 12:59:53 2018, Kira, Update, PEM, ADC noise measurement 
|
Mon Mar 26 16:10:33 2018, Kira, Update, PEM, final setup sketch   
|
Wed Apr 18 12:18:39 2018, Kira, Update, PEM, final setup sketch 7x
|
Wed Apr 18 16:59:35 2018, rana, Update, PEM, final setup sketch: EX Seis
|
Thu Apr 19 11:29:11 2018, rana, Update, PEM, PID tune
|
Mon Apr 23 20:06:35 2018, rana, Update, PEM, PID tune
|
Thu Apr 26 19:46:26 2018, rana, Update, PEM, PID Quixote
|
Tue May 1 11:15:19 2018, Kira, Update, PEM, PID Quixote
|
Tue May 1 15:23:18 2018, Kira, Update, PEM, new ADC channel setup issue
|
Thu Apr 19 12:23:30 2018, Kira, Update, PEM, final setup sketch update 
|
Thu Apr 19 18:23:51 2018, Kira, Update, PEM, final setup sketch update
|
Fri Apr 20 15:07:45 2018, Kira, Update, PEM, final setup sketch update
|
Thu May 24 16:08:12 2018, Kira, Update, PEM, parts list
|
Tue May 29 16:22:43 2018, Kira, Update, PEM, parts list  
|
Wed Jun 6 15:12:29 2018, Kira, Update, PEM, parts from lab  
|
Mon Jun 18 11:12:23 2018, Kira, Summary, PEM, finishing up work at the lab  
|
Tue Apr 24 09:10:20 2018, Kira, Update, PEM, final setup sketch
|
Mon Apr 30 15:36:18 2018, Kira, Update, PEM, final setup sketch
|
Tue May 8 10:24:10 2018, Kira, Summary, PEM, plan for this week
|
Fri May 11 11:47:33 2018, johannes, Summary, PEM, Acromag issues
|
Tue May 15 15:13:23 2018, Kira, Summary, PEM, Acromag issues
|
Thu Mar 15 17:33:56 2018, Kira, Update, PEM, test setup
|
Tue Mar 20 16:56:01 2018, Kira, Update, PEM, test setup 
|
Tue Mar 20 19:48:10 2018, gautam, Update, PEM, test setup
|
Fri Mar 23 12:00:20 2018, rana, Update, PEM, test setup
|
Fri Mar 23 12:45:08 2018, Kira, Update, PEM, test setup
|
Thu May 17 15:38:19 2018, Kira, Update, PEM, test setup with seismometer   
|
Fri May 18 14:33:34 2018, Kira, Update, PEM, test setup with seismometer
|
Mon May 21 14:17:28 2018, Kira, Update, PEM, test setup with seismometer
|
Tue May 22 14:49:03 2018, Kira, Update, PEM, test setup with seismometer
|
Wed May 23 14:50:33 2018, Kira, Update, PEM, test setup with seismometer 
|
Thu May 24 15:18:12 2018, Kira, Update, PEM, PID loop restarted
|
Thu May 31 15:48:16 2018, Kira, Update, PEM, running PID script with seismometer
|
Mon May 21 10:15:35 2018, gautam, Update, PEM, test setup with seismometer
|
Wed Feb 28 21:14:34 2018, gautam, Summary, PEM, Channel admin
|
Tue Mar 27 11:11:16 2018, Kira, Update, PEM, Channel setup
|
Thu Mar 29 17:14:42 2018, Kira, Update, PEM, PID test
|
Fri Mar 30 06:16:45 2018, rana, Update, PEM, PID test
|
Fri Mar 30 16:10:46 2018, Kira, Update, PEM, PID test
|
Wed Apr 4 16:23:10 2018, Kira, Update, PEM, PID test  
|
Fri Apr 6 16:17:20 2018, Kira, Update, PEM, PID tuning
|
Fri Apr 6 18:28:57 2018, rana, Update, PEM, PID tuning
|
Mon Apr 9 16:30:21 2018, Kira, Update, PEM, MEDM setup
|
Tue Apr 10 15:42:08 2018, Kira, Update, PEM, MEDM setup
|
Thu Apr 12 10:15:33 2018, Kira, Update, PEM, MEDM setup
|
Fri Apr 13 00:20:46 2018, rana, Update, PEM, MEDM setup
|
|
Message ID: 13736
Entry time: Fri Apr 6 18:28:57 2018
In reply to: 13735
|
Author: |
rana |
Type: |
Update |
Category: |
PEM |
Subject: |
PID tuning |
|
|
Made some changes:
- Set P and D gains to zero. We only need slow drift control.
- Changed names of the python script and .ini file to distinguish it from the FSS stuff. Lives in scripts/PEM/
- removed debug flag from argParse. To run in non-debug mode you use the "-O" option of python as usual.
- Fixed the upper/lower limit convention for the heater. Was backwards.
- Removed the "rail" function that was defined. We can just use numpy.clip since that's already built in.
There is also now a StripTool file in the scripts/PEM directory which has appropriate channel names and scales for PID loop tuning. Use this file!
I'm leaving it running over the weekend with K_I = -0.003. There is a StripTool on rossa which you can watch. The code itself is running on a tmux session on megatron. Let's ONLY run this code there until we're satisfied that things are good.
Update Sun Apr 8 00:40:11 2018: Lowered gain by factors of 3 down to -0.0001 Saturday afternoon. Seems like still oscillating a bit, now with a ~4 hour period. Setting it to -3e-5 now. Usually we have a linear feedback loop, but our actuation voltage actually gets squared (P = I^2 R) before being integrated to produce temperature. Wonder if we should think of linearizing the feedback control signal to make the loop act nicer.
Update Sun Apr 8 21:09:48 2018: Set K_I = -1e-5 earlier today. Seems to have stabilized nearly, but temperature swings are still +/- 1 K. Will need to add some proportional feedback (K_P) to increase the loop bandwidth, but system is at least sort of stable now. Probably should start construction of EY,BS systems now. |
|
|