J. Kissel

Stefan needed measurements of the HLTS M3 stage for global angular controls (see LHO aLOG 15727), and after taking the first set I found / re-remembered that Betsy and Evan only half finished the import of LLO's damping loop design for the HLTS (see LHO aLOG 15329, and subsequent comments). As such, I've installed the complete set of filters and gains LLO HLTS damping in both H1 SUS PR3 and SR3. I attach a screen shot of how both SR3 and PR3 damping filters are configured (2014-12-18_H1SUS?R3_DAMP.png). M3 to M3 transfer functions with these new damping loops on (shown in the measurement vs. model comparison, allhltss_2014-12-18_Phase3b_H1HLTSs_M3_Don_ALL_ZOOMED_TFs.pdf) is what Stefan and Elli used for the design of the PR3 WFS / Oplev control. 

Such that design sticks, I've
- Foton File
    - Removed all old filters
    - Committed new filter file to userapps repo
- Safe.snap / EPICs configuration
    - Turned on the gain-only filters (in FM7 of every DOF), and set all of the EPICs GAINs to -1, as is the case for other suspension types (instead of having the overall gain of the loop in the EPICs GAIN field, as is done at LLO -- see LHO aLOG 15364 for documentation).
    - Turned off some M3 DRIVEALIGN elements that have been accidentally left ON
    - Captured a new safe.snap
    - Committed new safe.snap to the userapps repo.

A model of the LLO filters now exists, and lives in the following
design script: /ligo/svncommon/SusSVN/sus/trunk/HLTS/Common/FilterDesign/Scripts/design_damping_HLTS_20141218_LLO.m
stored .mat file of filters: /ligo/svncommon/SusSVN/sus/trunk/HLTS/Common/FilterDesign/MatFiles/dampingfilters_HLTS_2014-12-18.mat
model: /ligo/svncommon/SusSVN/sus/trunk/HLTS/Common/FilterDesign/MatFiles/dampingfilters_HLTS_2014-12-18_model.mat
I've attached the model figures of merit, including the loop design, global control TFs, sensor noise, actuator noise, residual seismic noise, and a total assessment of the performance (though I was lazy and didn't add the impulse response that I'd added for the BSFM, QUAD, and HSTS; Next time). Again, I don't both making a comparison with the previous filters because they weren't at all designed with any thought put into them and did not meet any kinda of desirable noise performance, have desirable global control transfer function response, nor did they have a low-Q / low-ring-down-time.

The transfer function templates live here:
PR3/SAGM3/Data/2014-12-18_2331_H1SUSPR3_M3_WhiteNoise_L_0p01to50Hz.xml
PR3/SAGM3/Data/2014-12-18_2331_H1SUSPR3_M3_WhiteNoise_P_0p01to50Hz.xml
PR3/SAGM3/Data/2014-12-18_2331_H1SUSPR3_M3_WhiteNoise_Y_0p01to50Hz.xml
SR3/SAGM3/Data/2014-12-18_2328_H1SUSSR3_M3_WhiteNoise_L_0p01to50Hz.xml
SR3/SAGM3/Data/2014-12-18_2328_H1SUSSR3_M3_WhiteNoise_P_0p01to50Hz.xml
SR3/SAGM3/Data/2014-12-18_2328_H1SUSSR3_M3_WhiteNoise_Y_0p01to50Hz.xml

I've committed new versions of
/ligo/svncommon/SusSVN/sus/trunk/HLTS/Common/MatlabTools/
plotHLTS_dtttfs_M3.m
plotallhlts_tfs_M3.m
to the SusSVN because I've updated them to include the ability to compare against a damped model and I've added the two new measurements.