Follow up to Oli's measurements on [LHO: 87362].

We fit the eight (yes, eight!) transfer functions needed for a full L-P M1 OSEM estimator for PR3. The measurements for PR3 were remarkably clean, so it was pretty close to just automated. I spent a lot of time cleaning up Ivey's code so it hopefully can be scaled up to other suspensions more easily.

The relevant fits are shown in the attached .pdf They are suspoint {L,P} to M1 {L,P} (4 fits), and M1 drive {L,P} to M1 {L,P} (4 fits). The estimator's control stability only depends on the M1 drive models, which are fit surprisingly well.

I will note that the L-P plant for PR3 is remarkably reciprocal, and I actually expect to see good performance of the estimators when we try them.

The fits were committed to the sus svn together with a script to install them under revision 12734.

The files live in (svnRoot)/sus/trunk/HLTS/Common/FilterDesign/Estimator/ and are named:

make_PR3_estimator_LP.m
fits_H1PR3_LP-2025-10-07.mat

_______________

These are the .zpk for the fits:

SUSPOINT TO M1
 
Suspoint L to M1 L fit
zpk([0,0,-0.223-4.338i,-0.223+4.338i,-0.04-7.231i,-0.04+7.231i,-0.122-15.233i,-0.122+15.233i],[-0.07-4.099i,-0.07+4.099i,-0.111-4.714i,-0.111+4.714i,-0.11-9.997i,-0.11+9.997i,-0.234-18.094i,-0.234+18.094i],-0.001)
 
Suspoint L to M1 P fit
zpk([0,0,0.954-6.919i,0.954+6.919i,-0.925-7.247i,-0.925+7.247i,-0.03-17.396i,-0.03+17.396i,-0.026-20.357i,-0.026+20.357i],[-0.083-4.115i,-0.083+4.115i,-0.09-4.669i,-0.09+4.669i,-0.107-9.984i,-0.107+9.984i,-0.288-13.181i,-0.288+13.181i,-0.275-18.054i,-0.275+18.054i,-0.084-22.109i,-0.084+22.109i],0.373)
 
Suspoint P to M1 L fit
zpk([0,0,-0.204-4.277i,-0.204+4.277i,-0.081-9.662i,-0.081+9.662i,0.016-17.983i,0.016+17.983i],[-0.044-4.018i,-0.044+4.018i,-0.102-4.661i,-0.102+4.661i,-0.028-9.938i,-0.028+9.938i,-0.018-18.044i,-0.018+18.044i],0)
 
Suspoint P to M1 P fit
zpk([0,0,-0.02-4.046i,-0.02+4.046i,-0.005-4.779i,-0.005+4.779i,0.017-5.716i,0.017+5.716i,0.003-9.719i,0.003+9.719i,-0.175-9.79i,-0.175+9.79i,0.075-13.176i,0.075+13.176i,0.001-22.098i,0.001+22.098i],[-0.01-4.018i,-0.01+4.018i,-0.06-4.157i,-0.06+4.157i,-0.06-4.653i,-0.06+4.653i,-0.007-4.797i,-0.007+4.797i,0-9.765i,0+9.765i,-0.017-9.957i,-0.017+9.957i,-0.036-13.12i,-0.036+13.12i,-0.019-22.115i,-0.019+22.115i],-0.001)
 
 
M1 DRIVE TO M1
 
M1 drive L to M1 L fit
zpk([-0.137-4.329i,-0.137+4.329i,-0.017-5.169i,-0.017+5.169i,-0.037-12.394i,-0.037+12.394i],[-0.098-4.128i,-0.098+4.128i,-0.09-4.66i,-0.09+4.66i,-0.103-9.985i,-0.103+9.985i,-0.245-18.089i,-0.245+18.089i],0.142)
 
M1 drive L to M1 P fit
zpk([1.391-5.654i,1.391+5.654i,-1.723-6.019i,-1.723+6.019i,-9,12.605,0.233-16.247i,0.233+16.247i,-0.042-19.777i,-0.042+19.777i],[-0.093-4.125i,-0.093+4.125i,-0.088-4.646i,-0.088+4.646i,-0.102-9.984i,-0.102+9.984i,-0.292-13.17i,-0.292+13.17i,-0.264-18.072i,-0.264+18.072i,-0.085-22.117i,-0.085+22.117i],0.119)
 
M1 drive P to M1 L fit
zpk([1.425-5.579i,1.425+5.579i,-1.619-6.117i,-1.619+6.117i,-9.724,13.511,0.26-16.388i,0.26+16.388i,-0.122-19.664i,-0.122+19.664i],[-0.092-4.129i,-0.092+4.129i,-0.097-4.664i,-0.097+4.664i,-0.081-9.967i,-0.081+9.967i,-0.298-13.165i,-0.298+13.165i,-0.27-18.058i,-0.27+18.058i,-0.08-22.14i,-0.08+22.14i],0.115)
 
M1 drive P to M1 P fit
zpk([-0.068-4.408i,-0.068+4.408i,-0.012-5.489i,-0.012+5.489i,-0.108-10.011i,-0.108+10.011i,-0.023-21.169i,-0.023+21.169i],[-0.089-4.125i,-0.089+4.125i,-0.079-4.666i,-0.079+4.666i,-0.104-9.96i,-0.104+9.96i,-0.29-13.181i,-0.29+13.181i,-0.084-22.141i,-0.084+22.141i],82.922)