Estimated overall gain of thermal loop and two thermal poles are 106270Hz/ct, 3.89e-4Hz, and 2.22e-2Hz, respectively.
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Measured TF is consistent with one in Mar. 24. So only readout board may have had a problem. (See Fig1 and Fig2)
Actuator efficiency of heater is estimated by using actuator efficiency of PZT which was measured on Mar. 23 (klog16311). Fitted overall gain and two thermal poles are 106270 Hz/ct, 3.89e-4 Hz, and 2.22e-2 Hz, respectively. (See Fig3)
I also computed OLTF model of PMC and update calibration factors in diaggui template of PMC control signals (See Fig4, and Fig5).
According to the OLTF model, cross over frequencies and UGF are as follows.
| thermal vs PZT slow | 2.7mHz |
|---|---|
| thermal vs PZT fast | 0.26Hz |
| PZT slow vs PZT fast | 40Hz |
| UGF | 5kHz |
To do
- Measured overall OLTF and estimated current optical gain
Cross over frequency of calibrated K1:PSL-PMC_MIXER_MON_OUT and K1:PSL-PMC_PZT_HV_MON_OUT is not consistent with UGF.
This may be caused by using old value in klog5396.
UGF seems to be roughly kept as constant value by changing common gain and fast gain by guardian. On the ohter hand common gain and fast gain was changed.
So we should estimate current optical gain.
