= ITMY =
- I have closed the control loops for the GAS filters (except for the F0, dc+damping) anyhow. So far, they have been opened for the purpose of model-restarting campaign (also since hieght adjustment by FR had been necessary). Some line(s) in BF-GAS-LVDT at 238Hz (and 28Hz) were still noisy, although I have added some nothces. They are to be fixed. We might have to check the LVDT board setting etc.
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The target positions of the dc-control were set at (F1, F2, F3, BF) = (840, -55, 735, -1930), for K1:VIS-ITMY_${stage}_DAMP_GAS_OFFSET (stage=F1 etc).
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This tartgets (K1:VIS-ITMY_${stage}_DAMP_GAS_OFFSET) are now a bit different from the ones which were set when the ITM height check had done (klog#8871).
- So far, (F1, F2, F3, BF) = (840, -55, 800, -1643), on May 13th 219, just after the height adjustment [1].
- The target of BF-GAS and F3 will be checked more concretely.
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This tartgets (K1:VIS-ITMY_${stage}_DAMP_GAS_OFFSET) are now a bit different from the ones which were set when the ITM height check had done (klog#8871).
- At the height, TM transfer functions in P/Y has changed a bit compared to the klog#9011, as shown in the attachements. The cyan, orange and blue curvers coorespond to; the healthy ones (of ETMY), measurement in klog#9011 and today's new measurement.
- Since I could not get any good sense where would be the good position for both the payload and GAS, at those position, I have termineted this investigation today.
Notes
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[1] Note that when the transfer function measurement in klog#9011 was done, the height was:
- (F1, F2, F3, BF) = (-830, 200, -650, 1650) in K1:VIS-ITMY_${stage}_DAMP_GAS_IN.
- When I lowered the height of the GASs (it was too much indeed), TM-olpev spot was not shifted in Yaw with BF-damper, even though BF-Yaw and MN-Yaw was shifted, according to the oplev. RM might be close to something. This issue went away after adjusting the GAS height.
