kiwamu.izumi@LIGO.ORG - posted 15:37, Friday 28 February 2014 - last comment - 15:43, Friday 28 February 2014(10423)
control signs were wrong in BS oplev loops
Stefan, Kiwamu,
We could not close the oplev damping loops today. It turned out that the oplev servo gains had been wrong since the model reboot on the last Tuesday. In fact, the signs were wrong in safe.snap file. We updated the safe file. Now they are 0.03 and -0.03 for pitch and yaw loops respectively.
The attached is the open loop transfer function with the WRONG sign (i.e. OLDAMP_P_GAIN = -0.03 ) in pitch