ryan.short@LIGO.ORG - posted 06:32, Tuesday 18 July 2023 - last comment - 09:14, Tuesday 18 July 2023(71434)
TOO - DHARD_Y Injection while Violin Damping
Continuing Gabriele's investigation from alog 71406
While damping violin modes in OMC_WHITENING this morning, I ran a DHARD_Y noise injection with a higher amplitude of 1.5 from 12:16 to 12:46 UTC:
resgain(1.2,5,10)resgain(0.22,3,20)resgain(0.45,2,22)resgain(2.2,1.5,23)
cheby1("BandPass",6,1,0.08,3) gain(1000)zpk([1],[0.1],1,"n")
The measurement template is saved in
/ligo/home/ryan.short/DHARD_Y_olg_shaped_exc_20230718.png
Images attached to this report
Comments related to this report
Here's the measurement of the DHARD_Y plant, together with a fit. The peak at 2.6 Hz is not yet well resolved, so we should target it with some additional noise injections.
Z, P, K of the fir in s-domain:
z = [-0.95136101+11.64945547j, -0.95136101-11.64945547j,
-0.36478703 +3.20366341j, -0.36478703 -3.20366341j,
-1.14203036 +0.27714772j, -1.14203036 -0.27714772j]
p = [-0.59076912+17.94263255j, -0.59076912-17.94263255j,
-0.52161196+15.28151683j, -0.52161196-15.28151683j,
-0.18999281 +6.5798622j , -0.18999281 -6.5798622j ,
-0.41593773 +2.9252335j , -0.41593773 -2.9252335j ,
-2.64441872 +0.j , -0.0852773 +0.j ]
k = -129105.8425258189
Images attached to this comment
