jeffrey.garcia@LIGO.ORG - posted 15:13, Monday 29 August 2011 - last comment - 17:37, Wednesday 31 August 2011(1314)
First H2 ITMY Quad M0 suspension Transfer Functions
J. Kissel, J. Garcia
The attached pdf includes plots of the open-loop transfer function measurements as well as the model for each Euler-basis degree-of-freedom of the main chain (M0). The plots display the calibrated measurement of the open loop transfer function from the test excitation channels ('H2:SUS-ITMY_M0_*DoF*_EXC") to the Damping filter inputs ('H:SUS-ITMY_MO_*DOF*_IN1_DQ'). Initial measurements agree quite well with the models. More analysis and more measurements to come. The Reaction chain (R0) transfer functions were conducted on Friday as well, results to follow.
The measurement was conducted last Friday morning with the BSC-ISI Damping loops ON.
Non-image files attached to this report
Comments related to this report
To clarify a few items: 1.) These are not the first H2 ITMY QUAD M0 Transfer Functions in general, rather these are the first since the mating of the QUAD to the BSC-ISI. 2.) The Damping Loops of the BSC-ISI were ON, but local damping of the QUAD was OFF. 3.) I should note the location of the data and scripts used to plot and take the data. All data and scripts are in the SUS SVN --> '/ligo/svncommon/SusSVN/sus/trunk/' under the following sub-directories: The data file for this measurement is in '~/trunk/QUAD/H2/ITMY/SAGM0/Data/' with filename = "2011-08-25-998323873_H2SUSITMY_M0_0p01to50Hz_AllDOFs_tf.mat" Script for data collection in '~/trunk/QUAD/H2/ITMY/SAGM0/Scripts/' file name = "collectTF_20110825_H2SUSITMY_M0_0p01to50Hz_AllDOFs.m" Script for plotting in '~/trunk/QUAD/Common/MatlabTools/' file name = "plotquad_matlabtfs.m"