jeffrey.garcia@LIGO.ORG - posted 16:37, Monday 29 August 2011 - last comment - 17:41, Wednesday 31 August 2011(1316)
First H2 ITMY Quad R0 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 top mass reaction chain (R0). The plots display the calibrated measurement of the open loop transfer function from the test excitation channels ('H2:SUS-ITMY_R0_*DoF*_EXC") to the Damping filter inputs ('H:SUS-ITMY_RO_*DOF*_IN1_DQ'). Initial measurements agree quite well with the models. More analysis and more measurements to come. 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 R0 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/SAGR0/Data/' with filename = "2011-08-25-998352104_H2SUSITMY_R0_0p01to50Hz_AllDOFs_tf.mat" Script for data collection in '~/trunk/QUAD/H2/ITMY/SAGR0/Scripts/' file name = "collectTF_20110825_H2SUSITMY_R0_0p01to50Hz_AllDOFs.m" Script for plotting in '~/trunk/QUAD/Common/MatlabTools/' file name = "plotquad_matlabtfs.m"