corey.gray@LIGO.ORG - posted 12:22, Wednesday 28 July 2010 - last comment - 14:14, Wednesday 28 July 2010(103)
New HAM-ISI Transformation Matrices Loaded On Test Stand
Now that we've completed testing on HAM-ISI Assy #1, we wanted to update our transformation matrices to the more accepted canon (Jeff K. made a new matlab script to generate these matrices which include Celine's work that include the L4Cs among other things). Jeff G. loaded these briefly a couple of weeks ago, but we reverted to older scripts since we were still in the midst of Unit#1 testing; see his elog for the specifics on the files used & an overall explanation. Attached are the BEFORE/AFTER values for these matrices. Now, the new script matrix yields values to 12 sig figs, but EPICS rounds these values to 5 sig figs when they are loaded into our actual/medm matrices. Noticeably Different CONT2ACT Matrix The DISP2CEN & GEO2CEN matrices look fairly identical before and after this update. The noticeable change is with the CONT2ACT matrix. For this matrix, we have values at different locations and also sign changes. During the Assy #2 testing, we'll need to confirm that our sign convention is obeyed due to this matrix change.
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CONT2ACT Matrix Looks FINE! Looks like a case of Operator Error here--The matrix I loaded CONT2ACT with was actually for the L4C2CEN matrix! I've rerun the script and acquired/loaded the correct CONT2ACT matrix. Now CONT2ACT looks closer to what it was before. So, this is the mistake I ran previously: >> [GEO2CEN,DISP2CEN,CONT2ACT] = make_HAMX1_projections_100709 It should be: >> [GEO2CEN,DISP2CEN,L4C2CEN,CONT2ACT] = make_HAMX1_projections_100709 I'm attaching an updated/correct BEFORE/AFTER document.
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