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Entry  Thu Oct 9 16:31:53 2014, ericq, Update, LSC, CARM W/N TFs carm2SQRTinv.pdfcarm2REFLDC.pdf
    Reply  Thu Oct 9 18:30:59 2014, Jenne, Update, LSC, CARM W/N TFs 6x
       Reply  Fri Oct 10 00:20:37 2014, rana, Update, LSC, CARM W/N TFs carm40.pngcarm.pdf
          Reply  Wed Oct 15 02:59:04 2014, rana, Update, LSC, CARM W/N TFs spring.pdfantispring.pdf
             Reply  Thu Oct 16 22:35:05 2014, rana, Update, LSC, CARM W/N TFs carm_spring.pdfcarm_antispring.pdf
       Reply  Wed Oct 15 13:38:33 2014, Jenne, Update, LSC, CARM W/N TFs 7x
          Reply  Mon Oct 20 17:50:30 2014, Jenne, Update, LSC, CARM W/N TFs (Others were all wrong!) 7x
Message ID: 10608     Entry time: Wed Oct 15 02:59:04 2014     In reply to: 10593     Reply to this: 10620
Author: rana 
Type: Update 
Category: LSC 
Subject: CARM W/N TFs 

 In my previous elog in this thread, I showed the CARM OLG given some new digital filters and the varying CARM plant (spring side, not anti-spring). Jenne has subsequently produced the TFs for all of the rest of the CARM offsets.

These attached plots for several CARM offsets show that the anti-spring side is much more stable than the spring side and so we should use that. Annecadotedally, we think that positive CARM offsets are more stable when going to arm powers of > 10, so perhaps this means that +CARM = -SPRING.

The first PDF shows the spring OLGs and the 2nd one shows the antispring OLGs. I have put in some gain changes to keep the UGF approximately the same as the offset is changed.

The PDF thumbnails will become visible once Q and Diego install the new nodus.

 UPDATE OCt 16: this is all wrong! bad conversion of filters within the invbilinear.m function.

Attachment 1: spring.pdf  11 kB  | Show | Hide all | Show all
Attachment 2: antispring.pdf  12 kB  | Hide | Hide all | Show all
antispring.pdf
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