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Entry  Mon May 7 12:57:34 2012, Den, Update, IOO, WFS noise in MC gur_suspos_coh.pngmc1_gur.pngmcl_wfs.pngwfs_servo.png
    Reply  Mon May 7 17:28:29 2012, Den, Update, IOO, WFS noise in MC wfs_limit.png
       Reply  Mon May 7 19:39:52 2012, Koji, Update, IOO, WFS noise in MC 
          Reply  Mon May 7 20:15:37 2012, Den, Update, IOO, WFS noise in MC 
Message ID: 6613     Entry time: Mon May 7 17:28:29 2012     In reply to: 6612     Reply to this: 6614
Author: Den 
Type: Update 
Category: IOO 
Subject: WFS noise in MC 

Quote:

One filter bank adds noise to WFS signals and because of that we loose coherence between MC_F and seismic motion.

 This effect is due to C1:IOO-WFS1_PIT_LIMIT=2000. When I turned if off, coherence between C1:IOO-WFS_PIT input and output signals restored

wfs_limit.png

The other thing is that WFS actuate on the angular motion, but this couples to the position motion. We need to diagonalize the actuator.

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