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Message ID: 10648     Entry time: Tue Oct 28 20:47:08 2014
Author: diego 
Type: Update 
Category: IOO 
Subject: IMC WFS sensing matrix measurement 

Today I started looking into the WFS problem and improvement, after being briefed by Koji and Nicholas. I started taking some measurements of open loop transfer functions for both PIT and YAW for WFS1, WFS2 and MC2_TRANS. For both WFS1 and 2 there is a peak in close proximity of the region with gain>1, and the phase margin is not very high. Tomorrow I will make measurements of the local damping open loop transfer functions, then we'll think how to improve the sensors' behaviour.

Attachment 1: 141028_MCWFS_WFS1_PIT_OL.pdf  55 kB  | Hide | Hide all
141028_MCWFS_WFS1_PIT_OL.pdf
Attachment 2: 141028_MCWFS_WFS1_YAW_OL.pdf  56 kB  | Hide | Hide all
141028_MCWFS_WFS1_YAW_OL.pdf
Attachment 3: 141028_MCWFS_WFS2_PIT_OL.pdf  56 kB  | Hide | Hide all
141028_MCWFS_WFS2_PIT_OL.pdf
Attachment 4: 141028_MCWFS_WFS2_YAW_OL.pdf  56 kB  | Hide | Hide all
141028_MCWFS_WFS2_YAW_OL.pdf
Attachment 5: 141028_MCWFS_MC2_TRANS_PIT_OL.pdf  55 kB  | Hide | Hide all
141028_MCWFS_MC2_TRANS_PIT_OL.pdf
Attachment 6: 141028_MCWFS_MC2_TRANS_YAW_OL.pdf  56 kB  | Hide | Hide all
141028_MCWFS_MC2_TRANS_YAW_OL.pdf
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