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Message ID: 7267     Entry time: Fri Aug 24 00:23:20 2012
Author: Den 
Type: Update 
Category: Modern Control 
Subject: feedback using LQG method 

I did a simulation of linear quadratic gaussian (LQG) controller applied to local damping. The cost function was frequency shaped to have a peak at 1 Hz. This technique prevents the controller from adding sensor noise at high and very low frequencies.

Noise was simulated to have 1/f spectrum (seismic) multiplied by stack with a resonance at 4 Hz with Q=5.

model.png         feedback_lqg.png

 

 

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