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Entry  Mon Jul 21 01:02:43 2014, Koji, Mechanics, Characterization, Some structual mode analysis 6x
    Reply  Tue Sep 9 20:59:19 2014, Koji, Mechanics, Characterization, Structural mode analysis for the PZT mirror 6x
Message ID: 218     Entry time: Tue Sep 9 20:59:19 2014     In reply to: 213
Author: Koji 
Type: Mechanics 
Category: Characterization 
Subject: Structural mode analysis for the PZT mirror 

Structural analysis of the PZT mirror with COMSOL.

Inline figures: Eigenmodes which involves large motion of the tombstone. In deed 10kHz mode is not the resonance of the PZT-mirror joint, but the resonance of the tombstone.

Attached PDF: Simulated transfer function of the PZT actuation. In order to simulate the PZT motion, boundary loads on the two sides of the PZT were applied with opposite signs.
10kHz peak appears as the resonance of the tombstone dominates the mirror motion. At 12kHz, the PZT extension and the backaction of the tombstone cancells each other and
the net displacement of the mirror becomes zero.

PZT_10.0kHz.png PZT_14.6kHz.png PZT_18.0kHz.png

PZT_22.5kHz.png PZT_29.7kHz.png

Attachment 1: PZT_response_FEA.pdf  130 kB  | Hide | Hide all
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