Optimum Design of Optical Pick-Up by Elimination of Resonance Peaks

[+] Author and Article Information
I. Kajiwara, A. Nagamatsu

Tokyo Institute of Technology, 2-12-1, O-okayama, Meguro-ku, Tokyo, 152 Japan

J. Vib. Acoust 115(4), 377-383 (Oct 01, 1993) (7 pages) doi:10.1115/1.2930360 History: Received October 01, 1991; Online June 17, 2008


A method for structural dynamic optimization is proposed using sensitivity analysis of resonance and anti-resonance frequencies. The sensitivity of the anti-resonance frequency is newly defined. An approach for eliminating the resonance peak from the frequency response function (FRF) is proposed using this sensitivity, modifying both the frequencies of this resonance and the neighboring anti-resonance bottom to the same value. The proposed method is applied to determine the optimum thickness of a plate in order to eliminate resonance peaks from its FRF. Effectiveness of this method is verified experimentally. Optimum design of an optical actuator for a compact disk player is performed practically by eliminating resonance peaks which deteriorates its servo control function. The player, with this optimized actuator, shows an excellent performance of sound playback.

Copyright © 1993 by The American Society of Mechanical Engineers
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