二重平行リンクサスペンション形対物レンズアクチュエータの減衰設計(機械力学,計測,自動制御)

概要

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A damping design is developed to achieve heavy damping of an objective-lens actuator with dual-parallel link suspensions for CD and CD-ROM drives. The actuator is supported by four suspensions of straight bars for reducing directionally-coupled vibration. An objective value analysis is conducted to determine the desirable damping ratio at the lowest mode as well as at higher modes for high-speed access and stability of the servo system. To construct an actuator of the damping terget, we developed a damping box with gel. This system ensures heavy damping at the lowest mode ζ_0 of 0.13 and at the pitching mode ζ_<plt> of 0.1. To make the damping coefficient of pitching mode, upper suspensions have slightly elastic bending. The heavy damping of the pitching mode in the frequency band of around 1kHz can allow the assembly error of normalized center of gravity by 10%. We also developed a heavy-damping actuator with a good frequency response and with no phase disturbance.
社団法人日本機械学会の論文
1997-06-25