Analytic solution for damping coefficients of six-wire-suspension actuator in optical pickup

Buqing Zhang; Jianshe Ma; Longfa Pan; Xuemin Cheng; Lei Zhong

doi:10.1117/12.820590

19 March 2009 Analytic solution for damping coefficients of six-wire-suspension actuator in optical pickup

Buqing Zhang, Jianshe Ma, Longfa Pan, Xuemin Cheng, Lei Zhong

Proceedings Volume 7125, Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage; 71252B (2009) https://doi.org/10.1117/12.820590
Event: Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage, 2008, Wuhan, China

Abstract

The lens actuator is one of the most important mechanical-electrical components in optical disc systems. It is used for adjusting the attitude and position of the objective lens. When it works, the resonance vibration including the first resonance and higher order resonance will happen near the resonance frequency, which will weaken the servo control capability, thus additional damper glue is necessary to restrain the resonance magnitude. In order to obtain better damping performance, the location of the damper glue and the structure of the damping filler are very important to control the resonance magnitude. In this paper, according to the flow feature of the damper glue, damping models in focusing, tracking and tilting direction are established with the help of Oseen flow equation, and equivalent damping coefficients are derived. Some samples with the design parameters are fabricated and tested, the damping coefficients obtained form the experiment are compared with the theoretical results, which shows the validity of the proposed fluid model and the design method.

Citation Download Citation

Buqing Zhang, Jianshe Ma, Longfa Pan, Xuemin Cheng, and Lei Zhong "Analytic solution for damping coefficients of six-wire-suspension actuator in optical pickup", Proc. SPIE 7125, Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage, 71252B (19 March 2009); https://doi.org/10.1117/12.820590

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KEYWORDS

Actuators

Objectives

Magnetism

Analytical research

Optical discs

Optical storage

Servomechanisms

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