Design and experimental study of an observer-based controller for a three-DOF four-wire type optical pickup head

Chang-Po Chao*, J. S. Huang, C. W. Chiu, C. Y. Shen

*此作品的通信作者

研究成果: Conference article同行評審

1 引文 斯高帕斯(Scopus)

摘要

This study presents a servo scheme synthesized via methods of sliding-mode control and high-gain observer for a newly-designed three degree-of-freedom four-wire-type lens actuator which is installed in the pickups of optical disc derives to perform data-reading. The optical pickup considered herein is a particular one that owns three degrees of freedoms, focusing, tracking and tilting. The virtual work and Lagrange's equation are used to derive the equations of motion. The sliding-mode control design is performed to conduct precision positioning of the objective lens in directions of focusing, tracking and simultaneously annihilate possible tilting for faster data-reading and better accuracy. The full-order high-gain observer is next designed to estimate the velocities of the lens to provide low-noised feedback signals for sliding-mode control. Simulations are carried out to verify the theoretical model and cthe predicted performance of designed controller and observer. Finally, experiments are conducted to validate effectiveness of the proposed controller/observer scheme.

原文English
頁(從 - 到)2457-2462
頁數6
期刊Proceedings of the American Control Conference
4
DOIs
出版狀態Published - 2005
事件2005 American Control Conference, ACC - Portland, OR, United States
持續時間: 8 6月 200510 6月 2005

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