Position tracking control of an optical pick-up device using piezoceramic actuator

Seung-Bok Choi; HyoungKyu Kim; SooCheol Lim; Jaehwan Kim

doi:10.1117/12.388781

19 June 2000 Position tracking control of an optical pick-up device using piezoceramic actuator

Seung-Bok Choi, HyoungKyu Kim, SooCheol Lim, Jaehwan Kim

Proceedings Volume 3984, Smart Structures and Materials 2000: Mathematics and Control in Smart Structures; (2000) https://doi.org/10.1117/12.388781
Event: SPIE's 7th Annual International Symposium on Smart Structures and Materials, 2000, Newport Beach, CA, United States

Abstract

This paper presents a new type of an optical pick-up for CD- RIM drive feeding system. The optical pick-up is activated by a pair of bimorph piezoceramic actuators in order to achieve fine motion control of the objective lens. Following the derivation of the governing equation of motion, a control model, which takes into account the hysteresis behavior of the actuator and also parameter variation such as frequency changes, is established in a state space form. A robust controller is then formulated and experimentally realized. Various position trajectories to be followed by the optical pick-up are adopted and tracking control responses are presented in time domain. In addition, control durability is demonstrated in order to provide a practical feasibility.

Citation Download Citation

Seung-Bok Choi, HyoungKyu Kim, SooCheol Lim, and Jaehwan Kim "Position tracking control of an optical pick-up device using piezoceramic actuator", Proc. SPIE 3984, Smart Structures and Materials 2000: Mathematics and Control in Smart Structures, (19 June 2000); https://doi.org/10.1117/12.388781

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