Compensator design for a dual-stage actuator in the track-following servo system of optical disk drives

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In this paper, a compensator design method is presented for track-following control in an optical disk drive, a common mechanism for which is a dual-stage actuator composed of a fine and a coarse actuators. Most of previous works, however, have focused on tracking precision enhancement using only the fine actuator without systematic design method for a coarse actuator compensator. As the dual-stage actuator is categorized as a dual-input single-output system, the overall stability is affected not only by the fine actuator but also by the coarse actuator. In addition, the coarse actuator compensator should satisfy a performance specification to prevent overall system failure. The PQ design method,is slightly modified based on the obvious difference between the bandwidths of the two actuators, and then two compensators can be designed independently. It is proved that the overall system stability is ensured by the designed compensators, and performance specifications, are also satisfied. Validity of the design method is proved by some simulations and experiments.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2005-05
Language
English
Article Type
Article
Citation

IEEE TRANSACTIONS ON CONSUMER ELECTRONICS, v.51, pp.471 - 477

ISSN
0098-3063
URI
http://hdl.handle.net/10203/89878
Appears in Collection
EE-Journal Papers(저널논문)
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