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A switching controller for piezoelectric microactuators in dual-stage actuator hard disk drives

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conference contribution
posted on 2024-07-09, 14:39 authored by Jinchuan ZhengJinchuan Zheng, Minyue Fu
Dual-stage actuators (DSAs) with piezoelectric (PZT) microactuators can provide faster track seeking and more accurate track following in hard disk drives (HDDs) than conventional single-stage actuators. However, one of the control challenges of the DSA systems is the PZT actuator saturation. To avoid saturating the PZT actuator, most of the existing methods either carefully design the PZT controllers with small gains or limit the amplitudes of the reference commands. This typically leads to performance conservation because the fast dynamics of the PZT is not fully utilized. Unlike the existing methods, this paper studies a switching controller that optimizes a quadratic performance cost function involving the PZT saturation model explicitly. The controller can not only guarantee the system stability in the presence of saturation but also improve the tracking speed by efficiently allocating the control efforts. Simulation results show the effectiveness of the switching controller with faster disturbance rejection.

History

Available versions

PDF (Accepted manuscript)

ISBN

9781467325752

Conference name

IEEE/ASME International Conference on Advanced Intelligent Mechatronics

Location

Kaohsiung

Start date

2012-07-11

End date

2012-07-14

Pagination

5 pp

Publisher

IEEE

Copyright statement

Copyright © 2012 IEEE. The accepted manuscript is reproduced in accordance with the copyright policy of the publisher. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

Language

eng

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