- Title
- Nonlinear tracking control for a hard disk drive dual-stage actuator system
- Creator
- Zheng, Jinchuan; Fu, Minyue; Wang, Youyi; Du, Chunling
- Relation
- 2007 IEEE International Conference on Control and Automation (ICCA 2007). Proceedings of the 2007 IEEE International Conference on Control and Automation (Guangzhou, China 30 May - 1 June, 2007) p. 1501-1506
- Publisher Link
- http://dx.doi.org/10.1109/ICCA.2007.4376612
- Publisher
- Institute of Electrical and Electronics Engineers (IEEE)
- Resource Type
- conference paper
- Date
- 2007
- Description
- This paper presents a nonlinear tracking control method for a hard disk drive (HDD) dual-stage actuator (DSA) system that consists of a voice coil motor (VCM) actuator and a piezoelectric (PZT) microactuator. Conventional track seeking controllers for DSA systems were generally designed to enable the VCM actuator to approach the target track without overshoot. However, we observe that this strategy is unable to achieve the minimal settling time when the target tracks are beyond the PZT actuator stroke limit. To further reduce the settling time, we design the VCM actuator controller to yield a closed-loop system with a small damping ratio for a fast rise time and certain allowable overshoot. Then, a composite nonlinear control law is designed for the PZT actuator to reduce the overshoot caused by the VCM actuator as the system output approaches the target track. Experimental results show that the proposed dual-stage servo outperforms the conventional dual-stage servo in short-span seeking and additionally achieves better track following accuracy than the VCM only single-stage servo.
- Subject
- closed loop systems; disc drives; hard discs; microactuators; nonlinear control systems; piezoelectric actuators; servomechanisms; tracking
- Identifier
- http://hdl.handle.net/1959.13/937570
- Identifier
- uon:12584
- Identifier
- ISBN:9781424408177
- Rights
- Copyright © 2007 IEEE. Reprinted from the Proceedings of the 2007 IEEE International Conference on Control and Automation. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of University of Newcastle's products or services. Internal or 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 must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.
- Language
- eng
- Full Text
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