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Title: System identification and controller design for dual actuated hard disk drive
Authors: Suthasun, T.
Mareels, I.
Al-Mamun, A. 
Keywords: Dual stage actuator
Hard disk drive
Piezo-electric micro-actuator
VCM actuator
Issue Date: Jun-2004
Citation: Suthasun, T., Mareels, I., Al-Mamun, A. (2004-06). System identification and controller design for dual actuated hard disk drive. Control Engineering Practice 12 (6) : 665-676. ScholarBank@NUS Repository.
Abstract: This paper describes classical system identification and control design techniques for the dual actuated servomechanism of a hard disk drive. The dual actuated servomechanism consists of a electromechanical coarse actuator and a piezo-electric micro-actuator. The coarse actuator provides the motion required to move the read-write head from one data track to another, while the micro-actuator improves the tracking performance of the servoloop. The micro-actuator also reduces the response time for small seek-length. A simple design approach is adopted in this paper. The coarse actuator loop is first designed for basic performance and stability, using estimated state feedback. The compensator for the micro-actuator is then designed to achieve better performance of the overall system. Simulation and experimental results underscore the effectiveness of the design. © 2003 Elsevier Ltd. All rights reserved.
Source Title: Control Engineering Practice
ISSN: 09670661
DOI: 10.1016/S0967-0661(03)00150-3
Appears in Collections:Staff Publications

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