Please use this identifier to cite or link to this item: https://doi.org/10.1109/TIE.2009.2032205
Title: A hard-disk-drive servo system design using composite nonlinear-feedback control with optimal nonlinear gain tuning methods
Authors: Lan, W.
Thum, C.K.
Chen, B.M. 
Keywords: Hard disk drive (HDD)
Nonlinear feedback
Servo system
Tracking control
Transient performance
Issue Date: May-2010
Source: Lan, W., Thum, C.K., Chen, B.M. (2010-05). A hard-disk-drive servo system design using composite nonlinear-feedback control with optimal nonlinear gain tuning methods. IEEE Transactions on Industrial Electronics 57 (5) : 1735-1745. ScholarBank@NUS Repository. https://doi.org/10.1109/TIE.2009.2032205
Abstract: This paper investigates the design of composite nonlinear-feedback (CNF) control law for a hard-disk-drive (HDD) servo system. First, a scaled nonlinear function is introduced for the CNF control law, in which a parameter is scaled by the error between the amplitude of the target reference and the initial value of the system controlled output. The closed-loop system under the scaled function has robust transient performance to the variation of the amplitude of the target reference. Then, the parameters of the selected nonlinear function are tuned by optimal tuning methods. More specifically, the parameter-tuning problem is formulated as an optimization problem, which can be solved efficiently via numerical methods. The simulation and experimental results show that the control law designed using the new approach yields excellent performance for both track seeking and track following in the HDD servo system. © 2006 IEEE.
Source Title: IEEE Transactions on Industrial Electronics
URI: http://scholarbank.nus.edu.sg/handle/10635/50841
ISSN: 02780046
DOI: 10.1109/TIE.2009.2032205
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