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dc.titleA hard-disk-drive servo system design using composite nonlinear-feedback control with optimal nonlinear gain tuning methods
dc.contributor.authorLan, W.
dc.contributor.authorThum, C.K.
dc.contributor.authorChen, B.M.
dc.identifier.citationLan, 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.
dc.description.abstractThis 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.
dc.subjectHard disk drive (HDD)
dc.subjectNonlinear feedback
dc.subjectServo system
dc.subjectTracking control
dc.subjectTransient performance
dc.contributor.departmentELECTRICAL & COMPUTER ENGINEERING
dc.description.sourcetitleIEEE Transactions on Industrial Electronics
Appears in Collections:Staff Publications

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