Please use this identifier to cite or link to this item: https://doi.org/10.1109/TCST.2002.806437
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dc.titleDiscrete-time composite nonlinear feedback control with an application in design of a hard disk drive servo system
dc.contributor.authorVenkataramanan, V.
dc.contributor.authorPeng, K.
dc.contributor.authorChen, B.M.
dc.contributor.authorLee, T.H.
dc.date.accessioned2014-06-17T02:45:43Z
dc.date.available2014-06-17T02:45:43Z
dc.date.issued2003-01
dc.identifier.citationVenkataramanan, V., Peng, K., Chen, B.M., Lee, T.H. (2003-01). Discrete-time composite nonlinear feedback control with an application in design of a hard disk drive servo system. IEEE Transactions on Control Systems Technology 11 (1) : 16-23. ScholarBank@NUS Repository. https://doi.org/10.1109/TCST.2002.806437
dc.identifier.issn10636536
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/55665
dc.description.abstractIn a typical disk drive servo system, two or more types of controllers are used for track seeking, track following, and track setting modes. This leads to the problem of mode switching among these controllers. We present in this paper a unified control scheme, the discrete-time composite nonlinear feedback control, which can perform all the above functions in hard disk drive (HDD) servo systems with actuator saturation. The proposed scheme is composed by combining a linear feedback law and a nonlinear feedback law. The linear feedback law is designed to yield a fast response, while the nonlinear feedback law is used to increase the damping ratio of the closed-loop system as the system output approaches the command input. In the face of actuator saturation, this control law not only increases the speed of closed-loop response, but also improves the settling performance. Implementation results show that the proposed method outperforms the conventional proximate time-optimal servomechanism by about 30% in settling time.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1109/TCST.2002.806437
dc.sourceScopus
dc.subjectActuator saturation
dc.subjectHard disk drives (HDDs)
dc.subjectNonlinear control
dc.subjectServo systems
dc.typeArticle
dc.contributor.departmentELECTRICAL & COMPUTER ENGINEERING
dc.description.doi10.1109/TCST.2002.806437
dc.description.sourcetitleIEEE Transactions on Control Systems Technology
dc.description.volume11
dc.description.issue1
dc.description.page16-23
dc.description.codenIETTE
dc.identifier.isiut000180588900002
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