Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/69834
Title: Design and implementation of discrete-time composite nonlinear feedback law for a hard disk drive
Authors: Venkataramanan, V. 
Kemao, P. 
Chen, B.M. 
Lee, T.H. 
Keywords: Hard disk drive
Modeling
Nonlinear control
Servo systems
Issue Date: 2001
Source: Venkataramanan, V.,Kemao, P.,Chen, B.M.,Lee, T.H. (2001). Design and implementation of discrete-time composite nonlinear feedback law for a hard disk drive. Proceedings of the IEEE Conference on Decision and Control 5 : 4687-4692. ScholarBank@NUS Repository.
Abstract: A discrete-time composite nonlinear feedback control law is proposed in this paper for a hard disk drive (HDD) servo system. This control law is composed by combining a linear and nonlinear parts. The linear part is designed to yield a fast response, while the nonlinear part is to reduce overshoot of the closed-loop system as the system output approaches the step command input. This control law is more suitable for the track seeking mode of HDD servo though it can be used in the track following mode. In the face of actuator saturation, the designed control law improves the system specifications such as the rising time and the overshoot. Implementation results show that the proposed method out-performs the conventional proximate time-optimal servomechanism by 50% in seeking time.
Source Title: Proceedings of the IEEE Conference on Decision and Control
URI: http://scholarbank.nus.edu.sg/handle/10635/69834
ISSN: 01912216
Appears in Collections:Staff Publications

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