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Discrete-Time Optimal Reset Control for Hard Disk Drive Servo Systems

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4 Author(s)
Hui Li ; Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore ; Chunling Du ; Youyi Wang ; Yuqian Guo

This paper proposes a design method of discrete-time optimal reset control with the reset time instants prespecified. With a base linear system designed conventionally, the discrete-time reset law design aims at improving the system transient responses. The design method can guarantee system stability, and the controller is obtained by solving Riccati equations. The proposed design method is applied to short-span and long-span track seeking of a hard disk drive servo system. Experimental results show that the proposed design is much more capable of improving transient response than traditional control design methods.

Published in:

IEEE Transactions on Magnetics  (Volume:45 ,  Issue: 11 )