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TECHNICAL BRIEFS

Tuning of a Hard Disk Drive Servo Controller Using Fixed-Structure H∞ Controller Optimization

[+] Author and Article Information
Soichi Ibaraki

Department of Precision Engineering, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan e-mail: ibaraki@prec.kyoto-u.ac.jp

Masayoshi Tomizuka

Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA, 94720-1740 e-mail: tomizuka@me.berkeley.edu

J. Dyn. Sys., Meas., Control 123(3), 544-549 (Jun 09, 2000) (6 pages) doi:10.1115/1.1386391 History: Received June 09, 2000
Copyright © 2001 by ASME
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References

Figures

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Closed-loop system configuration for the H optimization problem
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Schematic view of a hard disk drive
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Simulated and measured frequency responses of the VCM actuator
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Comparison of closed-loop frequency responses under two conventional controllers (“C1”: C1(s) given in Eq. (7) and “C2”: C2(s) given in Eq. (8)) and the designed PID controller (“Cnew”) (simulation results)
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(a,b) Measured PES spectrums under the conventional controller, C2(s), and the designed PID controller, Cnew(s). (c) Comparison of closed-loop frequency responses under two conventional controllers (“C1”: C1(s) given in Eq. (7) and “C2”: C2(s) given in Eq. (8)) and the designed PID controller (“Cnew”) (simulation results).

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