IEEJ Transactions on Industry Applications
Online ISSN : 1348-8163
Print ISSN : 0913-6339
ISSN-L : 0913-6339
Paper
Design of Sensitivity Function of Multi-Rate VCM Control System
Masashi Kisaka
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2011 Volume 131 Issue 8 Pages 1087-1092

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Abstract
The method for designing the sensitivity function of a multiple-input single-output servo system is proposed. The method does not require weight or a weight function unlike linear quadratic (LQ) or H design. First, a controller candidate is derived by taking into consideration the specification of robustness of the plant system. Then, the sensitivity function is derived from the gain specification of the sensitivity function. As the design of a multi-rate controller can be shown to be equivalent to the multiple-input single-output system, the method is employed to design the multi-rate VCM position control system. The multi-rate controller is designed such that at frequencies higher than the Nyquist frequency, the desired robustness is achieved.
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© 2011 by the Institute of Electrical Engineers of Japan
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