Performance enhancement of multi-rate controller for hard disk drives

被引：43

作者：

Hara, T ^{[1
]}

Tomizuka, M

机构：

[1] Fujitsu Labs Ltd, File Memory Lab, Atsugi, Kanagawa 2430197, Japan

[2] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1999年 / 35卷 / 02期

关键词：

estimator; Kalman filter; hard disk drive; multi-rate;

D O I：

10.1109/20.753805

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper describes a new multi-rate controller for hard disk drives, which has a modified state estimator to correct the estimated states not only at measurement instances of the position error signal but also at every control instance when updating the control input. This modification makes the control input smoother compared to the conventional multi-rate scheme. This estimator is obtained as a stochastic optimal estimator for a linear dynamic system with a 'random walk' input noise process. The effectiveness of the modified scheme is demonstrated by experiments.

引用

页码：898 / 903

页数：6

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