Suppression of cross-track vibrations using a self-sensing micro-actuator in hard disk drives

被引：6
|
作者：
Boettcher, Uwe [1 ]
Matthes, Liane [1 ]
Knigge, Bernhard [2 ]
de Callafon, Raymond A. [1 ]
Talke, Frank E. [1 ]
机构：
[1] Univ Calif San Diego, Ctr Magnet Recording Res, La Jolla, CA 92093 USA
[2] Western Digital Corp, San Jose, CA 95138 USA
来源：
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS | 2012年 / 18卷 / 9-10期
关键词：
Active vibration damping; Dual-stage actuator; Self-sensing-circuit; STAGE SERVO SYSTEM; PIEZOELECTRIC ACTUATORS; COMPENSATION; INTERFACE;
D O I：
10.1007/s00542-012-1533-x
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：
In this study we utilize the self-sensing capabilities of piezoelectric micro-actuators in hard disk drives (HDD) to actively suppress in-plane resonance modes of the suspension in an HDD. The self-sensing circuit is based on a tunable capacitance bridge that decouples the control signal from the sensing signal in the micro-actuator. A hybrid modeling technique based on a realization algorithm and least-squares optimization for continuous-time systems is used to model the single-input dual-output system. An analog controller was computed using standard -controller design tools and reduced in order using model reduction routines. Experimental implementation using analog filter design shows the effectiveness of the proposed method in reducing the main sway modes of the suspension.
引用
收藏
页码：1309 / 1317
页数：9
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