Design and Positioning Control of Microhead Actuator for Optical Disk Storage System   (Design Guidelines for a Collocation-Type Actuator)

Yoshito Nanjo; Ken-ichiro Shimokura; Kenji Kogure

doi:10.20965/jrm.1993.p0332

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JRM Vol.5 No.4 pp. 332-337

doi: 10.20965/jrm.1993.p0332

(1993)

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Design and Positioning Control of Microhead Actuator for Optical Disk Storage System (Design Guidelines for a Collocation-Type Actuator)

Yoshito Nanjo, Ken-ichiro Shimokura and Kenji Kogure

NTT Human Interface Laboratorires., 3-9-11, Midori-cho, Musashino-shi, Tokyo, 180 Japan

Received:

February 23, 1993

Accepted:

February 26, 1993

Published:

August 20, 1993

Keywords:

Mode of vibration, Modal parameter, Transfer function, Microhead, Disk storage system, Quasi collation, Servo system

Abstract

This paper describes the mechanical design of a microhead actuator for disk storage systems and its positioning control method. A new concept called “quasi collocation” is introduced to discuss the stability of positioning control systems for the structure. A simple actuator model is fabricated, and its dynamic characteristics are numerically and experimentally examined. On the basis of these results, a sensor and driving coils are positioned appropriately to achieve the quasi collocation. A trial servo system for this actuator experimentally confirms a wide control bandwidth beyond the mechanical resonance frequency.

Cite this article as:

Yoshito Nanjo, Ken-ichiro Shimokura, and Kenji Kogure, “Design and Positioning Control of Microhead Actuator for Optical Disk Storage System (Design Guidelines for a Collocation-Type Actuator),” J. Robot. Mechatron., Vol.5, No.4, pp. 332-337, 1993.

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