A DUAL STAGE MAGNETIC DISK DRIVE ACTUATOR USING A PIEZOELECTRIC DEVICE FOR A HIGH TRACK DENSITY

被引：168

作者：

MORI, K ^{[1
]}

MUNEMOTO, T ^{[1
]}

OTSUKI, H ^{[1
]}

YAMAGUCHI, Y ^{[1
]}

AKAGI, K ^{[1
]}

机构：

[1] HITACHI LTD, CENT RES LAB, KOKUBUNJI, TOKYO 185, JAPAN

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1991年 / 27卷 / 06期

关键词：

D O I：

10.1109/20.278818

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：

We developed a dual-stage actuator using a piezoelectric device for a magnetic disk drive with a high track density over 15 kTPI (tracks per inch). Conventional head positioning uses a VCM (Voice Coil Motor), whose actuator bandwidth limit makes it difficult to increase the track density by improving the accuracy of head positioning. The dual-stage actuator presented here uses a VCM rotary actuator as a coarse actuator and a piezoelectric actuator installed in a head-arm as a fine actuator. The stroke of the fine actuator is 4.6-mu-m, which is sufficient for a track pitch of 1.5-mu-m at 17 kTPI. The head position is detected by an optical method using a dot-pattern etched on a disk. This paper describes the design of the dual- stage actuator including structural analysis, its static and dynamic characteristics, dual-stage feedback control system, and experimental results of tracking with high accuracy on a 3.5" disk-drive unit.

引用

页码：5298 / 5300

页数：3

共 5 条

[1]

AKAGI K, 1991, IEEE MAGNET, V27

[2]

FUTAMOTO M, 1991, ASME J DYNAMIC SYSTE

[3]

FUTAMOTO M, 1991, IEEE MAGNET, V27

[4] Analysis and Synthesis of Discrete-Time Repetitive Controllers [J].

Tomizuka, Masayoshi ;

Tsao, Tsu-Chin ;

Chew, Kok-Kia .

JOURNAL OF DYNAMIC SYSTEMS MEASUREMENT AND CONTROL-TRANSACTIONS OF THE ASME, 1989, 111 (03) :353-358

[5] TRACK-FOLLOWING CONTROLLER-DESIGN FOR A COMPOUND DISK DRIVE ACTUATOR [J].

YEN, JY ;

HALLAMASEK, K ;

HOROWITZ, R .

JOURNAL OF DYNAMIC SYSTEMS MEASUREMENT AND CONTROL-TRANSACTIONS OF THE ASME, 1990, 112 (03) :391-402

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