NDLI: Micro-actuators for high density disk drives

Content Provider	IEEE Xplore Digital Library
Author	Aggarwal, S.K. Horsley, D.A. Horowitz, R. Pisano, A.P.
Copyright Year	1997
Description	Author affiliation: Comput. Mech. Lab., California Univ., Berkeley, CA, USA (Aggarwal, S.K.)
Abstract	An electrostatic actuator for use in a dual-stage disk-drive servo has been fabricated using the HexSil process. A 2.6 mm diameter device has been shown to be capable of producing 0.23 mN-mm of output torque at a predicted bandwidth of 1.6 kHz. This actuator has been fabricated through a low-cost process using reusable mold wafers. Initial continuous-time control designs for the dual-stage servo have been designed and simulated using Matlab's /spl mu/-tools. Single-input/single-output (SISO) and multi-input/multi-output (MIMO) control design methods have been shown to be capable of meeting specified uncertainty and performance specifications. Uncertainty models have included bearing effects in the disk drive arm as well as high frequency dynamics not included in the system model. Simulations using a linearized system model with the SISO design achieved a low frequency disturbance rejection of 53 dB with a bandwidth of 1.5 kHz. The MIMO design achieved a low frequency disturbance rejection of 60 dB with a bandwidth of 2.0 kHz.
Starting Page	3979
Ending Page	3984
File Size	743304
Page Count	6
File Format	PDF
ISBN	0780338324
ISSN	07431619
DOI	10.1109/ACC.1997.609645
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-06-06
Access Restriction	Subscribed
Rights Holder	American Automatic Control Council(AACC)
Subject Keyword	Microactuators Disk drives Bandwidth Mathematical model Frequency Servomechanisms Control design MIMO Uncertainty Electrostatic actuators
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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