NDLI: Vibration control of a PZT actuated suspension dual-stage servo system using a PZT sensor

Content Provider	IEEE Xplore Digital Library
Author	Yunfeng Li Horowitz, R. Evans, R.
Copyright Year	1965
Abstract	Structural resonance modes of the head stack and suspension assembly are one of the major limiting factors for achieving higher head-positioning servo performance in hard disk drives. This paper discusses the vibration suppression control of a PZT actuated suspension dual-stage servo system. A PZT strip on a PZT actuated suspension is utilized as a vibration sensor to control both the voice coil motor (VCM) actuator butterfly mode and the suspension sway mode. The vibration suppression controller is designed using the H/sub /spl infin// control design method. Experimental results show that an attenuation of 15 dB can be achieved for both the suspension sway mode and the VCM butterfly mode, and the rms of the head off-track motion due to airflow excited vibration can be reduced by approximately 30% with the proposed vibration suppression control scheme.
Sponsorship	IEEE Magnetics Society
Starting Page	932
Ending Page	937
Page Count	6
File Size	367134
File Format	PDF
ISSN	00189464
Volume Number	39
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Vibration control Servomechanisms Sensor systems Resonance Assembly Hard disks Control systems Strips Coils Servomotors
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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