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Microsystem Technologies

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29-11-2016 | Technical Paper

Self-sensing actuation for improved audio-induced vibration rejection in dual-stage hard disk drives

Authors: Bin Hu, Jie Wan, Chee Khiang Pang

Published in: Microsystem Technologies | Issue 11/2017

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Abstract

In this paper, a general circuit topology of enhanced indirect-driven self-sensing actuation (EIDSSA) is proposed to allow independent design of actuation and self-sensing in piezoelectric-actuated systems. Sensitivity analysis is performed in terms of suspension structural dynamics, geometric amplification and material property. The proposed EIDSSA circuit topology is realized and incorporated into a commercial dual-stage hard disk drive to improve the rejection capability of audio-induced vibrations. Experimental results show that the on-track total-runout has been reduced by 8.89% in pink noise audio-induced vibrations and 25.2% in single-tone 2.5 kHz audio-induced vibrations without additional loop tuning efforts.

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Title: Self-sensing actuation for improved audio-induced vibration rejection in dual-stage hard disk drives
Authors: Bin Hu
Jie Wan
Chee Khiang Pang
Publication date: 29-11-2016
Publisher: Springer Berlin Heidelberg
Published in: Microsystem Technologies / Issue 11/2017
Print ISSN: 0946-7076
Electronic ISSN: 1432-1858
DOI: https://doi.org/10.1007/s00542-016-3218-3

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