Table of Contents
Smart Materials Research
Volume 2012, Article ID 920747, 7 pages
Research Article

Active Vibration Control of a Microactuator for the Hard Disk Drive Using Self-Sensing Actuation

1Department of Human and Information Systems Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
2Department of Mechanical and Systems Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
3Department of Machines and Metals, Nagoya Municipal Industrial Research Institute, 3-4-41 Rokuban, Atsuta, Nagoya 456-0058, Japan

Received 18 November 2011; Accepted 15 January 2012

Academic Editor: Tao Li

Copyright © 2012 Minoru Sasaki et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper presents the self-sensing control of a microactuator for hard disk drives. The microactuator uses a PZT actuator pair installed on the suspension assembly. The self-sensing microactuator forms a combined sensing and actuation mechanism. Direct velocity feedback and positive position feedback are used in this paper. Our experimental results show that both strategies are effective in suppressing vibrational modes and successfully demonstrate the feasibility of using a self-sensing actuator on an HDD suspension assembly.