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Mathematical Problems in Engineering
Volume 2013 (2013), Article ID 108912, 10 pages
Research Article

The Study of a Dual-Disk Type Piezoelectric Actuator

Department of Mechanical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan

Received 30 June 2013; Revised 7 November 2013; Accepted 7 November 2013

Academic Editor: Evangelos J. Sapountzakis

Copyright © 2013 W. M. Chen 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 study presents an innovative piezoelectric actuator, capable of long travel distance and fast speed. Main components of the actuator include a rod and two piezoelectric buzzers of disk geometry. Being subject to the piezoelectric force and Coulomb friction, the piezoelectric actuator can move rapidly. Equations of motion are derived based on piezoelectric properties and Newton’s law. Static and kinetic friction effects are incorporated. Stress and strain calculations and piezoelectric equations are included in derivation. Circular plate models with polar coordinates are used to account for piezoelectric properties of buzzers. Experimental results are compared with theoretical results. According to experimental results, the present actuator can move at the speed of 37.5 mm/sec and generate the force of 15.4 mN.