The Study of a Dual-Disk Type Piezoelectric Actuator

Abstract

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.

Piezoelectric Inertia Motors—A Critical Review of History, Concepts, Design, Applications, and Perspectives

“…linear sawtooth without plateau [78,249] linear sawtooth with two plateaus [24,26,117,250] square, pulse [78,138,200,[251][252][253][254][255] two superposed sines [68,77,85,86,94,171] (b) Matsuda and Kaneko [45] present a motor operating with single cosine waves. This demonstrates that an inertia motor in single-step operation does not necessarily require an asymmetric driving signal, but this signal remains unique in literature.…”

Development of inertial piezoelectric linear actuator with asymmetric design

“…Chen et al reported on an inertial piezoelectric linear actuator based on dual discs [4]. Operation of the actuator based on inertial stick -slip principle which is obtained via simultaneously excited piezoelectric bimorph discs by a single rectangular excitation signal whose frequency was equal or close to the first bending mode of discs.…”