Title :
High-displacement piezoelectric actuator utilizing a meander-line geometry I. Experimental characterization
Author :
Robbins, William P. ; Polla, Dennis L. ; Glumac, Daniel E.
Author_Institution :
Dept. of Electr. Eng., Minnesota Univ., Minneapolis, MN, USA
Abstract :
The compact linear-motion piezoelectric actuator developed has relatively large displacement capabilities. It is composed of a number of parallel bars of lead zirconium titanate (PZT) connected together in a meander-line configuration so that they are mechanically in series and electrically in parallel. The polarity of the adjacent bars is arranged so that if a given bar expands under the applied voltage, the adjacent bars contract. An electromechanical model of the actuator predicted and measurements verified that stiffeners added to the basic meander line geometry significantly increased the force output without affecting the displacement versus applied voltage relationship.<>
Keywords :
electric actuators; piezoelectric devices; PZT; PbZrO3TiO3; compact linear-motion piezoelectric actuator; displacement versus applied voltage relationship; electromechanical model; high displacement piezoelectric actuator; meander-line configuration; meander-line geometry; parallel bars; stiffeners; Bars; Contracts; Displacement measurement; Force measurement; Piezoelectric actuators; Predictive models; Solid modeling; Titanium compounds; Voltage; Zirconium;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
