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Proceedings Paper

Piezoelectric ceramic assembly tubes for torsional actuators
Author(s): Chulho Kim; Alexandre E. Glazounov; Luther Daniel Flippen; Amitav Pattnaik; Qi Ming Zhang; David Lewis III
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Paper Abstract

The efforts described here are intended to provide a basis for the utilization of novel piezoelectric actuators in smart materials and structures. The actuator design developed in this study is a segmented, piezoelectric tube, with the individual segments driven in a d15 shear mode. The PZT-5A tubes were cut longitudinally in to an even number of equal slender segments. These slender segments were poled individually along their length using a continuous poling technique developed at NRL. The polarization of the poled segments alternates in direction between adjacent segments. The segments were reassembled with a conductive epoxy so that it serves as both joint and electrode. The assembled actuator tubes were evaluated by applying electric field normal to the polarization direction of the segments, demonstrating proof of concept. These solid state prototype devices were driven to precise angular displacement and torque output. Reliability test, including both fatigue and mechanical loading of the device, were conducted. In conjunction with this effort, numerical computation analyses were performed with respect to structural integrity versus segment joint thickness, and the relative effect of cylindrical versus polygonal configurations. These studies facilitated the successful production of prototypes. Projected actuator outputs based on electromechanical test results are also discussed in terms of requirements for noise and vibration control of helicopter rotor blades.

Paper Details

Date Published: 12 July 1999
PDF: 10 pages
Proc. SPIE 3675, Smart Structures and Materials 1999: Smart Materials Technologies, (12 July 1999);
Show Author Affiliations
Chulho Kim, Naval Research Lab. (United States)
Alexandre E. Glazounov, The Pennsylvania State Univ. (United States)
Luther Daniel Flippen, Naval Research Lab. (United States)
Amitav Pattnaik, Naval Research Lab. (United States)
Qi Ming Zhang, The Pennsylvania State Univ. (United States)
David Lewis III, Naval Research Lab. (United States)

Published in SPIE Proceedings Vol. 3675:
Smart Structures and Materials 1999: Smart Materials Technologies
Manfred R. Wuttig, Editor(s)

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