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Analysis of the impedance resonance of piezoelectric multi-fiber composite stacks

Show simple item record Sherrit, S. Djrbashian, A. Bradford, S C 2015-02-03T00:05:18Z 2015-02-03T00:05:18Z 2013-03-12
dc.identifier.citation 2013 SPIE Smart Structures and Materials, San Diego, California, March 12-13, 2013 en_US
dc.identifier.clearanceno 13-0787
dc.description.abstract Multi-Fiber CompositesTM (MFC’s) produced by Smart Materials Corp behave essentially like thin planar stacks where each piezoelectric layer is composed of a multitude of fibers. We investigate the suitability of using previously published inversion techniques [9] for the impedance resonances of monolithic co-fired piezoelectric stacks to the MFCTM to determine the complex material constants from the impedance data. The impedance equations examined in this paper are those based on the derivation by Martin [5,6,10]. The utility of resonance techniques to invert the impedance data to determine the small signal complex material constants are presented for a series of MFC’s. The technique was applied to actuators with different geometries and the real coefficients were determined to be similar within changes of the boundary conditions due to change of geometry. The scatter in the imaginary coefficient was found to be larger. The technique was also applied to the same actuator type but manufactured in different batches with some design changes in the non active portion of the actuator and differences in the dielectric and the electromechanical coupling between the two batches were easily measureable. It is interesting to note that strain predicted by small signal impedance analysis is much lower than high field stains. Since the model is based on material properties rather than circuit constants, it could be used for the direct evaluation of specific aging or degradation mechanisms in the actuator as well as batch sorting and adjustment of manufacturing processes. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2013 en_US
dc.subject Actuators en_US
dc.subject Piezoelectric Devices en_US
dc.subject Multi-fiber composites en_US
dc.subject Positioners en_US
dc.subject Resonance Analysis en_US
dc.title Analysis of the impedance resonance of piezoelectric multi-fiber composite stacks en_US
dc.type Preprint en_US

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