Simultaneous sensing and actuation using piezoelectric materials

Nesbitt W. Hagood; Eric H. Anderson

doi:10.1117/12.51196

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13 January 1992 Simultaneous sensing and actuation using piezoelectric materials

Nesbitt W. Hagood; Eric H. Anderson

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Proceedings Volume 1543, Active and Adaptive Optical Components; (1992) https://doi.org/10.1117/12.51196
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

The possibility of using a single piezoelectric element simultaneously as both a structural actuator and collocated sensor is investigated. The coupled actuator and sensor equations for an arbitrary elastic structure with piezoelectric elements are developed using an assumed modes energy method. Examination of these equations suggests a simple implementation of collocated strain or strain rate sensing using a voltage driven piezoelectric element. The properties of such a collocated strain or strain rate sensor are presented. The general equations are applied to the case of a cantilevered beam with surface mounted piezoceramics. The theoretical derivations are validated experimentally on an actively controlled cantilevered beam test article with a single piezoelectric element used for collocated strain rate feedback.

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Nesbitt W. Hagood and Eric H. Anderson "Simultaneous sensing and actuation using piezoelectric materials", Proc. SPIE 1543, Active and Adaptive Optical Components, (13 January 1992); https://doi.org/10.1117/12.51196

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