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Modelling of Piezoelectric Actuator Dynamics for Active Structural Control
Nesbitt W. Hagood
Space Engineering Research Center Massachusetts Institute of Technology Cambridge, Massachusetts
Walter H. Chung
Space Engineering Research Center Massachusetts Institute of Technology Cambridge, Massachusetts
Andreas Von Flotow
Space Engineering Research Center Massachusetts Institute of Technology Cambridge, Massachusetts
The paper models the effects of dynamic coupling between a structure and an electrical network through the piezoelectric effect. The coupled equations of motion of an arbitrary elastic structure with piezoelectric elements and passive electronics are derived. State space models are developed for three important cases: direct voltage driven electrodes, direct charge driven electrodes, and an indirect drive case where the piezoelec tric electrodes are connected to an arbitrary electrical circuit with embedded voltage and current sources. The equations are applied to the case of a cantilevered beam with surface mounted piezoceramics and indirect voltage and current drive. The theoretical derivations are validated experimentally on an actively controlled cantilevered beam test article with indirect voltage drive.
Journal of Intelligent Material Systems and Structures, Vol. 1, No. 3,
327-354 (1990)
DOI: 10.1177/1045389X9000100305
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