Mathematics – Dynamical Systems
Scientific paper
Jan 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992spie.1543..409h&link_type=abstract
In: Active and adaptive optical components; Proceedings of the Meeting, San Diego, CA, July 24-26, 1991 (A93-39559 15-74), p. 40
Mathematics
Dynamical Systems
3
Active Control, Actuators, Elastic Properties, Piezoelectric Transducers, Strain Gages, Strain Rate, Cantilever Beams, Dynamical Systems, Feedback Control, Mathematical Models, Rayleigh-Ritz Method
Scientific paper
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.
Anderson Eric H.
Hagood Nesbitt W.
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