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TITLE |
A self-sensing piezoelectric actuator for collocated control |
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著者 |
Dosch, J.J.; Inman, D.J. Dept. of Mech. & Aerosp. Eng., State Univ. of New York, Buffalo, NY, |
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発表誌と |
Journal of Intelligent Material Systems and Structures vol.3, no.1 p.166-85, Jan. 1992 |
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要旨 |
A technique has been developed which allows a single piece of piezoelectric material to concurrently sense and actuate in a closed loop system. The motivation behind the technique is that such a self-sensing actuator will be truly collocated and has applications in active and intelligent structures, such as vibration suppression. A theoretical basis for the self-sensing actuator is given in terms of the electromechanical constitutive equations for a piezoelectric material. In a practical implementation of the self-sensing actuator an electrical bridge circuit is used to measure strain. The usefulness of the proposed device was experimentally verified by actively damping the vibration in a cantilever beam. (12 Refs) |