In this paper a novel device aimed at controlling the mechanicalvibrations of plates by means of a set of electrically-interconnectedpiezoelectric actuators is described. The actuators are embeddeduniformly in the plate wherein they connect every node on an electricnetwork to ground, thus playing the two-fold role of capacitiveelement in the electric network and of couple suppliers. Amathematical model is introduced to describe the propagation ofelectron-mechanical waves I he device; its validity is restricted tothe case of wave-forms with wave-length greater than the dimension ofthe piezoelectric actuators used. A self-resonance criterion isestablished which assures the possibility of electro-mechanicalenergy exchange. Finally the problem of vibration control in simplysupported and clamped plates is addressed; the optimal net-impedanceis determined. The results indicate that the proposed device canimprove the performances of piezoelectric actuation.
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