Vibration control in plates by uniformly distributed PZT actuators interconnected via electric networks

Stefano Vidoli (1) , Francesco Dell'Isola (1, 2)

1 Dipartimento di Ingegneria Strutturale e Geotecnica
2 Laboratorio Strutture e Materiali Intelligenti - Fondazione Tullio Levi-Civita

In this paper a novel device aimed at controlling the mechanical vibrations of plates by means of a set of electrically-interconnected piezoelectric actuators is described. The actuators are embedded uniformly in the plate wherein they connect every node of an electric network to ground, thus playing the two-fold role of capacitive element in the electric network and of couple suppliers. A mathematical model is introduced to describe the propagation of electro-mechanical waves in the device; its validity is restricted to the case of wave-forms with wave-length greater than the dimension of the piezoelectric actuators used. A self-resonance criterion is established which assures the possibility of electro-mechanical energy exchange. Finally the problem of vibration control in simply supported and clamped plates is addressed; the optimal net-impedance is determined. The results indicate that the proposed device can improve the performances of piezoelectric actuation.

Domaines: Mécanique [physics.med-ph]

Stefano Vidoli, Francesco Dell'Isola. Vibration control in plates by uniformly distributed PZT actuators interconnected via electric networks. European Journal of Mechanics - A/Solids, 2001, pp.22. ⟨hal-00496588⟩