Contrôle optimal par rétroaction de la transparence acoustique d'une plaque munie de transducteurs piézo-électriques

This note deals with optimal control with piezoelectric devices for a radiating structure excited by an unknown acoustic field. A state-space model is first identified from the Frequency Response Functions measured between the actuators and the sensors, a Linear Quadratic Gaussian controller is then synthesized to minimize a relevant acoustic index. Real-time optimal control was implemented and applied to a radiating plate enclosing a reverberant cavity.