System identification and vibration control for composite structures with embedded actuators

摘要

The active control of vibration using point actuators has received much attention especially for aircraft and aerospace structural applications. Presented here is a means by which acoustically excited panel vibrations may be controlled through the action of a single actuator. The actuator consists of a single-sheet piezoceramic embedded in a composite panel. A robust control algorithm is implemented to attenuate the dominant modes of the panel response. The sensing is provided by a second piezoceramic also embedded in the panel. Beside the system identification, special emphasis is given to the robust controller design based on H$+$INF$/ methods. The presented results demonstrate the effectiveness of a parallel H$+$INF$/- controller design procedure achieving significant attenuation levels in a broad frequency band.