Active modal control simulation of vibro-acoustic response of a fluid-loaded plate

Active modal control simulation of vibro-acoustic response of a fluid-loaded plate is presented. The active modal control of the vibro-acoustic response is implemented using piezoelectric actuators/sensors. The active modal damping is added to the coupled system via negative velocity feedback. The feedback gain between the piezoelectric actuators/sensors for the modal control is obtained using the in-vacuo modal matrix and the incompressible fluid-loaded modal matrix. The modal control performance of structural vibration and acoustic radiation of a baffled plate is numerically studied. It is shown that the proposed method increases the modal damping ratio and achieves reduction in the mean square velocity and the sound power for given modes of the fluid-loaded plate.

► Active modal control of vibro-acoustic response of a fluid-loaded plate. ► Active control using piezoelectric actuators/sensors via negative velocity feedback. ► In-vacuo and incompressible fluid-loaded modal matrices are used to get modal gain. ► Active control increases modal damping ratio of a given mode. ► Active control achieves reduction in sound power and velocity for a given mode.