Abstract: FEM/BEM is adopted to model the interaction between the fluid and
structures. In the modeling, modal truncation and inertial coupling are applied
to sufficiently reduce the coupled model order. This approach is adopted for
the purpose of constructing a modal model in the time domain. Active vibration
control is realized with piezoelectric actuators and an adaptive method. In the
control, the summation of vibration responses is used as the control error
since the integral of acceleration on the plate surface is approximately
proportional to the far field sound pressure. A rigidly baffled plate connected
with a mass through one piezoelectric actuator is simulated at first. In the
experiment, the plate is excited by a rotating eccentric mass and controlled
with four piezoelectric actuators. The results have shown that active vibration
control with the piezoelectric actuators can lead to a noticeable attenuation
in sound pressure.
