Active vibration control for structural–acoustic coupling system of a 3-D vehicle cabin model

This paper presents an active vibration control system for use with structural–acoustic coupling system using piezoelectric actuators and piezoelectric sensors. For modelling a complicated 3-D vehicle cabin model, the structural–acoustic coupling system is analyzed by combining the structural data from modal testing with the acoustic data from the finite element method. Through the structural–acoustic analysis program, the control plate and the control modes are selected, which are most effective for attenuating its noise. A robust LQG controller with two sensor signal filters is designed to remove the experimental problems such as the spillover effect due to uncontrolled modes. The robust LQG controller for the structural–acoustic coupling system can reduce the interior noise of the cavity as well as the structural vibration of the cabin.