engleski

Smart Double Panel with Active Damping Units Located in the Air Cavity

In this paper a theoretical analysis of smart double panel system for active structural acoustic control is presented. The system consists of two panels coupled by passive elastic mounts. The "source" panel is excited by an acoustic plane wave and the "receiver" baffled panel radiates sound into free-field. An array of decentralised feedback control units, which generates active damping, is located in the air cavity. Each control system consists of an electro-dynamic force actuator that reacts off the two panels. Velocity sensors are positioned on both panels in correspondence to the actuator location. With this arrangement direct velocity feedback loops can be implemented using independently the two error signals, so that active damping is generated either on the source or receiver panel, or using a combination of the two error signals so that damping is generated across the two panels. A fully coupled mathematical model for such a double smart panel has been developed, which considers both the coupling between the two panels via the cavity air borne path and the elastic mounts structure borne path. The model also takes into account the sensors and actuators effects. Simulations results are presented for the three control configurations with reference to a number of double panel arrangements.

active structural acoustic control; active damping; double panel; decentralised MIMO control system

nije evidentirano