Abstract:

This presentation investigates the application of feedback control toward the problem of decreasing noise transmission through aeroelastic plates. The modeling method is discussed for a plate with pinned boundary conditions, coupled to convected fluid loading on one side, and backed by a nonconvecting acoustic environment on the opposite. A static output feedback compensator is designed to minimize the sound transmitted to the nonconvecting medium. Results from the application of this control system are compared with levels of attenuation predicted by state feedback control. Results indicate that significant reductions in transmitted noise can be achieved; however, variations in the fluid convection velocity can alter the level of performance.