Robust control of an acoustic cavity

This paper reports the experimental results in the application of feedback control of acoustic potential energy of an acoustic cavity as a sound-structure interaction system. The experiment concentrates on the flexible structure of the acoustic cavity where a major part of the interior noise is induced. This paper demonstrates a practical way to design a controller using minimax LQG methods. It is shown that an important step in the controller design is the proper choice of a weighting function. The results presented Are impressive and they can be further improved by a proper choice of actuator and sensor placements.