Aeroelastic structural acoustic control

Static, constant-gain, output-feedback control compensators were designed t o increase the transmission loss across a panel subjected to mean flow on o ne surface and a stationary, acoustic half-space on the opposite surface. T he multi-input, multi-output control system was based upon the use of an ar ray of colocated transducer pairs. The performance of the static-gain, outp ut-feedback controller was compared to that of the full state-feedback cont roller using the same control actuator arrays, and was found to yield compa rable levels of performance for practical limitations on control effort. Ad ditionally, the resulting static compensators proved to be dissipative in n ature, and thus the design varied little as a function of the aeroelastic c oupling induced by the fluid-structure interaction under subsonic flow cond itions. Several parametric studies were performed, comparing the effects of control-effort penalty as well as the number of transducer pairs used in t he control system. (C) 1999 Acoustical Society of America. [S0001-4966(99)0 1302-8].