Simultaneous noise and vibration control using active structural acoustic control inside an enclosed stiffened cylinder with floor structure

摘要: The concept of using an active structural acoustic control system attached to airframe structure address the problem excessive tonal interior noise levels inside vibration sensitive aerospace applications can on occasion produce unwanted simultaneous increases levels. In this paper, trade-off in global reduction performance required accommodate additional requirement there being no net increase levels, under action system, is examined. potential for controlling both and simultaneously will be discussed across different frequency cases (representing scenarios coupling complexity) example a stiffened cylinder with floor enclosed cavity. Simulation results support notion that prevention (under controlled conditions) plausible reasonable relatively small performance. This occurs when measures are considered integrally into cost function guides selection optimum actuator locations genetic algorithm search optimisation procedure.