Adaptive Active Control of Noise and Vibration

This paper presents the development of a unified approach to active control of noise and vibration.The design of an active control system in initially considered on the basis of a singleinput single-output(SISO) structure.The design procedure is formulated so as to allow on-line adaptation and control,and accordingly an adaptive control algorithm is devised.The design is the extended to the case of a single-input multi-output(SIMO)control structure. The control strategies thus devised are verirfied in the cancellation of broadband noise in a free-field medium, and in vibratio suppression in a cantilever beam in fixed-free and fixed-fixed modes.A comparative assessment of the results with SISO and SIMO control structures is presented and discussed.