A CSEA Approach to Active Noise and Vibration Control

This proposal presents a program for the continued development of CSEA-ANVC: the application of "complex SEA" to problems in active noise and vibration control. It deals with a situation that has been intractable for ANVC - the cancellation of transientdisturbances in modally rich and highly resonant structures and acoustical spaces. CSEA solves this problem by in effect modifying the structural transfer function so that small changes in structural stress or geometry that occur naturally do not cause thelarge changes in magnitude and phase of the transfer function to affect the estimation of the disturbing force that is necessary for feed-back ANVC. The proposal describes how we propose to continue the development of this procedure and how we will preparefor commercialization beyond Phase II. That development is carried out by a combination of experimental studies of a truss structure similar to that of a space telescope excited by various positioning and connect/disconnect devices in the system. The finalstep in the Phase II effort is the preliminary design of an embedded processor system that will serve as a prototype for the CSEA-ANVC product.