EFFECT OF SECONDARY PATH NONLINEARITY IN ACTIVE NOISE CONTROL SYSTEMS BEHAVIOR

Abstract

In this paper the behavior of an active noise control system is analyzed considering the nonlinearity of the secondary path transfer function. This nonlinearity may be due to actuator saturation in the operating condition. The statistical solution of the filter weighs adaptation and convergence behavior are obtained. It is shown that the degree of nonlinearity and the error estimation of secondary path transfer function can affect the transient and steady state behavior. The saturation function is considered as a nonlinear system in adaptive filter output. This function models saturation effects in active noise control systems when the acoustic transducers are driven by large-amplitude signals.