Importance

Loading Importance Indicators...

Abstract

An adaptive control method employs an adaptive signal generation algorithm 11 for generating an adaptive signal y(n) which cancels a cyclic signal y(n) at a measurement point 24, and an adaptive coefficient vector renewing algorithm 12 for renewing the amplitudes a(n) and phases .phi.(n) of the adaptive signal y(n). The adaptive coefficient vector renewing algorithm 12 is quasi-normalized by a sum [A(.omega.)+.gamma.]. The A(.omega.) is a gain measurement of a transfer characteristic 23, and the .gamma. is a divergence prevention constant. Hence, in a frequency region where the gain A(.omega.) is high, a step size is small so that the stability of the adaptive control method can be enhanced. In a frequency region where the gain A(.omega.) is low, the step size is large so that the adaptability can be improved. As a result, the convergence stability and the characteristic following the frequency variation are compatible with each other.

Loading the Abstract Image...

First Claim