The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 10, 2001
Filed:
Oct. 19, 1998
Katsuhiro Goto, Inuyama, JP;
Tokai Rubber Industries, Ltd., Komaki, JP;
Abstract
An adaptive control method employs an adaptive signal generation algorithm,for generating an adaptive signal y(n) which cancels a cyclic signal y(n) at a measurement point,and an adaptive coefficient vector renewing algorithm,for renewing the amplitudes a(n) and phases &phgr;(n) of the adaptive signal y(n). The adaptive coefficient vector renewing algorithm,is quasi-normalized by a sum [A(&ohgr;)+&ggr;]. The A(&ohgr;) is a gain measurement of a transfer characteristic,and the &ggr; is a divergence prevention constant. Hence, in a frequency region where the gain A(&ohgr;) 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(&ohgr;) 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.
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