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:
Jan. 02, 2018
Filed:
Mar. 13, 2012
Hirokazu Watai, Tokyo, JP;
Kazutomo Murakami, Tokyo, JP;
Hirokazu Watai, Tokyo, JP;
Kazutomo Murakami, Tokyo, JP;
BRIDGESTONE CORPORATION, Tokyo, JP;
Abstract
A rotational signal of a generation source of a control object is detected and, when a rotational speed (frequency) varies, convergence values of filter coefficients of adaptive filtersbased on a previous control result corresponding to the frequency stored in a control deviceare retrieved and set to the adaptive filtersas initial values. The adaptive filtersare updated by using the initial values of filter coefficients and output a control signal y(t) to an ACM (actuator). LMS arithmetic unitsread a reference signal calculated from the rotational signal and an acceleration signal (error signal) e(t) detected by a sensorand carry out processing for updating the filter coefficients of the adaptive filters. The adaptive filters, based on updated filter coefficients, output the control signal y(t) to the ACM