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. 02, 2013
Filed:
Aug. 23, 2010
Method and system for robust attenuation of mechanical resonances using a multi-rate low pass filter
Applicants:
Qing Wei Jia, Singapore, SG;
Kensuke Amemiya, Singapore, SG;
Inventors:
Qing Wei Jia, Singapore, SG;
Kensuke Amemiya, Singapore, SG;
Assignee:
Hitachi Asia Ltd., Hitachi Square, SG;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05B 11/01 (2006.01); G11B 5/596 (2006.01);
U.S. Cl.
CPC ...
Abstract
A system for a providing a multi-rate digital low pass filter that attenuates high frequency resonances in a control signal. The filter described by a transfer function having a phase-advanced factor (or an approximation of phase-advanced factor) and a low pass filtering function; either cancels or avoids an unstable pole in the phase advanced factor at z=−1.