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. 03, 2001
Filed:
Dec. 29, 1999
Yoshihiro Fujisaki, Osaka-fu, JP;
Shinichi Emura, Osaka-fu, JP;
Matsushita Electric Industrial Co., Ltd., Osaka-Fu, JP;
Abstract
A motor control unit (,) includes a white noise generator (,), an instruction switch (,) for switching between an input control instruction (Vins) and a white noise output of the white noise generator (,), a controller (,) for feedback controlling the motor drive velocity, a detection unit (,) for detecting and sampling the real velocity of a motor or a load at a predetermined period, a first Fourier transformer (,) for Fourier-transforming the control instruction data (Cins) together with the sampled velocity data (Vm), and a first frequency characteristic operation unit (,) for calculating the frequency characteristics in a range from the velocity instruction (Cins) to the sampled velocity (Vm) based on output data of the first Fourier transformer (,), thus obtaining the frequency characteristics in a short period without necessity of a servo-analyzer.