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:
May. 21, 2019
Filed:
Nov. 15, 2013
Hitachi, Ltd., Chiyoda-ku, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A sinusoidal signal that is frequency-swept so as to have a frequency region in which each frequency has a different number of cycles and/or application duration is applied to a control system in a movement device that moves a movement target, time-series data for transmission characteristics obtained from said control system as a result of the application of the aforementioned sinusoidal signal is acquired, and said time-series data is subjected to spectral analysis. This allows the provision of a positioning control device and a frequency-characteristics measurement method that make it possible to optimize measuring precision while minimizing increases in the amount of time it takes to measure frequency characteristics.