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:
Nov. 29, 1983
Filed:
Aug. 14, 1981
Applicant:
Inventors:
Haruaki Otsuki, Shimoinayoshi, JP;
Hiromu Hirai, Yatabemachi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05B / ;
U.S. Cl.
CPC ...
318616 ; 318572 ;
Abstract
A velocity feedback circuit for a position servomechanism operative to control the position of a controlled object on the basis of the signal indicative of the difference between the position error and the velocity fed back to the input, wherein a velocity calculating circuit is provided to calculate the velocity to be fed back to the input of the position servomechanism on the basis of the relation between the time required for the controlled variable of the controlled object to make a predetermined change and the predetermined change of the controlled variable.