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:
Jun. 26, 1990
Filed:
Mar. 17, 1989
Shigeyuki Takagi, Gifu, JP;
Teijin Seiki Company Limited, Osaka, JP;
Abstract
A stability compensating circuit of a servomechanism wherein the output displacement of an actuator is controlled, comprising: a signal source generating a reference input signal corresponding to a target value; a first summing amplifier to which the reference input signal and a signal corresponding to the actual output displacement of the actuator are inputted; a primary amplifier to which an output of the first summing amplifier is inputted and which amplifies the output of the first summing amplifier; a secondary amplifier to which an output of the primary amplifier is inputted and which further amplifies the output; a second summing amplifier to which an output of the amplifier is inputted. The circuit further comprises a first order lag circuit to which the output of the primary amplifier is also inputted and which lags the output of the primary amplifier; and a differential circuit differentiating the signal corresponding to the actual output displacement of the actuator; and a third summing amplifier to which an output of the first order lag circuit and an output of the differential circuit are inputted and which transmits to the second amplifier the difference between the outputs of the first order lag circuit and the differential circuit; the second summing amplifier outputting the error between the output of the secondary amplifier and the difference, to control the output displacement of the actuator.