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:
Sep. 10, 1985
Filed:
May. 14, 1984
Applicant:
Inventors:
Alexander Kade, Detroit, MI (US);
Sam M Karadsheh, Troy, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05B / ; G05B / ;
U.S. Cl.
CPC ...
318561 ; 318631 ;
Abstract
The gain of a servomotor driven process control system is adaptively compensated for changes in the motor coulomb friction torque. The gain is manually adjusted at the time of installation. Thereafter, the minimum motor current occurring in a process cycle is identified, and the gain is automatically adjusted if the identified minimum motor current changes over time, indicating a change in the motor coulomb friction torque. As a result, the level of response stability achieved at the time of installation is maintained despite changes in the motor coulomb friction torque.