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:
Aug. 02, 1994
Filed:
May. 27, 1992
Francis G Shinskey, Foxboro, MA (US);
The Foxboro Company, Foxboro, MA (US);
Abstract
An adaptive PID.tau..sub.d controller has a proportional derivative section that generates an error signal representing an error in the control signal, particularly, as a function of (i) a time rate of change of the controlled variable signal and (ii) a difference between the controlled variable signal and a predetermined setpoint. A summation element sums that error signal with a time-delayed integral signal to generate a summation signal. That summation signal, in turn, is filtered by the aforementioned adaptive noise filter to generate a manipulated variable signal, which is selectively applied to the process by an output section. A feedback element processes the manipulated variable signal to generate the time-delayed integral signal, referred to above. That processing includes time-delaying the manipulated variable signal an mount substantially equal to the deadtime of the process, .tau..sub.d, and passing that time-delayed manipulated variable signal through a first-order lag of time constant I to generate the time-delayed integral signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile