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. 23, 1994
Filed:
May. 27, 1992
Francis G Shinskey, Foxboro, MA (US);
The Foxboro Company, Foxboro, MA (US);
Abstract
The invention provides improved methods and apparatus for determining characteristics of a process--such as primary and second time constants, dead-time, and gain--by applying a doublet pulse to the process and measuring its response. By way of example, in one aspect of the invention, there is provided a method for generating a signal, .tau..sub.1, representing an estimate of a primary time constant of a non-self-regulating process, in accord with the mathematical expression .tau..sub.1 =(.delta.m.tau..sub.a.sup.2)/A.sup.+ is a factor representing the time-wise integration of the controlled variable during the period when the doublet pulse is being applied .delta.m is a factor representing an amount by which the manipulated variable is incremented, and .tau..sub.a represents the time period over which the controlled variable signal changes from its original value by a predetermined amount.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile