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:
Jul. 11, 1989
Filed:
Apr. 29, 1988
Richard F LaPrad, South Windsor, CT (US);
Gary C Horan, West Hartford, CT (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
A control system, such as for a gas turbine engine, prevents a parameter from exceeding a maximum, steady state limit using a topping loop. The topping loop compares the actual value of the parameter to a transient limit which is initially somewhat lower than the steady state limit, but can vary, at a selected rate, up to a maximum of the steady state limit. The difference between the actual value and transient limit may be used to control the system as the parameter approaches the transient limit. The transient limit, and how it varies, is selected to allow a sufficiently rapid approach of the parameter toward and up to the steady state limit, without overshooting such limit.