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. 27, 1991
Filed:
May. 02, 1989
Edgar H Bristol, Foxboro, MA (US);
Peter D Hansen, Wellesley Hills, MA (US);
The Foxboro Company, Foxboro, MA (US);
Abstract
Multivariable adaptive feedforward control may be accomplished by detecting the beginning and ending of load transients, characterizing the inputs and process result during the transient by moments, and relating the characterized inputs and process result in a general transfer function model to generate transfer functions relating the input to the output. The transfer functions coefficients are refined with successive disturbances by projecting from the current solution to the nearest point in an updated solution space. The transfer function coefficients of the selected solution are then used in compensators acting on the feedforward inputs to adjust a process control output to counteract the anticipated effects of the inputs.