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:
Apr. 11, 1995
Filed:
Jul. 22, 1993
Peter D Hansen, Wellesley Hills, MA (US);
The Foxboro Company, Foxboro, MA (US);
Abstract
Apparatus and method for adapting the control parameters of a self-tuning controller. The apparatus detects a closed-loop response to a naturally occurring, unmeasured disturbance and determines two characteristics, the attenuation and the period of the response. The attenuation and the period provide sufficient information to partially identify the characteristic equation of the closed-loop system. The apparatus constructs from the partially identified characteristic equation a process model that represents the general behavior of the process. The apparatus generates new control parameters more appropriate for the identified process model, and appropriately updates the controller.