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:
Jun. 18, 1991
Filed:
Apr. 12, 1989
Haruki Inoue, Katsuta, JP;
Motohisa Funabashi, Sagamihara, JP;
Masakazu Yahiro, Hitachi, JP;
Fumiki Tanaka, Ebetsu, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Engineering Co., Ltd., Ibaraki, JP;
Abstract
A process control system for controlling actions of a process is provided as a qualitative model to which the fuzzy theory is applied to infer and control the process. The process control system includes differentiation apparatus for determining the amounts of displacement of different process amounts with respect to time, qualitative fuzzy inference apparatus for making inference of qualitative process actions, and centroid arithmetic apparatus for converting the qualitative values of inferred control target process amounts into the appropriate amount of control.