Patents by Inventor Fumiki Tanaka

Fumiki Tanaka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process control method and control system
    Patent number: 5025499
    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.
    Type: Grant
    Filed: April 12, 1989
    Date of Patent: June 18, 1991
    Assignees: Hitachi, Ltd., Hitachi Engineering Co., Ltd.
    Inventors: Haruki Inoue, Motohisa Funabashi, Masakazu Yahiro, Fumiki Tanaka