Process control method and control system
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United States of America Patent
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Jun 18, 1991
Grant Date -
N/A
app pub date -
Apr 12, 1989
filing date -
Apr 13, 1988
priority date (Note) -
Expired
status (Latency Note)
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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.
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