Method and apparatus for controlling flatness of strip in a rolling mill using fuzzy reasoning
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United States of America Patent
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Aug 17, 1993
Issued Date -
N/A
app pub date -
Jan 5, 1993
filing date -
Dec 28, 1988
priority date (Note) -
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Abstract
A rolling mill comprising an actuator for controlling shapes or conditions of work roll surfaces during rolling and a flatness meter for detecting broadwise flatness of rolled strip to generate an output signal whereby the actuator is operated so as to control the flatness of strip, the output signal being analyzed into a plurality of evaluation indexes. Each of the evaluation indexes is converted by a membership function into a fuzzy quantity having one of a predetermined number of values. These fuzzy quantities are subjected to fuzzy reasoning consisting of a plurality of control rules to set the control value of the actuator.
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