Multi variable flatness control system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Apr 13, 2004
Grant Date -
May 2, 2002
app pub date -
Aug 17, 2001
filing date -
Aug 18, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Method of measuring and/or controlling flatness during rolling. The flatness deviation is measured and expressed using orthogonal polynomials. A controlled variable is generated using an Internal Mode Control by comparing the expressed deviation with values of orthogonal polynomials supplied by a model. The comparison provides a control difference to control variables that influence bending, pivoting and axial displacement of the rolls and by multizone cooling.
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