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Compensator design for the mould level of a thin slabcaster to suppress periodic fluctuations

Published online by Cambridge University Press:  06 June 2009

C.-W.-J. Hol ,
V. Beentjes ,
B. Middel ,
A. Kamperman  and
J. Lagerberg
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Abstract

The design of a parameter-dependent controller to rejectperiodic mould level fluctuations at a thin slab caster ispresented. These fluctuations can be related to bulging ofthe solidified steel shell between the supporting rolls. Theydeteriorate the steel quality and prohibit high speed casting.A state of the art controller has been designed to suppressthese casting speed dependent fluctuations and is basedon a H∞-optimal controller design technique. The controllerhas been implemented at caster of the Corus Direct SheetPlant in IJmuiden. Measurement results show a significantreduction of these periodic mould level fluctuations.

Type
Research Article
Information
Metallurgical Research & Technology , Volume 106 , Issue 6: SinteringContinuous CastingCold RollingStainless Steel , June 2009 , pp. 234 - 241
Copyright
© La Revue de Métallurgie, 2009

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