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Issue Revue de Métallurgie
Number 6, June 2009
Page(s) 234 - 241
DOI 10.1051/metal/2009039
Published online 06 June 2009



Rev. Met. Paris, N°6 (June 2009), pp. 234-241
DOI: 10.1051/metal/2009039

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

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


Published online: 6 June 2009

Abstract
The design of a parameter-dependent controller to reject periodic mould level fluctuations at a thin slab caster is presented. These fluctuations can be related to bulging of the solidified steel shell between the supporting rolls. They deteriorate the steel quality and prohibit high speed casting. A state of the art controller has been designed to suppress these casting speed dependent fluctuations and is based on a H$\infty$-optimal controller design technique. The controller has been implemented at caster of the Corus Direct Sheet Plant in IJmuiden. Measurement results show a significant reduction of these periodic mould level fluctuations.

© La Revue de Métallurgie  2009


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