Modeling and Control of Plate Thickness in Hot Rolling Mills
| Authors: | Kugi Andreas, Saarland University, Germany
Heeg Roland, Saarland University, Germany
Fichet Olivier, AG der Dillinger Hüttenwerke, Germany
Irastorza Laurent, GTS Industries Group Dillinger Hütte, France
Pelletier Christophe, AG der Dillinger Hüttenwerke, Germany |
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| Topic: | 6.2 Mining, Mineral & Metal Processing |
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| Session: | Rolling Mills I |
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| Keywords: | hot rolling, reversing finishing mill, heavy plate thickness control, non-linear control, regularity of plate ends |
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Abstract
It is still common practice in industry to handle the thickness control problem of a rolling mill around a working point. The assumption of linearity is no longer valid if the mill is operated in a wider working range. In a reversing mill this is especially the case when the plate enters and leaves the mill stand from pass to pass. A non-linear control strategy is proposed to improve the regularity of the thickness at the ends of the plate in order to decrease the amount of the plate to be cut off by the crop shear. The performance of the controller is examined using an advanced simulation model of a finishing mill.
