[Zurück]

R. Heeg, O. Fichet, B. Bödefeld, L. Irastorza, T. Kiefer, A. Kugi:
"Model-based control of plate thickness in heavy plates mills";
Vortrag: International Steel Conference on New Developments in Metallurgical Process Technologies (METEC InSteelCon), Düsseldorf; 11.06.2007 - 15.06.2007; in: "Proceedings 3rd International Steel Conference on New Developments in Metallurgical Process Technologies", (2007), ISBN: 978-3-514-00742-0; S. 224 - 231.

There is an ever increasing demand for higher quality of hot rolled plates on the market and for higher productivity of the plants on the side of the producer. Apart from the material quality from a control theoretic point of view quality is a synonym for holding the closest possible thickness tolerances. This contribution is concerned
with the application of new control strategies to the finishing mill stand of the AG der Dillinger Hüttenwerke, Dillingen, Germany serving to improve the regularity of the plate thickness profile over the plate length. We will show that the quality of the plates with respect to their thickness tolerances can be drastically increased by taking into account valuable plate data from previous passes in combination with accurate physics-based mathematical models of the mill stand and the rolled material. An accurate forward slip model is used to track the current plate position. Measurement results impressively prove the efficiency of the proposed control strategies.