GAIN-SCHEDULED H-INFINITY CONTROL OF MOLTEN STEEL LEVEL IN THE MOLD OF A CONTINUOUS STEEL CASTER

This paper describes a molten steel level control in the mold of a continuous steel caster, using the Robust control method. H-infinity gain-scheduled control theory is applied to suppress fluctuations in molten steel level. The designed controller has parameters which change according to casting speed. In this paper the method of designing the controller is shown, and experimental results on various casting speeds are also shown.