Abstract
Fluctuation of the mold bath level of continuous caster greatly influences the surface quality of cast slabs or billets. It is difficult to maintain an optimal bath level by a PID controller and a slide gate vibration controller with fixed parameters, because the characteristics of casting condition fluctuate during operation. To solve this problem, an expert system method has been applied to the mold bath level control system. In this expert system operator know-how regarding control parameter adjustment is represented in the form of a knowledge base, and that knowledge base is driven by inference engine when a significant fluctuation of the mold bath level occurs. This system has been applied to a continuous round caster, and has effectively regulated the mold bath level fluctuation by adjusting the controlling parameters to optimize the state of operation when the fluctuation occurred.
