Real-time expert system applied to mold bath level control of continuous caster.

Abstract

Fluctuation of the mold bath level of continuous caster greatly influences the surface quality of cast slabs or bil [ets. It is difticult to maintain an optimal bath level by a PID controller and a slide gate vibration controller with fixed parameters, be- cause the characteristics of casting condition fluctuate during operation. To solve this problem, an expert ~ystem method has been applied to the mold bath leve[ control system. In this expert system operator know-howregarding 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.