Rules for Parameter Adjustment in a PI Controller for Metallurgical Heaters

摘要

The development of a set of rules (a rule base) incorporating operator experience in adjusting the parameters of a PI furnace controller is discussed. Sets of rules for the adjustment of the PI components in furnace heating and cooling are considered separately. The applicability of the rules in specific operating conditions is analyzed. The rules are verified on models of two furnaces with different dynamics. The proposals reduce overshoot due to dynamic changes, with up to 24 savings in the time required to track the settings. Thus, if a parameter-optimization system for a PI controller based on the proposed rules is used to take account of the nonlinearity of the furnace, productivity is increased and production costs fall.