An on-line optimal control method based on multi-attribute performance evaluation aiming at adjusting the parameters of controllers to suppress the violent fluctuations of the flue temperature in combustion process of coke ovens is proposed

which are caused by the changes of coking time

the fluctuating calories of fuel gas and other factors. Firstly

the coke process characteristics and production demands are analyzed

and a multi-attribute performance evaluation model based on information entropy is proposed to evaluate the performance of the control system on line due to large difference in parameter periods. When the performance of the control system is unsatisfied

however

a multi-objective optimization model is established to minimize the setting time

the deviation and the deviation change of flue temperature. Then

the optimum parameters of the controller are solved by the multi-objective differential evolution algorithm. Finally

simulation results verify that this optimal control method can suppress the fluctuations of flue temperature when the calories of fuel gas and coking time are changing.