OPTIMAL CLOSED-LOOP INPUT SIGNAL FOR INTERNAL MODEL CONTROL

The purpose is to design an optimal input signal for internal model control. To design the optimal input signal in internal model control, we establish the equivalence between internal model control and standard closed-loop control. We consider the uncertainty between the process model, disturb model and controller. The identified model performance index is associated the mean square of the output error. An optimization problem with constrained condition according to the optimal input signal is obtained. Finally, the efficiency and possibility of the proposed strategy can be confirmed by an example.