Tracking time adjustment in back calculation anti-windup scheme

This study deals with the tuning of the tracking time parameter in the back calculation anti-windup scheme. When the controller output saturates, the back calculation method does not reset the integral action instantaneously but rather dynamically with a time constant T-t. Here, a method is presented to adjust the parameter T-t in such a way that the process output acquires a 'good' performance. The proposed method exploits the advantageous sides of 'big' and 'small' values of T-t and the value of the parameter T-t is determined based on the parameters of the preferred process model. In addition to this approach, the optimal value of this tracking time parameter is searched using a basic genetic search algorithm with Integral Time Absolute Error (ITAE) criterion. Finally, the simulation results of back calculation algorithm that uses T-t adjusted by the proposed method and T-t determined through a genetic search algorithm are compared with each other.