Design of controller parameters according to the transient indices using the dominant poles method

In literature, the dominant poles method is applied for the determination of controller parameters for the processes with the gain coefficient and dominant time constant equal to unity, and with the given values of relative damping coefficient and undamped (natural) system frequency. The new idea and contribution of this paper is determination of the PI controller parameters according to the given peak overshoot and time of peak overshoot by using the dominant poles method. Region in the s plane, determined by dominant poles, was changed by changed of the peak overshoot and the time of peak overshoot. The dominant poles method is applied for PI controller parameters determination of DC motor drive for different values of peak overshoot and the time of peak response. The procedure for obtaining a desired overshoot response and the most favourable controller parameters is elaborated. System´s responses to the step change of the reference signal and obtained by computer simulation are given in the paper for different values of controller parameters.