Evolutionary PID control of non-minimum phase plants

In this paper, the application of PID control to three non-minimum phase plants has been examined through a series of simulation studies. Initially, Ziegler-Nichols rules have been used for tuning the PID controller. Later, an intelligent strategy - Differential Evolution has been proposed in order to tune automatically the PID controller. The effectiveness of the proposed method is investigated and it is found that the systems are with better results, in the aspects of rise time, settling time, steady-state error, peak overshoot and maximum undershoot.