AUTOMATIC TUNING OF PID CONTROLLER USING FUZZY LOGIC

In this paper the new methodology for designing of PID controller is presented. PID controllers are the most widely used controllers in the industry. Although much architecture exists for control systems, the PID controller is mature and well-understood by practitioners. For these reasons, it is often the first choice for new controller design. There are many methods proposed for the tuning of PID controllers out of which Ziegler Nichols method is the most effective conventional method. In this paper, optimum response of the system is obtained by using fuzzy logic controllers. The method used here is fuzzy set point weighting. A comparison of the performance of fuzzy set point weighted controller is performed not only with the conventional methods of tuning but also with different shapes and numbers of designed membership functions.