Abstract: “PID controllers have been successfully used in versatile applications, especially with the aid of available mature tuning methods such as the Ziegler-Nichols method. Recently, fractional order PID controllers were proposed after a series of researches on fractional calculus. It is intriguing for the flexibility of the adoption of fractional order which is free from the limit of integer order. This paper studied the fractional order PID controller of different fraction order applied in a DC motor system. The simulation results show that the fractional order PID controllers are promising compared to the integer PID controllers.”

Keywords: fractional order, PID, parameter tuning