Design and Implementation of Two Degree of freedom Proportional Integral Derivative Controller

− The paper presents that genetic algorithm can be used for tuning two degree of freedom Proportional Integral Derivative (2DOF – PID) controller. 3rd order plant is considered to be controlled using (2DOF – PID) controller, firstly 3rd order plant has been tested without controller in closed loop system. Secondly the system response is tested with proportional controller then with conventional PID controller, Genetic Algorithm used in both cases in order to obtain optimum response and disturbance rejection. Finally, 2DOF – PID controller is considered for controlling the above plant in closed loop system. The transfer function of this controller is mathematically rearranged in order to have three parameters to be tuned using GA. Simulation results show that 2DOF – PID controller is an effective controller for tracking command signal and disturbance rejection.