An Optimized Cascade PI-D-P Controller for Speed Control in DC motors

This work presents a novel PI-D-P controller for application in speed control of a DC motor. The gains of the proposed controller was optimized via utilization of Particle Swarm Optimization (PSO). Performance comparison of the proposed scheme with the classical PI, PI-D and PID controllers is carried out using the performance index Integral Time Absolute Error (ITAE). In addition, some statistical approach is used to investigate the robustness of the proposed method. The results show that the proposed scheme produces a 0% overshoot, which is identical to that of the PI-D controller, and superior to that of the PI and PID controllers. Further, the proposed scheme produces a rise time and settling time of 0.0133 seconds and 0.0243 seconds respectively. The results further show that the proposed scheme provides 93% probability of producing less or equal to 0.5 % overshoot and a 99% probability of producing an overshoot smaller than 5%.