Modified PID controller for avoiding overshoot in temperature of barrel heating system

The control of temperature in the different zones of barrel heating system in plastic molding machine is a challenging task, as it requires quick rise time without overshoot. The conventional PID controller does not produce the desired performance for this application. This paper ends in presenting the idea of using PI-PD controller-a modified structure of PID controller for controlling the temperature of the melt in the barrel. Fuzzy logic technique is used for obtaining the optimum values of the controller parameters. The controller is modeled in SIMULINK. From the simulation results, it is observed that the fuzzy tuned PI-PD controller outperforms the other controllers namely Ziegler-Nichols tuned PID controller, Fuzzy Logic controller and Fuzzy tuned PID controller.