Fractional Order PID Control Applied to a Pasteurization Plant

Milk pasteurization is complex and nonlinear, challenging to manage with traditional controllers such as ON-OFF or PID. This study examines fractional-order PID (FO-PID) control due to its ability to handle numerous variables effectively. The FO-PID controller ensures performance and robustness to maintain the required temperature limits. Using the Armfield Process Plant Trainer, PCT23MKII, a realistic small-scale model of a pasteurizing process is established. This system includes high-/low-level switches and two-way solenoid valves for tank filling operations. The results indicate that FO-PID extends the functionality of classical PID controllers by enhancing the delivery of the control signal.