Temperature Control of Electric Heating Dryers Using Hybrid Control with the Immune and PD

A hybrid control method with the immune and proportional-derivative (PD) control was presented aiming at the temperature control characteristics of electric heating dryers. The hybrid control consists of the parallel construction of the two-cell immune control and conventional PD feedback control. The immune controller has strong robustness and adaptability, and one-order integral characteristics. Therefore, the immune controller can realize the adaptive and constant control of the system with no error, and the PD controller can realize stability and rapidity. Simulation for the temperature control of electric heating dryer was carried out under such a control that has parameter uncertainty. The results verify that this hybrid control is better rapidity, smaller overshoot, and better robustness than a proportional-integral-derivative (PID) control. The temperature control obtains satisfactory control effectiveness