PFC optimization based new PID design for fluidized catalytic cracking unit

Proportional-integral-proportional-derivative (PI-PD) control is a modified PID control and can get improved control performance. However, limited by the complex controller parameter tuning, the PI-PD control is used in a limited scope. In order to deal with this condition, a new PI-PD control design using PFC optimization is proposed in this paper. The proposed method not only inherits the advantage of PFC, which does well in coping with the time delay, but also has the same structure as the PI-PD controller. The proposed method is tested on the preheated temperature control of crude oil in a fluidized catalytic cracking unit.