In order to overcome the influence of objective parameters' variation in superheated steam temperature control upon the effectiveness of control

the fractional-order PID(FOPID) control has been combined with the generalized prective control(GPC) algorithm

constructing a FOPID-GPC algorithm.The parameters' allocation of said FOPID-GPC algorithm has certain similarity with that of traditional integer-order PID generalized predictive control algorithm

and two adjustable parameters

namely the integral step number and the differential step number

have been added

the value choice of two said parameters has very large influence upon the performance of control system.The results of emulation show that the FOPID-GPC algorithm makes the control system to have advantages of small overshoot

short regulation time

and being able rapidly to track the system

enhancing dynamic behavior of the control sytem

being able to control the steam temperature near the set value.