Against the large inertia and time-varying of bed temperature of the circulating fluidized bed(CFB)boilers

a PI-DMC algorithm was proposed.According to deviation between the actual output and predicted output

the PI controller corrected the output of dynamic matrix controller(DMC)to decrease the deviation of output between the actual system and the prediction model.Thus the effect of model mismatch and interference on control system was reduced

and the robustness and the anti-interference performance of the system were improved.The simulation results demonstrated that

this control method could adapt to the dynamic characteristics change of the bed temperature well

and the control quality was better than that of the conventional PID and DMC controller.