New smith predictor control using disturbance observer for steam superheater and steam pressure of the boiler

The steam superheater and the steam pressure systems are time delay systems that have poles near the origin in the left half plane or a pure integrator. Smith predictor can't be applied to these systems any more, because of the steady state error for the step disturbance. In this paper, a new Smith predictor controller is proposed for the steam superheater and the steam pressure. A disturbance observer to estimate an input disturbance and a new controller to eliminate an effect of a disturbance are proposed. The simulation results verifies the efficiency of the proposed system.

[1]  Qing-Guo Wang,et al.  Modified Smith predictor design for periodic disturbance rejection , 2004, 2004 5th Asian Control Conference (IEEE Cat. No.04EX904).

[2]  Ljubi sa S. Draganovi,et al.  A NEW SMITH PREDICTOR FOR CONTROLLING A PROCESS WITH AN INTEGRATOR AND LONG DEAD-TIME : DESIGN AND TUNING , 2022 .

[3]  Aleksandar Micic,et al.  On the modified Smith predictor for controlling a process with an integrator and long dead-time , 1999, IEEE Trans. Autom. Control..

[4]  Changqing Zhang,et al.  The Compound Control of Load Disturbance Compensator and Predictive PI for the Boiler Steam Pressure , 2006, 2006 6th World Congress on Intelligent Control and Automation.

[5]  D. P. Atherton,et al.  Modified Smith predictor and controller for processes with time delay , 1999 .

[6]  Xue-Ling Song,et al.  Robust PID control for steam superheater , 2004, Proceedings of 2004 International Conference on Machine Learning and Cybernetics (IEEE Cat. No.04EX826).