APPLICATION OF GENERALIZED DYNAMIC MATRIX CONTROL WITH STATE OBSERVER IN POSITION

SERVO SYSTEM OF STRIP MILL

WANG Yiqun  SUN Menghui  ZHANG Wei  LIU Jian

(College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004)

Abstract: The structure of the strip mill is complicated, and its control system becomes more and more precise and intellective. But the PID control strategy, being comprehensively used in the locale, is difficult to satisfy the request of improving the control precision of the strip mill, because the robust is not very well. So the generalized dynamic matrix control was applied to de-sign the predictive controllers in position servo system of strip mill, and strategy of the receding-horizon optimization, and the feedback correction were adopted. The state observer was constructed, which made the control system have the state feedback form with the observer, and strengthened the robust of the sys-tem by correcting the predictive model. The control algorithm has the strong stability and the robust, based on the system step response. At the same time, the realization strategy of the computer control was provided. The method is easy to be realized and has intelligent capability. The simulation result indicates that the control effect using the presented method is better than that using the traditional PID control which is comprehensively used in the strip production.

Key words: Generalized dynamic matrix control Strip mill Position servo system State observer

CLC No: TG334.9 TP273

国家自然科学基金(60474044)和河北省自然科学基金(E200400022)资助项目. Received 20060911, received in revised form 20070426