PURPOSE: To constitute three control systems so as not to interfere with each other, and to improve the size accuracy of a rolling material by operating a contribution portion of the control system concerned and an interference portion exerted on other control system from a controlled variable of three control systems of a plate thickness, a looper angle and a plate width of a hot rolling mill control system, and driving other two control systems by the interference portion, when an output of one control system is varied.
CONSTITUTION: This system is provided with a pre-compensator 50 for operating a target value correction corresponding to a secondary variation portion given to a control object of other control system by a control operation of one control system of a plate thickness control system, a looper angle control system, and a plate width control system, from a controlled variable given to said one control system. In this way, at the same time as the control operation of one control system, other control systems are also operated and control the secondary variation, therefore, no mutual interference is caused between three control systems of a plate thickness, a looper angle and a plate width, and the stability of the control is raised.
KATAYAMA TAKAAKI
NOSE KAZUO
KITAMURA AKIRA
