| 摘要 |
PURPOSE: A rolling mill and a control method thereof are provided to calculate disturbance by using tension deviation, speed deviation, and thickness deviation, and to control of a stand by reflecting the calculated disturbance, thereby improving the accuracy rate of thickness. CONSTITUTION: A rolling mill and a control method thereof comprise multiple stands(101,102,103,104), an automatic thickness control system(120), and multiple disturbance compensation units(106,108,110). The stand comprises an upper roll and a lower roll, and continuously rolls and outputs an input material at a fixed speed. The automatic thickness control system controls the pressure load of the stands. The disturbance compensation units are positioned respectively among the multiple stands. The i-th(i is a natural number) disturbance compensation unit supplies the information of a speed compensation value to the automatic thickness control system to control the speed of the i-1th stand by considering the disturbance of the i-th and the i-th stand. [Reference numerals] (101) First stand; (101) Fourth stand; (102) Second stand; (103) Third stand; (106) First external section compensation unit; (108) Second external section compensation unit; (110) Third external section compensation unit |
