| 摘要 |
<p>PURPOSE: To provide a rolling mill control method that suppresses sudden change in command when changing control parameter and that safely controls a rolling mill while a high responsiveness is maintained. CONSTITUTION: The parameter Fx , Fe , FR, Fd of each control mechanism is corrected by a control parameter correcting mechanism 41, with a change in the operating point. The state quantum x is subtracted from the previous value by a differential mechanism 51-1, the state quantum differential value was multiplied by the coefficient Fx by a state feedback mechanism 52, and a deviation value is determined for the manipulated variable of a screw-down component and a velocity component. This deviation value is integrated to the previous manipulated variable by an integrating mechanism 53 and outputted to a screw- down device and a roll driving device of a rolling mill 1. A prediction value is given for a few steps ahead (future) from the controlled point of time, by a command generating mechanism 42 and an entering plate thickness detector. A differential value is determined between the prediction value and the previous value for each of these steps, multiplying it by the coefficient of a feed forward mechanism 57 or 58, and obtaining the deviation value of a manipulated variable by each component with consideration given to plural steps ahead.</p> |
