| 摘要 |
<p>PURPOSE:To enable meandering control to disturbance such as the wedge of a steel sheet and rigidity difference between the right and left of a rolling mill by calculating control input so as to suppress the meandering in steel sheet rolling. CONSTITUTION:The meandering amount disturbance ys-dis to be added to a sensor meandering amount ys is taken as dicturbance input (w), meandering detecting amount ys-sensor, the leveling correcting amount DELTASdf-ref and sensor meandering amount ys as a a controlled variable (z), the leveling correcting amount DELTASdf-ref as a control input (u), meandering detecting amount ys-sensor as an observed amount (y) and the meandering amount yc, inlet sheet inclination yc' and leveling amount DELTASdf as a state (x). A transfer function K(s) by which the max. singular point of a state equation and a transfer function Gzw of a controller from the disturbance (w) to the controlled variable (z) is minimized is defined based on H infinity control theory and this transfer function K(s) is set to a controller. Next, a leveling correcting amount is calculated and the leveling amount is corrected by that amount. In this way, meandering control is enabled to the disturbance such as the wedge of the steel sheet and the rigidity difference between the right and left of the rolling mill.</p> |
