| 摘要 |
<p>PROBLEM TO BE SOLVED: To make a temp. (intermediate temp.) in the middle of a run out table and a temp. (final temp.) at the terminal hit the target value with high accuracy over the entire area of a hot rolled steel sheet and to obtain a high hit rate even when the transportation speed is higher. SOLUTION: Using the actual intermediate temp. TI(n) , actual final temp. TE(n) of the steel sheet 1 measured with intermediate and final temp. sensors 6I, 6E and the aimed intermediate temp. TIaim and aimed final temp. TEaim which are preset, an aimed intermediate temp. TIaim(n) =TIaim +ΔTI(n-1) +α(TIaim --TI(n) ) and an aimed final temp. TIaim(n) =TEaim +ΔTE(n-1) +α(TEaim +TE(n) ) are calculated in every control cycle (n) with a controller 5. Where,ΔTI(n-1) andΔTE(n-1) are the deviation of the intermediate temp. and the deviation of the final temp. in a control cycle (n-1) andαis a coefficient such as 0.5. The amount of water injection in each cooling zone of coolers 4a, 4b, is controlled using the obtained target intermediate temp. and target final temp. in place of the aimed intermediate temp. and the aimed final temp. with the controller.</p> |
