| 摘要 |
<p>PURPOSE:To obtain fixed plate thickness controlling effect and to make the device very useful by estimating mill constant and plasticity coefficient of a steel plate during rolling and thereby changing gain of a screw down controlling system. CONSTITUTION:An automatic gain adjuster 10 calculates plasticity coefficient of steel plate Q, and mill constant M from input, entrance side plate thickness deviation DELTAH, exit side plate thickness deviation DELTAn, rolling load deviation DELTAP and roll gap deviation DELTAS and corrects alpha/m of mill constant M, and corrects gain of transfer function H1(S) of plasticity coefficient (q) of steel plate. Formerly, it was not possible to obtain sufficient plate thickness controlling function when the mill constant M and plasticity coefficient of steel plate Q fluctuate. However, this problem is eliminated by this way. Accordingly, the control gain of the plate thickness controlling device can be maintained at optimum operating condition at all times.</p> |
