Crown feedback control strategy in hot tandem rolling

It is still a problem to choose a crown feedback control strategy. In combination with Jigang 1700 ASP control project, a method of calculating the adjustable range of crown at each stand exit was studied in theory. By using the method the choice of a crown feedback control strategy was realized, the strategy that all stands take part in control was gained and a formula of crown deviation distribution was deduced. On the basis of the formula, a crown feedback control model for hot tandem rolling was built, and it was on-line programmed, debugged and put into use. Up to now, the crown feedback control system has already run stably for about two months. Statistical results show that the crown control precision is improved with this crown feedback control system.