Abstract：Two flatness feedforward control methods for six high tandem cold rolling mill were studied in this paper. One is the global compensation method which uses work roll bending, and the other is the optimum compensation method that integrates work and intermediate roll bending to compensate the rolling force variation. The control results show that quadratic component of strip flatness which casused by rolling force variation can be eliminated by using the global compensation method, but little effect to quartic component. However, for the optimum compensation method quadratic and quartic components of strip flatness can be controlled effectively.
2009, Vol. 44 
