Method of flatness control in the rolling of a band and corresponding control system

摘要

Method for flatness control when rolling a strip (7) in a rolling mill (2) comprising unapluralidad roller (9-1, 9-2) controlled by actuators (A), the method comprising: a) receiving (S1) measurement data flatness (Y) relating to a flatness of the strip (7), b) determining (S2) an error of planarity (e) as a difference between a flatness reference (r) of the band ( 7) and the measured data of flatness (Y), wherein the method further comprises c) determining (S3) an error adjusted flatness (ep) based on the flatness error (e) and paralas weights combinations of positions actuators which provide a flatness effect below a valorumbral d) use (S4) the adjusted flatness error (ep) for controlling the actuators (a) to thereby control laplaneidad band (7).