Control of hot-rolling strip for Wavelet-based system identification approach

In this paper, a new scheme for Wavelet-based Force Feed-Forward Automatic Gauge Control (WFFF-AGC) based on multi-resolution decomposition using wavelets is proposed to improve the conventional Automatic Gauge Control (AGC). Multi-resolution provides a variable resolution time-frequency distribution for the roll force of F1-F6 stand, then signals containing hardness information are converted into control decisions used for feed-forward control in latter stands. By doing so, the thickness error especially at the head-end part of the strip is considerably reduced.