Micro adjustment AGC of last stand in hot finishing mill based on KPLS and TD
基于KPLS和TD的热连轧精轧末架微调AGC

Conventional thickness control of hot rolling mainly depends on the monitoring automatic gauge control (AGC) of downstream stands to reduce thickness deviation. This method brings excessive adjustment on the last stand, and has passive effects on profile. In order to alleviate this influence, micro adjustment AGC of last stand in hot finishing mill based on kernel partial least squares (KPLS) and tracking differentiator (TD) is proposed in this paper. It established relations between F5 and F6 stands' process variables through nonlinear feature extraction from rolling information of previous strip. Accordingly, the thickness precision can be reached by regulating the gap of F5 while keeping the F6 gap and force basically constant. Field experiment also proves this idea.