Improved linear model of hot strip mill for tail crash control

This paper proposes a modified linear model for the snake motion in the hot strip rolling, and the tail crash control based on the model is considered. First, an improved linear model for the snake motion is provided by introducing some parameters to conventional equations. Next, the state-space model is derived from the obtained linear model, and the state feedback control system is designed. The dynamic simulation based on the rapid version of the generalized 2-dimensional theory is used for adjusting parameters and for checking behaviours of the control system, instead of the experiment using an actual plant. The effectiveness of the proposed method is demonstrated by numerical experiments of the hot strip rolling by a six-high mill.