Rough control for hot rolled laminar cooling

Aim of laminar cooling is to make hot rolled strip from high finishing roll temperature to requested coiling temperature, it makes strip obtain satisfactory microstructure performance and mechanical property. On the view of modern control, laminar cooling control is an uncertain-information, large-lag, multi-variable, nonlinear and complex control problem. By the rough set theory, the decision-making table, which includes the diagnostic state and the corresponding control strategy of operator in the laminar cooling control of hot rolled, is reduced. And the rough control rules on the laminar cooling are get. The simulation shows the rules can apply on the laminar cooling control, and the application of the rough set can get fast the feedforward control number of water section in the laminar cooling.