Improving Algorithms for Automatic Gauge-Control System of Plate Mill in Profiled Rolling Mode

Abstract

The authors developed and studied an automated gauge-control system for a plate mill in the profiled rolling mode featuring bias control by making the reference input based on the gauge setting derivate. The latter is connected to the screwdown mechanism positioning the regulator input. The key peculiarity of the developed control system is the inclusion of the positive feedback on gauge setting to the hydraulic screwdown mechanism positioning the regulator input, which leads to the increased system response speed and reduced gauge-control errors, including those occurring in the dynamic profiled rolling mode. The authors present a simulation for the “electric mill stand drive - hydraulic screwdown mechanism drive” system implemented in the Simulink environment of the MATLAB package. The research is based on the mathematical simulation method. This article presents the results of the experiments with the developed engineering solutions, as well as their application at the active production facility, the 5000 mill of Magnitogorsk Iron and Steel Works, Magnitogorsk, Russia.