Development of Multivariable Gauge and Tension Control for Tandem Cold Mills Based on ILQ Design Theory

Abstract

This paper considers the gauge and tension control problem in tandem cold rolling. An optimal multivariable solution is proposed via the extended ILQ (Inverse Linear Quadratic) design theory. Analytical investigation provides to simplify and to generalize controller structure. Stability analysis confirms its robust stability under certain perturbation. Actual data of Kudamatsu's No.2 Tandem Cold Mill show good performance of the new control system.