A ROBUST WIDTH CONTROL DESIGN FOR HOT STRIP MILLS: AN LPV SYSTEM APPROACH WITH TIME VARIABLE TRANSFORMATION

摘要

A robust width control for hot strip mill systems in a steel industry is designed based on LPV system theory. Taking account of varying equilibrium point, parameter uncertainties, and a varying time delay, the design problem is formulated as a robust control problem for an LPV system, where the number of rotation of the exit roller is taken as "time." The effectiveness of the design is shown by numerical simulation.