Qft Parametric Robust Control Of The Looper System In A Hot Rolling Mill

In the present work, two single loop controllers are designed by Quantitative Feedback Theory control technique to keep stability and performance in the presence of parametric uncertainties in a hot rolling mill. The controllers are designed for the strip tension and looper angular position loops. Their performance is evaluated and compared against Proportional-Integral controllers as well as those that currently exist in most of the hot strip mills. Simulations are carried out by connecting the controllers as a diagonal control and tested in the 2 x 2 multivariable model of the lopper system, thus to assess the controllers' capabilities for reducing interactions as well.