Control of the tandem hot strip mill under expanded uncertainties and disturbances

Previously it has been shown that a controller based on the use of the state-dependent Riccati equation (SDRE) technique has resulted in significant improvements in performance. In our previous work controller performance under certain disturbances and uncertainties that are considered typical for tandem hot rolling was addressed. While the performance under these conditions was quite successful, performance under an expanded set of conditions remained to be evaluated. In this paper we examine performance under such a set of disturbances and uncertainties and show that the improvement in controller performance is retained under these expanded operational aspects. This improves the confidence in the performance of the previously developed controller under these conditions.