Two-dimensional control systems: application to the CD and MD control problem

Abstract

The paper outlines a new approach to cross-direction (CD) and machine-direction (MD) control. The basic idea is to consider the wet-end process as a two-dimensional (2D) dynamical system in which the CD and MD are two mutually dependent dynamical processes. The elements of a new control theory for such 2-D processes are presented together with discussion of possible applications to the CD/MD regulation problem.