The paper describes recent progress in two-dimensional estimation and control methods for web forming processes such as paper making. In particular, it outlines some of the developments in two-dimensional methods that have taken place in the Control Systems Centre since the Control '92 Conference  and relates them to recent sensor research. The basic premise for this paper is that continuous web forming (such as takes place at the wet-end of a paper machine) or related coating processes are two-dimensional dynamical processes in which the machine direction (MD) and cross direction (CD) form the two dimensions. The two-dimensional paradigm leads to a set of techniques with which to estimate, predict and potentially regulate the MD/CD process in a way which acknowledges and accounts for the mutual dependence of the machine and cross machine directions.
|Number of pages||4|
|Journal||Pulp and Paper Canada|
|Publication status||Published - Sept 1997|
- Cross direction
- Machine direction
- Process control