Modeling and control of the property variation of a two-dimensional web

摘要

A method for determining a two-dimensional variation of a material web, while these web of material is made, wherein the method comprising the steps of:Measuring at least one property of the web in the substantially transversely over the entire width of the web, in order to produce a two-dimensional measuring function,Selecting a number of elementary basic functions, andFolding of the two-dimensional measurement function with the elementary basic function, in order to produce a two-dimensional variation signal, which is representative for the material web.