A new decoupling matrix method for paper basis weight profile control

The increasing demand for higher-quality paper requires cross-directional profile control of paper thickness, moisture, and basis weight. Inverse matrix decoupling was shown to be effective for paper thickness profile control, but did not give stable results for the basis weight profile. The actuator interaction matrix (rather than its inverse) was then tried as a weighting function, and good results were achieved. Results were even better when a double-size interaction matrix obtained by interpolation between actual values was used