Application of multivariable GMV cross directional control to a paper machine

This paper considers suitable disturbance models for use in web forming processes, it suggests a practical disturbance representation and using spectral factorisation presents a multivariable aggregated model. The paper compares Generalised Minimum Variance (GMV) controllers designed using uncorrelated and correlated disturbances. It demonstrates the improvement in performance of a multivariable GMV controller which is designed to accomodate the cross direction correlation in the disturbance, when compared with a scalar GMV controller which cannot take into account the effects of correlated disturbances.