| 摘要 |
<p>The invention concerns a method for regulation of a roll adjustable in zones, which roll (10) adjustable in zones forms a nip (N) with a backup roll (20). A paper or board web (W) is passed through the nip (N) in view of controlling the cross-direction profile of the web (W), and the nip (N) is loaded adjustably by means of hydraulic glide shoes (13) which form the zones in the roll (10) adjustable in zones. In the method, the cross-direction profile of the web (W) is measured constantly after the nip (N), and a differential profile between the measured cross-direction profile and the target cross-direction profile is computed, which differential profile is used as a regulation parameter in a closed regulation circuit so as to regulate the nip profile to the desired form. In the method in accordance with the invention, a regulation model is used in which substantially all the forces applied to the roll mantle (12) are formed as models each of them separately so that these forces are also treated each of them separately in the regulation process.</p> |
