Method for tension control
AssigneeSMS group GmbH
InventorsJörn SIEGHART, Ronny PETERS
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Abstract
A method for tension control in a band-shaped material between two tension points, in particular between two adjacent roll stands, wherein at least one of the tension points has a rotary drive as an actuator. In order to make known tension controls of this type more effective and faster the controller output signal is varied in connection with the conversion thereof into the actuating signal for the rotary drive, at least temporarily, in dependence on a variable representing the band-shaped material.
Claims23
1-21. (canceled)
A method for tension control in a band-shaped material between two clamping points, wherein at least one of the clamping points has a rotary drive, the method comprising the steps of:
- determining actual tension between the two clamping points;
- determining a control error e(t) as a difference between the actual tension and a given desired tension;
- entering the control error e(t) on a controller to generate a controller output signal R(t);
- converting the controller output signal R(t) into an actuating signal S(t);
- regulating the actual tension to the desired tension by varying speed of the rotary drive as the actuating element in accordance with the actuating signal S(t);
- and varying the controller output signal R(t) in connection with the conversion into the actuating signal S(t) at least temporarily in dependence on a variable g(t) representing speed of the band-shaped material.
The method according to claim 31, wherein
- in the case of formula 2:
- gmin1<gmaxi<gmax1;
- (5)
- or
- in the case of formula 3:
- gmin2<gmaxi<gmax2 (6)
Dependencies are inferred from the claim text.