METHOD AND CIRCUIT FOR PREDICTING AND REGULATING A PAPER WINDING PARAMETER IN A PAPER WINDING DEVICE

摘要

In order to achieve a constant thickness when winding a paper strip, which represents an essential qualitative parameter in the production process of paper, the linear force (L) or the tensile force of the paper strip are corrected as an influencing force. The relationship between force and the thickness of the ply is determined by conducting measurements and feeding said measurements to a regulator. Winding is generally carried out from the drum to the winding station in winding devices. The invention is based on the relationship between winding and unwinding with the purpose of measuring the difference in thickness of the ply and training a predictor (Pi) with said measured values. During operation, a detectable parameter is measured to regulate a paper winding device. Said measured values are used to determine changes in the thickness of the ply or any other correlated qualitative parameter. In order to compensate for the idle time arising as a result of measurements, the predictor is supplied with specific qualitative parameters and exactly predicts the parameters achieved after the idle time has expired so that measurement of the predicted values corresponds with the actual measured value. Said parameters serve to establish the difference in regulation and are fed to the regulator which then calculates the corrective force used to correct the actual set influencing force of the paper winding device. This makes it possible to achieve constant or desired preset winding processes in paper winding.