The invention relates to a closed-loop regulating method for a metallurgical treatment carried out on a moving product (1), in which treatment the check measurement is obtained with a significant and variable delay in relation to the regulated treatment, in which method a digital regulator (14) having dynamic adjustment (RST sampled transfer- function) is used, characterized in that the sampling rate is continuously varied such that the abovementioned delay always remains equal to a predetermined integral number of sampling periods.
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