Method of suppressing the influence of roll eccentricity on the adjustment of the thickness of rolling stock in a roll stand

摘要

The suppression of the influence of roll eccentricities ( DELTA R) on control of the thickness (ha) of the rolled material in a rolling mill stand, with the width (x) of a dead zone - in which control is insensitive to signal fluctuations caused by roll eccentricities - varied dependent on the magnitude of signal fluctuations. The signal fluctuations used for adjustment of the zone width (x) are filtered by means of a bandpass filter (26) whose middle frequency corresponds to the principal oscillation ( omega ) of roll eccentricities ( DELTA R).