método e aparelho para supressão de oscilações em uma instalação de laminação

摘要

A method and an apparatus for suppression of oscillations in a rolling installation is described. By means of a hydraulic roller engagement third-octave oscillations are effectively suppressed, thus making it possible to improve the quality of the rolled material and/or the productivity of the rolling installation. A manipulated variable is supplied to an electrohydraulic actuating element that acts on at least one hydraulic actuator for the roller engagement and has a rated flow rate of ≧50 l/min. At least a portion of the frequency response at frequencies f≧80 Hz has a magnitude drop of ≦̸3 dB, and the phase lag &phgr; in this frequency range satisfies the conditions f≧19·{square root over (&phgr;)}+3.1·10−6·&phgr;4 and &phgr;<90°.