FEEDFORWARD THICKNESS CONTROLLER FOR ROLLING MILL AND METHOD FOR CONTROLLING IT

摘要

PROBLEM TO BE SOLVED: To provide a feedforward thickness controller and its control method by which offset equivalent to lock-on thickness deviation is prevented from appearing in the thickness deviation on the outlet side even in the nose part of a material to be rolled where the effect of the feedback thickness control just after starting the thickness control is not expectable.;SOLUTION: This controller is provided with a ramp function generating means 31 and an input correcting means 32. The input correcting means 32 outputs the output data of the ramp function generating means 31 to the feedforward thickness controlling means 33 from the start of thickness control until the output data of the ramp function generating means 31 becomes equal to the thickness deviation on the inlet side, and the thickness deviation on the inlet side is outputted thereafter. The feedforward thickness controlling means 33 controls a speed controlling means 7 and/or a screw-down location controlling means 8 by taking the output of the input correcting means 31 as the input.;COPYRIGHT: (C)2005,JPO&NCIPI