Patent ID: 8616033
Filing Date: 2013-12-31
Classification: B21B,G05D

Abstract:
1. A method for vibration damping and/or shape control of a suspended metal strip, the method comprising the steps of: measuring distance to said metal strip by a plurality of non-contact sensors, providing distance measurements, generating a deflection profile based on said distance measurements, decomposing said deflection profile into a number of base shapes, and controlling said deflection profile by a plurality of non-contact actuators, said step of controlling comprising providing for each of said base shapes a corresponding combination of force profiles, said step of controlling said deflection profile comprises optimizing said combinations of force profiles so as to provide in mean a maximally flat deflection of said metal strip; wherein at least two rows of said sensors are arranged at a first height and a second height of said metal strip and wherein the method comprises the further steps of: determining a first deflection profile at said first height and determining a second deflection profile at said second height, and performing shape control of said metal strip based on said first deflection profile and performing vibration control based on said second deflection profile.