Method and system for vibration damping and shape control of a suspended metal strip
AssigneeABB Research Ltd.
InventorsMats Molander, Robert Stal, Peter Rybing
Life of this patent
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Abstract
A method for vibration damping and shape control of a suspended metal strip is provided. The method includes the steps of: measuring distance to the metal strip by a plurality of non-contact sensors, providing distance measurements; generating a deflection profile based on the distance measurements; decomposing the deflection profile to a number of base shapes; and controlling the deflection profile by a plurality of non-contact actuators. The step of controlling includes providing for each of the base shapes a corresponding combination of force profiles.
Claims13
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.
A system for vibration damping and/or shape control of a suspended metal strip, the system comprising:
- a plurality of non-contact sensors measuring distance to said metal strip thereby providing distance measurements, said sensors are arranged in at least two rows at a first height and a second height of said metal strip,
- means for generating a deflection profile based on said distance measurements,
- means for decomposing said deflection profile to a number of base shapes,
- a plurality of non-contact actuators,
- means for determining the contribution from each base shape to the deflection profile, and
- means for controlling said deflection profile by said plurality of non-contact actuators, said controlling comprising providing for each base shape a corresponding combination of force profiles, said combination comprising at least two force profiles,
- said means for 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.
Dependencies are inferred from the claim text.