Data processing: generic control systems or specific application – Specific application – apparatus or process – Product assembly or manufacturing
Reexamination Certificate
2006-05-08
2011-11-01
Barnes-Bullock, Crystal J (Department: 2122)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Product assembly or manufacturing
C700S155000, C072S009100, C072S009200, C072S011700, C072S011800
Reexamination Certificate
active
08050792
ABSTRACT:
A method and a device for optimization of flatness control in the rolling of a strip using any number of mill stands and actuators. A mill model is used represented by a mill matrix that includes information of the flatness effect of each actuator. Each actuator's flatness effect is translated into a coordinate system having a dimension less than or equal to the number of actuators used. The actual flatness values are monitoring/sampling across the strip. A vector of the flatness error/deviation is computed as the difference between the monitored/sampled strip flatness and a reference flatness vector. The flatness error is converted into a smaller parameterized flatness error vector. A dynamic controller is used to calculate optimized actuator set-points in order to minimize the parameterized flatness error, thereby achieving the desired strip flatness. Also a system for optimization of flatness control in rolling a strip.
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ABB AB
Barnes-Bullock Crystal J
Franklin Eric J.
Venable LLP
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