Method and apparatus for approximating gains in dynamic and steady-state processes for prediction, control, and optimization
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United States of America Patent
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Aug 26, 2008
Grant Date -
Oct 26, 2006
app pub date -
Feb 21, 2006
filing date -
May 6, 1996
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Abstract
A method and apparatus for controlling a non-linear mill. A linear controller is provided having a linear gain k that is operable to receive inputs representing measured variables of the plant and predict on an output of the linear controller predicted control values for manipulatible variables that control the plant. A non-linear model of the plant is provided for storing a representation of the plant over a trained region of the operating input space and having a steady-state gain K associated therewith. The gain k of the linear model is adjusted with the gain K of the non-linear model in accordance with a predetermined relationship as the measured variables change the operating region of the input space at which the linear controller is predicting the values for the manipulatible variables. The predicted manipulatible variables are then output after the step of adjusting the gain k.
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