Easily tuned and robust control algorithm for single or multiple variable systems
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United States of America Patent
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Jun 9, 2009
Grant Date -
Jul 3, 2008
app pub date -
Jan 2, 2007
filing date -
Jan 2, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A controller and associated methods. A controller has an input for a controlled variable; a proportional term; an integral term; and a predictive term. The predictive term has an error-predictive subterm including at least a past value of an error; and a command-predictive subterm including at least one past value of a control command value; and an output. The controller can apply the predictive term and at least one of the proportional term and integral term to generate a command for the output. A method for controlling a process variable is also provided including applying a predictive term having an error-predictive subterm that includes at least a past value of an error and a command-predictive subterm that has at least a past value of a control command. The method further includes the step of generating a command based on the results of the applying the terms.
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