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Computer method and apparatus for optimized controller in a non-linear process

  • US 6,654,649 B2
  • Filed: 12/05/2000
  • Issued: 11/25/2003
  • Est. Priority Date: 12/22/1999
  • Status: Expired due to Term
First Claim
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1. Computer apparatus for controlling a non-linear manufacturing process comprising:

  • a controller for determining and adjusting manipulated variable values for controlling a subject non-linear manufacturing process, the controller employing a linear model for modeling effect that would result in the subject manufacturing process with a step change in manipulated variable values; and

    an optimizer coupled to the controller for updating the linear model of the controller, as the subject non-linear manufacturing process transitions from one operating point to another, in a high degree of non-linearity between manipulated variables and controlled variables of the subject process, the controlled variables being indicative of physical properties of the subject process, the optimizer utilizing a non-linear model of the subject process for updating the linear model and determining target values of the controlled variables.

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