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Dynamic on-line optimization of production processes

  • US 7,085,615 B2
  • Filed: 06/12/2003
  • Issued: 08/01/2006
  • Est. Priority Date: 06/12/2002
  • Status: Active Grant
First Claim
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1. A method for a production process having a number of process sections the method comprising:

  • obtaining a dynamic process model having time dependent relations between manipulated variables for said process sections and process output variables from respective process section;

    providing external constraints for said production process for a prediction time interval;

    measuring a set of process output variables of said production process;

    estimating an initial state by using said measured process output variables;

    defining an objective function involving predicted controlled process output variables for said prediction time interval and said external constraints;

    said predicted controlled process output variables being defined by said dynamic process model based on said initial state;

    optimizing said objective function under constraints imposed by said dynamic process model and/or said external constraints, by adapting said manipulated variables, giving input trajectories for said manipulated variables for said prediction time interval; and

    operating said production process by setting said manipulated variables according to said input trajectories during a control time interval.

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