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Predictive control method and apparatus

  • US 5,428,559 A
  • Filed: 08/13/1992
  • Issued: 06/27/1995
  • Est. Priority Date: 08/14/1991
  • Status: Expired due to Term
First Claim
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1. A predictive control method for controlling a physical object, the physical object being responsive to a manipulated variable signal Un and producing a controlled variable signal Xn, comprising the steps of:

  • (1) preparing a multi-layered neural network as an identification model for said physical object;

    (2) receiving, at said multi-layered neural network, said controlled variable signal Xn and said manipulated variable signal Un, at a sampling time, and predicting a predicted value Zn+1 for said controlled variable signal Xn using said multi-layered neural network;

    (3) computing an error signal Δ

    Xn+1 between said predicted value Zn+1 and a desired value dn+1 for said controlled variable signal Xn ;

    (4) receiving said error signal Δ

    Xn+1 at said multi-layered neural network, finding a correction amount Δ

    Un for said manipulated variable signal Un using back propagation within said multi-layered neural network, and correcting said manipulated variable signal Un according to said correction amount Δ

    Un;

    and(5) transmitting said corrected manipulated variable signal to said physical object and controlling said physical object according to said corrected manipulated variable signal.

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