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Apparatus and method for controlling a process using a trained parallel distributed processing network

  • US 5,119,468 A
  • Filed: 02/27/1991
  • Issued: 06/02/1992
  • Est. Priority Date: 02/28/1989
  • Status: Expired due to Term
First Claim
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1. A control system for both batch initialization and for on-going control of a physical process, the process being of the type in which inputs having physical parameters P are used to produce a product having physical characteristics C associated therewith, the control system comprising:

  • a parallel distributed processing network previously trained to simulate the process, the parallel distributed processing network being responsive to input activations A to produce outputs Y, the activations being representative of the input parameters P of the process and the outputs being representative of the characteristics C of the product of the process;

    means for producing a set of goal signals G corresponding to the desired physical characteristics D of the product of the process;

    means for generating a signal representative of the error E between the goal signals G and the outputs Y of the network;

    means for determining the values of the updated inputs AU of the parallel distributed processing network that are needed to drive the error E to a predetermined minimum, andmeans for changing the actual physical input parameters P of the process to correspond to the updated inputs values AU producing the minimum error.

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