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Distributed maintenance system based on causal networks

  • US 6,208,955 B1
  • Filed: 06/12/1998
  • Issued: 03/27/2001
  • Est. Priority Date: 06/12/1998
  • Status: Expired due to Term
First Claim
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1. In an avionics system having a plurality of interrelated sub-systems, a diagnostic system for diagnosing a failing sub-system, said diagnostic system comprising:

  • a communication network incorporating an object oriented communication paradigm for transmitting objects;

    a data collector, coupled to said sub-systems and to said communication network, for deriving state variables representative of the operation of said sub-systems;

    an evaluator, coupled to said communication network for receiving said state variables, having a set of query directed acyclic graph files associated therewith, said evaluator adapted to access said files to generate a diagnostic inference in response to erroneous operation of at least one of said sub-systems as represented by said state variables; and

    a presenter, coupled said communication network, for combining said inference from said evaluator with a schematic representation of said avionic system to graphically identify at least one sub-system causing said erroneous operation.

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