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Industrial expert system

  • US 5,293,585 A
  • Filed: 09/17/1992
  • Issued: 03/08/1994
  • Est. Priority Date: 08/31/1989
  • Status: Expired due to Fees
First Claim
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1. An industrial expert system for use in designing a plant system or constituent devices thereof and in fault detection, said industrial expert system comprising:

  • a knowledge base including i) a rules-section for describing rules for deductive inference, ii) an expression-section for describing calculation formulas, each of said formulas having a single variable value to be determined on one side of an equation, the other side being expressed in the form of a polynomial including known functions, and iii) an attributes-section for declaring the nature and value of each attribute cited in a deductive inference and a calculation thereof, and for declaring parameters for controlling communication between a process of carrying out said deductive inference and a process of carrying out said calculation according to a calculation formula; and

    a deductive inference engine for executing a deductive inference, said inference engine including i) chaining means for processing said rules for deductive inference as well as a collection of the calculation formulas related to said rules stored in said knowledge base and for performing forward/backward inference chaining on the calculation formulas, and ii) means for searching said calculation formulas in order to enable use of calculation results in a conditional part of a rule for deductive inference.

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