A Model-Based Diagnosis System for Identifying Faulty Components in Digital Circuits

  • Authors:
  • Benjamin Han;Shie-Jue Lee;Hsin-Tai Yang

  • Affiliations:
  • Department of Electrical Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan;Department of Electrical Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan. leesj@ee.nsysu.edu.tw;Department of Electrical Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan

  • Venue:
  • Applied Intelligence
  • Year:
  • 1999

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Abstract

We describe the ideas and implementation of a model-based diagnosis system for digital circuits. Our work is based on Reiter‘s theory of diagnosis from first principles [14], incorporated with Hou‘s theory of measurements [17], to derivepossible diagnoses in a fault diagnosis task. To determine the best order in which measurements are to be taken, a measurement selection strategy using the genetic algorithm (MSSGA) is proposed. A circuit description language for describing circuits hierarchically is given. An efficient propositional logic prover used for consistency checking based on the trie structure is developed [22].An example run is given to illustrate the working ofthe system. Finally, a comparison with other systems is discussed,and possible extensions to our system are described.