Improvement of the Accuracy of a Fault Diagnosis System Ultilizing the Signed Directed Graph

Fumihiko Gujima, Bohyoh Shibata, Yoshifumi Tsuge, Hisayoshi Matsuyama, Junichi Shiozaki, Eiji O'Shima

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The algorithm for fault diagnosis by use of the signed directed graph has been improved so as to obtain diagnostic results of satisfactory accuracy. The improved algorithm requires both information about delays among state variables in a chemical process that are related to the manner of propagation of a failure, and information about dynamic characteristics of measured variables to be practically observed in the process. The usefulness of this algorithm is demonstrated by its application to a pilot plant.

Original languageEnglish
Pages (from-to)899-906
Number of pages8
Journalkagaku kogaku ronbunshu
Issue number5
Publication statusPublished - 1990

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering

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