KAGAKU KOGAKU RONBUNSHU
Online ISSN : 1349-9203
Print ISSN : 0386-216X
ISSN-L : 0386-216X
Fault Diagnosis Using Condition for Cause-Effect Relationship among State Variables
Kazuhiro TakedaYoshifumi TsugeHisayoshi Matsuyama
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1996 Volume 22 Issue 5 Pages 1009-1017

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Abstract

It is essential to quantitatively estimate the performance of fault diagnosis. In particular, two quantitative performance criteria are very important : diagnostic reliability and diagnostic accuracy. Each criteria is defined for the design phase and the running phase, respectively. This paper addresses diagnostic reliability for the running phase and diagnostic reliability and accuracy for the design phase.
A fault diagnostic method utilizing signed directed graph is proposed. In this paper, a modified fault diagnosis method which has higher diagnostic accuracy than the aforementioned method's diagnostic accuracy is proposed. The proposed method uses conditions for cause-effect relationship among state variables. Furthermore, the performance of the proposed method and criteria is demonstrated by use of mini-plant.

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© by THE SOCIETY OF CHEMICAL ENGINEERS, JAPAN
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