Title: The Improvement of Fault Diagnosis Algorithm Using Signed Directed Graph
Abstract: As a fault diagnosis method for a large-scale chemical plant, qualitative model-based method using signed directed graph has been proposed. This method has high diagnostic reliability (high probability of finding the real fault cause) but low diagnostic accuracy (poor information content obtained from diagnostic result). To overcome low diagnostic accuracy, the method is improved to use information about delays in fault propagation among state variables, representing the delays by fuzzy numbers. Furthermore, the diagnostic accuracy of the improved method is evaluated by introducing a concept of information content Finally, diagnostic experiments with the use of a mini-plant demonstrate that the improved method has higher diagnostic accuracy and the robustness for ambiguity contained in the delays.
Publication Year: 1994
Publication Date: 1994-06-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 9
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