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A Structural Algorithm for Finding Testable Sub-models and Multiple Fault Isolability Analysis
Linköping University, Department of Electrical Engineering, Vehicular Systems. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Electrical Engineering, Vehicular Systems. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Electrical Engineering, Vehicular Systems. Linköping University, Faculty of Science & Engineering.
2010 (English)In: 21st Annual Workshop Proceedings, phm society , 2010Conference paper, Published paper (Refereed)
Abstract [en]

Structural methods have previously been used to perform isolability analysis and finding testable sub-models, so called Minimal Structurally Overdetermined (MSO) sets, Analytical Redundancy Relations (ARR), or Possible Conflicts (PC). The number of MSO sets grows exponentially in the degree of redundancy making the task of computing MSO sets intractable for systems with high degree of redundancy. This paper describes an efficient graph-theoretical algorithm for computing a similar, but smaller, set of testable submodels called Test Equation Supports (TES). A key difference, compared to an MSO based approach, is that the influence of faults is taken into account and the resulting number of testable models as well as the computational complexity of finding them can be reduced significantly without reducing the possible diagnosis performance. It is shown that the TESs in a direct way characterize the complete multiple fault isolability property of a model and thus extends previous structural approaches from the single-fault case.

Place, publisher, year, edition, pages
phm society , 2010.
Keyword [en]
Structural Methods, Diagnosis
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:liu:diva-138366ISBN: 978-1-936263-02-8 (electronic)OAI: oai:DiVA.org:liu-138366DiVA: diva2:1109457
Conference
21st International Workshop on Principles of Diagnosis (DX-10)
Available from: 2017-06-14 Created: 2017-06-14 Last updated: 2017-06-20

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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  • vancouver
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Language
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  • nn-NB
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Output format
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