Septavera Sharvia
Non-coherent modelling in compositional fault tree analysis
Sharvia, Septavera; Papadopoulos, Yiannis Ioannis
Abstract
The inclusion of NOT gates in a fault tree creates a 'non-coherent' structure in which not only the failure of a component but also the negation of failure, i.e. the working state of the component, can contribute to the undesirable effects on a system. This type of non-coherent modelling remains controversial; its usefulness is still debated among academics, which explains why NOT gates have not been included in the Fault Tree Handbook. In this paper, we review work on non-coherent fault trees and highlight circumstances where non-coherent modelling is appropriate and useful. We then describe an extension to HiP-HOPS (Hierarchically Performed Hazard Origin and Propagation Studies), a recently proposed compositional safety analysis method, that enables model-based synthesis and analysis of non-coherent fault trees. A small example is given to illustrate application of the extended method and demonstrate how this type of non-coherent modelling can give a more precise and ultimately more correct insight into failure behaviour. Copyright © 2007 International Federation of Automatic Control All Rights Reserved.
Citation
Sharvia, S., & Papadopoulos, Y. I. Non-coherent modelling in compositional fault tree analysis
Presentation Conference Type | Conference Paper (published) |
---|---|
Online Publication Date | Apr 25, 2016 |
Publication Date | Dec 1, 2008 |
Deposit Date | Jul 13, 2021 |
Journal | IFAC Proceedings Volumes (IFAC-PapersOnline) |
Print ISSN | 1474-6670 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 41 |
Issue | 2 |
Pages | 4138-4143 |
ISBN | 9783902661005 |
DOI | https://doi.org/10.3182/20080706-5-KR-1001.00696 |
Public URL | https://hull-repository.worktribe.com/output/3623388 |
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