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Using fuzzy self-organising maps for safety critical systems

Kurd, Z. and Kelly, T.P. (2007) Using fuzzy self-organising maps for safety critical systems. Reliability Engineering and System Safety, 92 (11). pp. 1563-1583. ISSN 0951-8320

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Abstract

This paper defines a type of constrained artificial neural network (ANN) that enables analytical certification arguments whilst retaining valuable performance characteristics. Previous work has defined a safety lifecycle for ANNs without detailing a specific neural model. Building on this previous work, the underpinning of the devised model is based upon an existing neuro-fuzzy system called the fuzzy self-organising map (FSOM). The FSOM is type of 'hybrid' ANN which allows behaviour to be described qualitatively and quantitatively using meaningful expressions. Safety of the FSOM is argued through adherence to safety requirements-derived from hazard analysis and expressed using safety constraints. The approach enables the construction of compelling (product-based) arguments for mitigation of potential failure modes associated with the FSOM. The constrained FSOM has been termed a 'safety critical artificial neural network' (SCANN). The SCANN can be used for non-linear function approximation and allows certified learning and generalisation for high criticality roles. A discussion of benefits for real-world applications is also presented. (c) 2006 Elsevier Ltd. All rights reserved.

Item Type: Article
Institution: The University of York
Academic Units: The University of York > Computer Science (York)
Depositing User: York RAE Import
Date Deposited: 17 Feb 2009 08:42
Last Modified: 17 Feb 2009 08:42
Published Version: http://dx.doi.org/10.1016/j.ress.2006.http://dx.do...
Status: Published
Publisher: Elsevier Science B.V., Amsterdam.
Identification Number: 10.1016/j.ress.2006.10.005
URI: http://eprints.whiterose.ac.uk/id/eprint/7424

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