Toward an Equation-Oriented Framework for Diagnosis of Complex Systems

Alexander Feldman
University College Cork, Ireland

Gregory Provan
University College Cork, Ireland

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Ingår i: Proceedings of the 5th International Workshop on Equation-Based Object-Oriented Modeling Languages and Tools; April 19; University of Nottingham; Nottingham; UK

Linköping Electronic Conference Proceedings 84:8, s. 65-74

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Publicerad: 2013-03-27

ISBN: 978-91-7519-621-3 (print)

ISSN: 1650-3686 (tryckt), 1650-3740 (online)


Diagnosis of complex systems is a critical area for most real-world systems. Given the wide range of system types; including physical systems; logic circuits; state-machines; control systems; and software; there is no commonlyaccepted modeling language or inference algorithms for model-Based Diagnosis (MBD) of such systems. Designing a language that can be used for modeling such a wide class of systems; while being able to efficiently solve the model; is a formidable task. The computational efficiency with which a given model can be solved; although often neglected by designers of modeling languages; is a key to parameter identification and answering MBD challenges. We address this freedom-of-modeling versus model-solving efficiency trade-off challenge by evolving a language for MBD of physical system; called LYDIA. In this paper we report on the abilities of LYDIA to model a class of physical systems; the algorithms that we use for solving MBD problems and the results that we have obtained for several challenging systems.


model-based diagnosis; model-based testing; automated reasoning; modeling language


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