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Qualitative Modelling of Linear Networks in Engineering Applications

Mark H. Lee

There is a real need for electrical circuit modelling and analysis tools at an intermediate level between analogue and state-based simulators. Numerical tools do not capture the abstractions valued by engineers and logical/functional models do not maintain sufficient affinities with the electrical properties in a system. Qualitative models have had some notable successes in filling this gap but a number of difficulties pose a barrier to further progress. We describe current issues and some key problems in qualitative analysis of steady-state systems. We then present a new qualitative circuit analysis method based on a many-valued resistance quantity space with an orders-of-magnitude relation. The results of this technique are shown to solve key problem cases. We argue that the new scheme opens up considerably more modelling possibilities and the method can be tailored to the application domain, giving powerful modelling options.

Keywords: Qualitative Reasoning, Model-Based Reasoning

Citation: Mark H. Lee: Qualitative Modelling of Linear Networks in Engineering Applications. In W.Horn (ed.): ECAI2000, Proceedings of the 14th European Conference on Artificial Intelligence, IOS Press, Amsterdam, 2000, pp.161-165.

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ECAI-2000 is organised by the European Coordinating Committee for Artificial Intelligence (ECCAI) and hosted by the Humboldt University on behalf of Gesellschaft für Informatik.