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Approche à base de logique floue pour le test et le diagnostic des circuits analogiques

Abstract : Analog circuits and systems are more and more used in the frame of novel applications. Also, they become more complex, which creates the necessity to dispose of automatic methods for their test and diagnosis which represents a crucial problem in this domain. Although the test and the diagnosis of digital circuits has been successfully developed to the point that it can be automated, its development for analog circuits (AC) is still in its first steps. There are two principle reasons for this situation. One is that there has been no pressing need from the industry. The other reason is the very complex electric nature of AC. This thesis, which is situated in this context, has as objective the development of a novel approach for the test and the diagnosis of analog and mixed circuits. The issues of artificial intelligence have not been widely explored in this domain. But, their application to the test and the diagnosis of other analog devices and systems have given a promising results. We have studied the different possible approaches, specially the following ones~: model-based reasoning, qualitative reasoning and fuzzy logic based approach. The result of this study is is a development of a novel approach using fuzzy logic and its techniques. Other approaches are not excluded. This novel approach has been implemented in a system named FLAMES. FLAMES, which is built to achieve the diagnosis of AC, has brought many enhancements to the state of the art specially in defining the tolerances as fuzzy intervals. It is also able to realize the simulation and to choose the best test point when the diagnosis is ambiguous. This last possibility is realized by a semi-qualitative approach which considers a purely qualitative step and a quantitative step based on fuzzy logic. It is also possible to develop this approach for the diagnosis of mixed systems since it is equally applicable to digital circuits. Finally, obtained experimental results validate the approach developed and implemented.
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Submitted on : Wednesday, October 26, 2005 - 8:23:58 AM
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  • HAL Id : tel-00010761, version 1

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F. Mohamed. Approche à base de logique floue pour le test et le diagnostic des circuits analogiques. Micro et nanotechnologies/Microélectronique. Institut National Polytechnique de Grenoble - INPG, 1997. Français. ⟨tel-00010761⟩

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