Abstract
Possible Conflicts (PCs) are those minimally redundant subsystems, computed offline, that can be used for consistency-based diagnosis of physical systems. In this work we characterize Possible Conflicts for hybrid systems diagnosis in the Hybrid Bond Graph modelling framework, introducing the notion of HBG-PCs. We provide a method to compute the complete set of HBG-PCs before causality is assigned in the model, removing a previous assumption that the system model should have a valid causal assignment when every switching junction was set to on. We call this new concept Structural HBG-PC. We illustrate these issues with an prototypical example and discuss our contributions against other proposals in the literature.
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Notes
- 1.
The Artificial Intelligence approach to model-based diagnosis it is usually knwon as DX, while the Control Theory approach to the same problem is usually known as FDI.
- 2.
Exceptionally some degenerated subsystems can appear, but they had no interest for diagnosis purposes.
- 3.
Otherwise there would be parts of the system that will be never used, or there is no need for such sw in the model.
- 4.
It is straightforward propagating from sensor/sources an traversing non-parametric junctions.
- 5.
http://www.infor.uva.es/~belar/HBGPCS_results/results.pdf has a complete description of the systems and the results.
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Acknowledgments
This work has been supported by Spanish MINECO under DPI2013-45414-R grant.
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Pulido, B., Alonso-González, C., Bregon, A., Hernández, A. (2015). Characterizing and Computing HBG-PCs for Hybrid Systems Fault Diagnosis. In: Puerta, J., et al. Advances in Artificial Intelligence. CAEPIA 2015. Lecture Notes in Computer Science(), vol 9422. Springer, Cham. https://doi.org/10.1007/978-3-319-24598-0_11
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DOI: https://doi.org/10.1007/978-3-319-24598-0_11
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