Many models for fault detection and isolation (FDI) will contain multi-port energy storage and flow-dependencies due to convection. Converting these models into qualitative ones leads to ambiguities that can be eliminated by analysis of boundary conditions. In this study the example of an automotive cooling system is used to demonstrate how these issues can be handled. Furthermore, time constants in the models need to correspond to the bandwidth of the data acquisition system. In order to achieve this, parameters leading to irrelevant time constants can be eliminated by assigning relatively small and large parameters to be zero or infinite respectively. However, this may result in (i) discontinuities and (ii) zero order causal paths ("algebraic loops"). Compensation of qualitative effects instead of reversal is shown to be an adequate solution for these problems.
|Title of host publication||Proceedings of the 2001 International Conference on Bond Graph Modeling and Simulation (ICBGM '01)|
|Subtitle of host publication||Phoenix, Arizona, Crowne Plaza Hotel, January 7-11, 2001|
|Editors||José J. Granda, Geneviève Dauphin-Tanguy|
|Place of Publication||San Diego, CA|
|Publisher||The Society for Computer Simulation International|
|Number of pages||6|
|Publication status||Published - 7 Jan 2001|
|Event||International Conference on Bond Graph Modeling and Simulation, ICBGM 2001 - Phoenix, United States|
Duration: 7 Jan 2001 → 11 Jan 2001
|Conference||International Conference on Bond Graph Modeling and Simulation, ICBGM 2001|
|Period||7/01/01 → 11/01/01|
Feenstra, P. J., Mosterman, P. J., Biswas, G., & Breedveld, P. C. (2001). Bond Graph Modeling Procedures for Fault Detection and Isolation of Complex Flow Processes. In J. J. Granda, & G. Dauphin-Tanguy (Eds.), Proceedings of the 2001 International Conference on Bond Graph Modeling and Simulation (ICBGM '01): Phoenix, Arizona, Crowne Plaza Hotel, January 7-11, 2001 (pp. 77-82). San Diego, CA: The Society for Computer Simulation International.