Qualitative Event-based Diagnosis with Possible Conflicts Applied to Spacecraft Power Distribution Systems

Shared by Miryam Strautkalns, updated on Jul 29, 2013


Author(s) :
M. Daigle, A. Bregon, I. Roychoudhury

Model-based diagnosis enables efficient and safe operation of engineered systems. In this paper, we describe two algorithms based on a qualitative event-based fault isolation framework augmented with model-based fault identification that are applied to spacecraft power distribution systems. Although based on a common framework, the fundamental difference between the two algorithms is that one uses a global model for residual generation, fault isolation, and fault identification; whereas the other uses a set of minimal submodels computed using Possible Conflicts. We describe the implementation of the two algorithms and compare their diagnosis results on a representative spacecraft power distribution system.

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