Study for multiple fault diagnosis technology for spacecrafts based on multi-signal model
Song Zheng-ji · Journal of Astronautics · 2004
The optimal multiple fault diagnosis problem is NP-complete. The multisignal model for complex spacecrafts system such as satellite power was presented which uses diagram to subscribe the causal dependency relationship between components and tests. Consideration for priori probability of the components failure of system and available test set, based on Lagrange relaxation and subgradient optimization, a heuristic algorithm to find the most likely multiple fault set was given. The modeling method and diagnosis algorithm was validated in one test for a certain satellite power system. The results show that the mode is easy to build and the reasoning process is very fast which are suitable to be applied in multiple fault diagnosis for spacecrafts.