Abstract:

The complex system always contains several subsystems, and sometimes its structure is hierarchical. According to this situation, the test model of hierarchical systems is researched. Based on the exchange of the model, the Rollout algorithm is used to calculate the fault-test relation matrix model of each subsystem, and the diagnostic trees are set up according to the test sequence and the hierarchical structure. Then a new diagnosis strategy for the hierarchical system is proposed. The example demonstrates that the fault can be isolated to any floor if needed based on the strategy for the hierarchical system. Also this strategy can minimize the size of the fault-test relation matrix model and reduce calculation time.