This paper mainly describes a fault diagnosis scheme for aircraft multi branches wiring networks. The background theory is based\non the matching algorithm with theoretical reflection waveform and realistic reflection waveform. Firstly, a numerical model\nwith a comprehensive database was built to create the theoretical waveform of the measured wiring network. On the other hand,\nthe realistic reflection waveform of the measured wiring network can be collected by reflectometry detection system. Then, the\nwave form matching algorithm and fault diagnosis algorithm were applied to detect the fault type and fault location in the measured\nwiring network. With all the steps above, the fault diagnosis scheme was designed and realized. Finally, a multi branches wiring\nnetwork, which includes two branches, and one of its branches contains two sub branches with different types of faults, was built to\nverify the fault diagnosis scheme and the results show that the scheme is an effective way to diagnose faults in multi branches wiring\nnetwork
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