Comparison and Simulation of Two Schemes for System-Level Fault Diagnosis Based on Federated Filtering
WU Xunzhong · Electronics Optics & Control · 2009
Base on the characteristics of federated filtering structure,comparison and analysis are made between two schemes for system-level fault diagnosis in the SINS/GPS/ADS/TANCAN/RADAR integrated navigation.The two schemes are: 1) a two-stage fault detection technique based on measurement consistent and the Chi-square test;and 2) a dual-state recursive fault detection method.Simulation is made through faults setting.The result showed that the fault detection approaches are effective to improve the fault-tolerance and reliability of integrated navigation system.The two schemes can detect hard and soft faults effectively with high detection sensitivity.But both of them have some false or missed detections,the two-stage fault detection technique is better than the other one.