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Fault Analysis and Repair Strategies for Large Velocity Errors in Platform-Based Inertial Navigation Systems

Author(s)

Xuanyu Ye1,#, Fan Ye2,#, Guowei Chen1,*, Yujie Zeng1, Jin Pang1

Affiliation(s)

1Naval University of Engineering, Wuhan, Hubei, China 2Unit 92055, Shanghai, China *Corresponding Author #Xuanyu Ye and Fan Ye contributed equally to this study.

Abstract

To address a large velocity error fault that occurred in a certain type of platform-based inertial navigation system during ground calibration, fault tree analysis was adopted to carry out systematic troubleshooting. First, a fault tree with “large velocity error” as the top event was established, and the fault causes were sorted out according to the principle of “from the whole to the parts, decomposing level by level.” On this basis, referring to the system schematic diagram, the signal flow in the system control loops was analyzed in depth to identify the key nodes affecting velocity accuracy. Subsequently, possible fault causes were checked one by one according to the fault tree. By means of parameter testing, signal measurement, and component swapping, and following the principle of “easy before difficult and eliminating items one by one,” the fault scope was gradually narrowed. Finally, the fault was localized to the minimum replaceable unit, the fault point was confirmed and eliminated, and the system was restored to normal. This troubleshooting method is well-organized and highly targeted, greatly shortening the time for fault localization, and has certain reference value for the analysis and elimination of other similar faults in platform-based inertial navigation systems.

Keywords

Velocity Error; Fault Repair; Platform-Based Bnertial Navigation System; Gyroscope

References

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