Research on integrity fault monitoring performance based on GLS
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摘要: 卫星着陆系统(GLS)作为先进的航空新技术，其主要功能是为终端区精密进近的机载设备提供信号修正增强服务，为实现整个系统高精度离场和精密进近的功能发挥着重要作用. GLS完好性是终端区进近着陆引导应用的重要参数，是可靠性的重要依据，然而目前普通用户只关注导航定位的精度而没有考虑定位结果的可靠性，航空导航领域的机载对定位结果的可靠性要求极高，因此针对完好性故障监测性能展开研究分析，提出了一种接收机钟差调整策略并对其有效性进行仿真验证，并验证了完好性故障排除及未排除两种情况对定位精度及完好性的影响，进而证明完好性故障监测可保障GLS的系统性能、运行能力和安全性能达到预期要求.
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关键词:
- 卫星着陆系统(GLS) /
- 精密进近 /
- 完好性 /
- 接收机钟差 /
- 精度
Abstract: As an advanced aviation new technology, the GBAS landing system (GLS) of satellite navigation plays an important role in providing signal correction and enhancement service for airborne precision approach in terminal area, and in realizing the function of high-precision departure and precision approach of the whole system. GLS integrity is an important parameter of terminal area approach and landing guidance application, which is an important basis for reliability. However, at present, ordinary users only pay attention to the accuracy of navigation and positioning, and do not consider the reliability of positioning results. The airborne of navigation field has high requirements for the reliability of positioning results. Therefore, this paper studies and analyzes the integrity fault monitoring performance. A clock error adjustment strategy is proposed, and the effectiveness of the method is verified by simulation, the influence of interity fault removed and non-removal on positioning accuracy and integrity is given. It is proved that integrity fault monitoring can ensure the system performance, operation ability and safety performance of GLS to meet the expected requirements.-
Key words:
- the GBAS landing system (GLS) /
- precision approach /
- integrity /
- clock error /
- accuracy
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表 1 CAT I类GLS性能要求
精度 95% 水平：16 m；垂直：4 m 完好性 告警门限
完好性风险
告警时间水平：40 m；垂直：10 m
2×10−7/150 s
6 s连续性 连续性风险 8×10−6/15 s 可用性 0.999～0.999 99 
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