基于北斗系统的星基增强系统完好性指标分析与参数研究

发布时间：2018-05-18 20:51

本文选题：完好性参数 + 用户差分伪距误差　；参考：《中国民航大学》2014年硕士论文

【摘要】：本文着重对影响北斗卫星导航系统的完好性参数进行研究。在研究北斗星基增强系统的完好性参数之前,本文分析了GPS星基增强系统(WAAS)的完好性参数以及Galileo系统自身完好性参数。北斗星基增强系统目前公布的完好性参数为UDRE和GIVE。通过GPS、Galileo系统完好性参数的分析,来得到北斗系统完好性增强的可能途径。本文对用户差分距离误差(UDRE)进行了计算,考虑使用模型化的方法来减弱对流层、电离层延迟等误差源的影响,建立了误差计算模型,搭建matlab仿真平台,最终得到UDRE的模拟仿真结果。电离层格网点垂直延迟误差(GIVE)也同样要进行了计算。本文选取Klobuchar模型,通过使用电离层网格化的方法来减小电离层延迟误差的影响。在模型化的过程中,对卫星信号的提取、卫星地空坐标转换、确定穿透点以及内插算法等方面进行了研究,最终建立了误差计算模型,搭建matlab仿真平台,通过实测数据,最终得到GIVE的模拟仿真结果。对水平保护级(HPL)和垂直保护级(VPL)进行了研究,通过观测矩阵建立了计算模型,通过matlab仿真得到HPL和VPL的离散分布图,将其与进近着陆阶段的导航性能要求做比较,为北斗系统更加广泛地应用于民航业提供参考。
[Abstract]:This paper focuses on the study of the parameters affecting the integrity of Beidou satellite navigation system. Before studying the integrity parameters of the GPS space-based enhancement system, the integrity parameters of the GPS space-based enhancement system and the Galileo system itself are analyzed in this paper. The completion parameters currently published by the system are UDRE and GIVE. Based on the analysis of the integrity parameters of GPS Galileo system, the possible ways to enhance the integrity of Beidou system are obtained. In this paper, the user differential distance error (UDREE) is calculated, and the influence of tropospheric and ionospheric delay is reduced by using modeling method. The error calculation model is established and the matlab simulation platform is built. Finally, the simulation results of UDRE are obtained. The ionospheric grid vertical-delay error (GIVE) is also calculated. In this paper, Klobuchar model is selected to reduce the influence of ionospheric delay error by using ionospheric gridding. In the process of modeling, the extraction of satellite signal, the transformation of satellite ground to air coordinate, the determination of penetration point and interpolation algorithm are studied. Finally, the error calculation model is established, and the matlab simulation platform is built. Finally, the simulation results of GIVE are obtained. In this paper, the horizontal protection level and vertical protection level matlab are studied. The calculation model is established by observing matrix, and the discrete distribution of HPL and VPL are obtained by matlab simulation, and compared with the requirements of navigation performance in the approaching landing stage. It provides a reference for the application of Beidou system in the civil aviation industry.
【学位授予单位】：中国民航大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P228.4;TN967.1

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