北京航空航天大学学报 ›› 2017, Vol. 43 ›› Issue (9): 1882-1890.doi: 10.13700/j.bh.1001-5965.2016.0665

• 论文 • 上一篇    下一篇

非标称对流层误差对GBAS完好性的影响

辛蒲敏, 王志鹏   

  1. 北京航空航天大学 电子信息工程学院, 北京 100083
  • 收稿日期:2016-08-17 出版日期:2017-09-20 发布日期:2017-01-13
  • 通讯作者: 王志鹏,E-mail:wangzhipeng@buaa.edu.cn E-mail:wangzhipeng@buaa.edu.cn
  • 作者简介:辛蒲敏,女,硕士研究生;主要研究方向:导航和GBAS性能评估;王志鹏,男,博士,讲师,硕士生导师;主要研究方向:卫星导航民航/军航/通航应用的完好性监测技术
  • 基金资助:
    国家自然科学基金(61501010);航空科学基金(2015ZC51035);北京市自然科学基金(4154078)

Impact of non-nominal troposphere error on GBAS integrity

XIN Pumin, WANG Zhipeng   

  1. School of Electronic and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
  • Received:2016-08-17 Online:2017-09-20 Published:2017-01-13
  • Supported by:
    National Natural Science Foundation of China (61501010); Aeronautical Science Foundation of China (2015ZC51035); Natural Science Foundation of Beijing (4154078)

摘要: 地基增强系统(GBAS)中,非标称对流层误差引起的平均垂直保护级(VPL)增量为2.29 m,误差包络精度降低,系统完好性风险增大。针对上述问题,基于修正的Hopfield模型,综合考虑天气和卫星仰角实时变化情况,以及飞机与地面站的实时距离,提出一种实时计算非标称对流层误差的方法;鉴于该方法对甚高频频数据播发(VDB)传输带宽要求较高,提出拟合计算方法,将实时误差拟合为距离和卫星仰角的函数。仿真计算单点、进近区和终端区3种飞行场景下的VPL,分析非标称对流层误差对GBAS完好性的影响,结果表明:采用实时计算方法时,平均VPL增量为1.55 m,非标称对流层误差的包络精度提高32.52%;采用拟合计算方法时,平均VPL增量为1.27 m,包络精度提高44.54%,VDB传输数据减少,GBAS完好性风险降低。

关键词: 地基增强系统(GBAS), 完好性, 垂直保护级(VPL), 非标称对流层误差, Hopfield模型

Abstract: In current ground-based augmentation system (GBAS), the average vertical protection level(VPL) increase caused by non-nominal troposphere error is 2.29 m, the accuracy of bounding is reduced and the integrity risk is increased. Faced with the above problems, a real-time method was proposed based on the modified Hopfield model. With real-time method, the non-nominal troposphere error was calculated according to the real-time weather changes, satellite elevation angle and the distance between aircraft and ground station. Given the high requirement of the real-time method for very high frequency data broadcast(VDB) transmission bandwidth, a fitting method was proposed, in which error is a function of distance and elevation angle. Simulations compute the VPL under the flight scenarios of single point, approach area and terminal area with the aim of evaluating the impact of non-nominal troposphere error on GBAS integrity. The results show that, with the real-time bounding method, VPL is averagely increased by 1.55 m and the accuracy of bounding is increased by 32.52%; with fitting method, VPL is averagely increased by 1.27 m, the accuracy of bounding is increased by 44.54%, the VDB transmission data is less, and the GBAS integrity risk is decreased.

Key words: ground-based augmentation system (GBAS), integrity, vertical protection level (VPL), non-nominal troposphere error, Hopfield model

中图分类号: 


版权所有 © 《北京航空航天大学学报》编辑部
通讯地址:北京市海淀区学院路37号 北京航空航天大学学报编辑部 邮编:100191 E-mail:jbuaa@buaa.edu.cn
本系统由北京玛格泰克科技发展有限公司设计开发