基于差分GILS进近系统的导航精度分析

Improving the Lateral Navigation Performance Based on Differential GILS Approach System

通过研究飞机在低可见视程条件下的进近问题,力图充分利用全球卫星导航系统的能力,使机场在不需要更新陆基无线电导航系统的情况下从I类盲降标准提升到II类及以上的相同或可比拟的运行标准。通过对某航空公司飞行数据的分析,为提高飞机进场水平导航精度和完好性,提出了组合应用差分全球卫星导航系统GNSS(global navigation satellite system)和仪表着陆系统ILS(instrument landing system)下滑道的进近体制模型,即为GILS(GNSS and ILS-glideslope)进近系统。利用Kalman滤波的方法,将仪表着陆系统数据和差分全球卫星导航系统的定位数据融合,通过数学建模,仿真模拟飞机进近航迹。仿真和实际验证试飞数据表明,该方案可有效提高飞机的水平导航精度和完好性水平,有潜力将CAT I标准提升为类CAT II水平。

Through to a research on approach in the low visibility conditions,making full use of Global Navigation Satellite System which was autonomously controlled by our country to help the airports without updating the ground-based radio navigation equipment from Instrument Landing System Category I to Category II of the same on analogous the operational standards.According to analyze the flight data of an airline,It introduces the model of differential Global Navigation Satellite System（ GNSS） integrating with Instrument Landing System（ ILS） Glideslope approach system,to be considered as GILS（ GNSS and ILS-glideslope） approach system,in order to improve the level of the plane in navigation precision and integrity.Kalman filtering is employed to combine the location data of differential GNSS with ILS.It will simulate the approach path by mathematical modeling.Both the simulation and the actual flight data show this scheme can effectively improve the level of the navigation precision and integrity and also has the potential to promote CAT I to CAT II.