RF航段衔接ILS进近程序的最大下降角设计方法  

Maximum Descent Angle Design Method for RF segment to ILS Precision Approach

作　　者：赖欣[1] 赵得存 LAI Xin;ZHAO Decun(College of Air Traffic Management,Civil Aviation Flight University of China,Guanghan 618307,China)

机构地区：[1]中国民用航空飞行学院空中交通管理学院,广汉618307

出　　处：《航空工程进展》2021年第6期86-90,100,共6页Advances in Aeronautical Science and Engineering

基　　金：民航技术创新和教育培训基金(0251812);中央高校教育教学改革专项基金(E2020035)。

摘　　要：RNP程序的RF航段与传统ILS精密进近程序相结合能充分利用两类程序的优势,但两种程序的过渡阶段需要考虑最大下降角度的设计。本文分析过渡阶段程序的平面与剖面几何设计参数限制条件,以及从星基导航方式转为陆基无线电导航方式需要稳定截获航向信号与下滑台信号的运行限制条件;结合两种限制条件,设计一种可以从不同最后进近定位点(FAP)高度计算下滑道的偏离量与到最后航向截获点(FACF)的弧距离关系进行判断,从而确定最大下降角度的方法,并进行仿真验证。结果表明:该方法可以在不同过渡航渡长度与不同最后进近下降角度的限制下,根据给定最高程序假设温度计算得到符合两种限制条件的最大下降角,为RNP程序与ILS程序衔接过渡的下降剖面设计提供了一种基于理论基础且具有可行性的设计方法。The combination of the radius to fix(RF)segment of the required navigation performance(RNP)proce⁃dure and traditional instrument landing system(ILS)precision approach procedure can make full use of the advan⁃tages of the two types of procedures,but the transition phase of the two procedures needs to consider the design of the maximum descent angle.The plane and section geometric design parameter limitations of the transition phase procedure,and the operating limitations of the transition from satellite-based navigation to ground-based radio navi⁃gation that require stable interception of heading signals and glide slope signals are analyzed in this paper.Combin⁃ing two types of limitations,a method that can calculate the relationship between the deviation of the glide path and the arc distance to the final approach course fix point(FACF)from different final approach point(FAP)heights is designed to determine the maximum descent angle,and the method is performed with simulation verification.The results show that the proposed method can calculate the maximum descent angle that meets the two types of limita⁃tions under the different transitional flight lengths and different final approach descent angles,and according to the given maximum program hypothetical temperature.This method provides a theoretical basis and feasible design method for the descending profile design of the transition between the RNP procedure and the ILS procedure.

关 键 词：飞行程序设计 所需导航性能 仪表着陆系统 固定半径转弯航段 运行限制 最大下降角度 

分 类 号：V355[航空宇航科学与技术—人机与环境工程]