基于Baro-VNAV气压式垂直导航的PBN进近程序研究

Research on PBN Approach Procedure Based on Baro-VNAV Pneumatic Vertical Navigation

指出了当前民航业传统的飞行程序已逐渐被基于性能导航(Performance based navigation,PBN)飞行程序所替代,PBN进离场及进近航线设计过程中,可以灵活处理,导航点的设置不用过于依赖地面导航台的位置。然而,PBN进近程序若采用气压表垂直引导的类精密进近方式,则需要考虑到机场的温度限制,一般温度越低,气压越低,因此,飞机上指示的高度比实际飞行高度要高,超障余度不足,可能导致飞机低飞与障碍物发生碰撞的危险。根据DOC8168文件规范,通过举例研究了PBN基于气压高度表垂直引导的进近程序如何设计,并给出了设计流程方案,该方案有利于Baro-VNAV气压式垂直导航的进近程序设计,并具有很好的可靠性和适用性。

At present,the traditional flight procedures of civil aviation industry have been gradually replaced by performance-based navigation(PBN)flight procedures.Due to the PBN approach and departure procedures design,it can be handled flexibly,and the setting of navigation points does not depend too much on the position of ground navigation station.However,if the PBN approach procedure adopts the pneumatic vertical guidance precision approach method,the temperature limit of the airport should be considered.In general,the lower the temperature,the lower the air pressure.Therefore,the altitude indicated on the aircraft is higher than the actual flight altitude,and the obstacle clearance is insufficient,which may lead to the risk of collision between the aircraft and obstacles.According to Doc8168 file specification,this paper studies how to design PBN approach program based on barometric altimeter vertical guidance through examples,and gives the design process scheme.This scheme with good reliability and applicability is conducive to the approach program design of Baro-VNAV barometric vertical navigation.