基于PO-PTD的航空器对下滑道结构影响的动态研究

下滑信标是仪表着陆系统的重要组成部分,为进近中的航空器提供垂直方位引导。进行障碍物对下滑信标信号影响的精确分析可以为导航台站选址及解决导航台运行中存在的问题提供理论依据。本文基于物理光学-物理绕射理论(Physical optics-physical theory of diffraction,PO-PTD)算法,结合空客A320-200型客机以及机场三维模型对下滑信标的下滑道结构影响进行了静态分析。在静态分析的基础上,对飞机在滑行道上滑行且五边上有飞机进近时的影响进行了动态研究,找出了某机场飞行员长期反映的下滑道信号不稳问题的原因。动态研究数据与飞行校验结果进行了比对并与飞行校验结果吻合。

Dynamic Research on Glide-Slope Approach Based on PO-PTD

Glide-slope is an important part of the instrument landing system (ILS) offering vertical azimuth guidance for approaching aircraft. Accurate analysis of the influence of obstacles on the glide-slope signal can provide theoretical basis for the siting of a navigation facility and for the resolution of problems existing in the actual operation of the navigation facility. Based on the physical optics-physical theory of diffraction (PO-PTD) algorithm, combined with the Airbus A320-200 and the three-dimensional airport model, a static analysis of the influence is studied on glide slope approach. Based on the static analysis, a dynamic research is carried out on the influence from sliding aircraft on the taxiway meanwhile aircraft approaching in the final stage of airfield traffic pattern, which identified the cause of instability of the glide-slope signal reported by pilots for long time at an airport. Data of dynamic research is compared with the flight inspection result and found to be consistent with the flight inspection result.