三维飞机模型对盲降定位器的影响

J. Honda, Hisashi Yokoyama, H. Tajima, T. Otsuyama
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引用次数: 3

摘要

本文对在飞机水平位置为跑道中心线提供制导的盲降子系统定位器进行了数值模拟。LOC发射两种类型的信号,即90 Hz和150 Hz调制的载波和边带波。LOC的性能由调制深度差(DDM)决定。然而,它们的信号受到障碍物的影响,如大型机库、航站楼和飞机。它们会导致DDM错误。本文分析了飞机对一频LOC (1fLOC)型LOC产生的多径干扰。介绍了一种简化的光线追踪方法,并采用三维飞机模型进行了数值模拟。讨论了飞机散射波对LOC参数的影响。
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Influences of 3D Aircraft Model to ILS Localizer
This paper is concerned with a numerical simulation of ILS subsystem Localizer (LOC) which provides the guidance in the horizontal position of an aircraft for the runway center line. The LOC emits two types of signals, that is, carrier wave and sideband waves modulated by a 90 Hz and a 150 Hz tone. The performance of the LOC is given by the difference in the depth of the modulation (DDM). However, their signals are influenced by obstacles, such as large hanger, terminal buildings and aircraft. They result in the DDM errors. In this paper, the authors analyze the multipath interferences caused by aircraft to LOC whose type is one frequency LOC (1fLOC). A simplified ray tracing method is introduced, and 3D aircraft model is used for numerical simulation. It is discussed how scattered waves from aircraft influence to the LOC specifications.
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