基于数字孪生的导航球面信号覆盖分析与研究
中国民用航空华东地区空中交通管理局, 设备运行监控中心, 上海 200335
| 摘 要： | 本文研究导航设备在一定飞行高度层下，具有等高层特性信号的覆盖情况。利用数字孪生的设计思想，对真实的航向天线阵列系统进行仿真建模，建立水平方向，垂直方向，以及三维空间的电磁辐射模型。在广域飞行范围内，二维平面飞行与等高面曲面存在明显的差异。考虑地球球面特征的几何形态，修正了地球曲率引起的几何误差以及信号偏差，建立四个飞行高度层（h= 200 m, 400 m, 600 m, 800 m），逐一分析了飞机在进近飞行区域的覆盖情况，并按飞行校验的信号强度和覆盖范围对比。结果表明：在进近高度上，航向信标提供的电磁信号足够满足覆盖要求。高度层越高，覆盖范围越大，在低高度层h= 200 m以下，在不同方位角上逐渐不能满足要求。球面信号特征的分析手段为后续导航覆盖分析提供了有效研究方法。 |
| 关 键 词： | 航向天线; 数字孪生; 球面覆盖 |
| DOI： | 10.57237/j.cst.2024.04.002 |
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收稿日期: 2024-09-01
接受日期: 2024-11-01
在线出版日期: 2024-12-23
Analysis on Spherical Signal Coverage of Navigation Based on Digital Twin
Equipment Operation Monitoring Center, East China Regional Air Traffic Management Bureau of Civil Aviation of China, Shanghai 200335, China
| Abstract: | This paper studies the signal coverage of navigation equipment with equal high-level characteristics at a certain flight altitude, namely in contour plane. The real localizer antenna array system was simulated by the design of digital twin. The horizontal pattern and the vertical pattern of antenna array were researchedconsequently, the space electromagnetic radiation model was established. When aircraft is fling in wide area, there are obvious differences between two dimension plane and contour plane. Considering the geometric shape of the spherical characteristics of Earth, the geometric error and signal deviation caused by the Earth curvature were revised. Four contour plane flight levels (H = 200 m, 400 m, 600 m and 800 m) were established. The circumstances of coverage in the aircraft approach area is analyzed one by one. Also, four conditions were compared with fight checking by signal strength and coverage. The results showed that the electromagnetic signal provided by the localizer beacon is enough to meet the coverage requirements at the approach altitude. The higher the altitude, the larger the coverage zone. Under the low altitude H = 200m, it starts to appear coverage insufficient in different azimuth angles. Consequently, this analysis method of spherical signal features provides an effective research method for subsequent navigation coverage analysis. |
| Keywords: | Localizer Antenna; Digital Twin; Shperical Coverage |
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