基于地形遮蔽的自旋弹测高雷达回波建模与仿真

doi:10.12305/j.issn.1001-506X.2021.10.16

摘要/Abstract

摘要：

为解决导弹自旋运动模型复杂、建模计算量大的问题, 建立了一种新的导弹自旋运动模型。在该运动模型的基础上, 考虑了地形起伏对弹载测高雷达回波遮挡的影响, 利用仿真地形, 采用地形遮蔽算法, 建立地形遮挡下的雷达回波模型, 仿真得到不同高度下的雷达回波图和频谱图。通过对回波的分析、得到在高度为10 km, 雷达斜照射角度超过65.3°时, 地形起伏对于雷达回波有显著遮蔽影响雷达回波发生频谱搬移等若干结论。该结论与实际情况一致, 验证了模型的准确性, 为后续弹载测高雷达回波模拟提供一定的理论支撑。

关键词: 弹载测高雷达, 自旋运动模型, 仿真地形, 地形遮蔽算法, 遮挡回波模型

Abstract:

In order to solve the problems of complicated missile spin motion model and large amount of calculation, a new missile spin motion model is established. Based on the model, the effect of terrain fluctuation on the echo occlusion of missile-borne radar altimeter is considered. The simulation terrain and terrain occlusion algorithm are used to establish the radar echo model under terrain occlusion, and the simulation results of the radar echo and spectrum under different heights are obtained. Through the analysis of the echo, it is concluded that when the radar angle of oblique irradiation exceeds 65.3° at 10 km, the terrain relief has a significant effect on the radar echo shadowing and the frequency shift of radar echo occurs. The conclusion is consistent with the actual situation, which verifies the accuracy of the model, and it provides some theoretical support for the follow-up echo simulation of missile-borne radar altimeter.

Key words: missile-borne radar altimeter, spin motion model, simulation terrain, terrain occlusion algorithm, occlusion echo model

中图分类号:

TN955

王安吉, 曹菲, 许剑锋, 秦建强, 薛春岭. 基于地形遮蔽的自旋弹测高雷达回波建模与仿真[J]. 系统工程与电子技术, 2021, 43(10): 2828-2835.

Anji WANG, Fei CAO, Jianfeng XU, Jianqiang QIN, Chunling XUE. Modeling and simulation of spin missile-borne altimeter echo based on terrain occlusion[J]. Systems Engineering and Electronics, 2021, 43(10): 2828-2835.

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