风轮机雷达散射特性仿真及微多普勒特征分析

发布时间：2018-08-12 20:47

【摘要】：风轮机复杂的电磁散射特性,会对其附近的空管通信、导航和监视等电子设备产生严重影响.研究风轮机的电磁散射特性,可为风轮机杂波检测和抑制提供理论依据,对保证空中交通安全具有重要的意义.论文首先基于风轮机散射点叠加的理论,考虑了雷达入射波到风轮机叶片和桅杆的初始相位以及入射波方位角和俯仰角对回波的影响,将单基地回波模型扩展到双基地模型.同时,在散射点叠加模型的基础上,提出了基于混合模型的风轮机散射特性分析.混合模型结合了散射点叠加模型和电磁仿真软件FEKO的优点,考虑了电磁波在叶片和桅杆上的反射系数等因素对回波的影响,可以实现任意观测点处的电磁散射特性计算及其微多普勒特征的分析.最后,分别对散射点叠加模型、FEKO以及混合模型的风轮机电磁散射特性分析方法进行了对比分析,给出了各自的优缺点及其适用场合.
[Abstract]:The complex electromagnetic scattering characteristics of wind turbines will have a serious impact on the air traffic control communications, navigation and surveillance and other electronic equipment nearby. The study of electromagnetic scattering characteristics of wind turbines can provide theoretical basis for clutter detection and suppression of wind turbines, and is of great significance to ensure air traffic safety. In addition, considering the effect of the initial phase of the radar incident wave on the blade and mast of the wind turbine and the azimuth and pitch angle of the incident wave on the echo, the monostatic echo model is extended to the bistatic model. Combining the advantages of the scattering point superposition model and the electromagnetic simulation software FEKO, the influence of the reflection coefficient of the electromagnetic wave on the blade and the mast on the echo is considered. The scattering characteristics of any observation point can be calculated and the micro-Doppler characteristics can be analyzed. The analysis methods of electromagnetic scattering characteristics of wind turbines are compared and analyzed. The advantages and disadvantages of each method and its application are given.
【作者单位】：中国民航大学天津市智能信号与图像处理重点实验室;
【基金】：国家自然科学基金委员会与中国民航局联合资助项目(U1533110) 国家自然科学基金项目(61571442) 中央高校基本科研业务费资助项目(3122015D005)
【分类号】：TN957.51

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