舰船目标雷达高分辨距离像的建模与仿真

Modeling and Simulation of Radar HRRP to Ship Targets

雷达高分辨距离像是舰船目标识别研究中的关键环节。针对大型舰船目标的雷达高分辨距离像难以进行实测和缩比测量的情况,采用理论建模计算方法获取舰船目标雷达高分辨距离像。首先建立舰船目标三维CAD模型,采用面元法对模型进行剖分并对面元遮挡进行判别计算;然后利用电磁计算软件得到各个姿态角下舰船目标的频域响应;之后进行IFFT获得目标雷达高分辨距离像;最后结合实际舰船目标,给出了具体建模和仿真计算的案例,并对仿真结果进行分析。

Radar High Resolution Range Profile （HRRP） is a key step in the research of ship target recognition. Considering that it is difficult to make actual measurement or scaling measurement to the HRRP of large naval vessels, we proposed an effective approach for obtaining radar HRRP to the naval ships based on theoretical modeling method. Firstly, three-dimensional CAD model of the naval vessel was established. Then, the model was parted based on the panel element method and shadow of panel element was calculated. The target frequency response over different attitude angles was obtained by using electromagnetic computing software. Finally, the radar HRRP was obtained by making inverse Fourier transform. Modeling and simulation are presented based on an actual ship target, and analysis was made to the simulation result.