CAJ | 학술논문

为了研究等离子体对超高速模型雷达散射截面的影响,利用气动物理靶测量超高速模型及其绕流的雷达散射截面(RCS),给出了雷达接收信号、信号频谱和模型雷达散射截面的一维距离像.利用时域有限差分方法(FDTD)分析了等离子体鞘套对模型电磁散射特性的影响.将数值模拟结果和试验结果进行了对比,对比结果显示二者符合得很好.数值模拟结果还表明雷达入射角小角度偏移对测量结果有较大影响.
위료연구등리자체대초고속모형뢰체산사절면적영향,이용기동물리파측량초고속모형급기요류적뢰체산사절면(RCS),급출료뢰체접수신호、신호빈보화모형뢰체산사절면적일유거리상.이용시역유한차분방법(FDTD)분석료등리자체초투대모형전자산사특성적영향.장수치모의결과화시험결과진행료대비,대비결과현시이자부합득흔호.수치모의결과환표명뢰체입사각소각도편이대측량결과유교대영향.
The scattering characteristics of hypervelocity models are measured in the aero-physics range of CARDC (China Aerodynamics Research and Development Center) to research reentry electromagnetic phenomenology. The received radar signal and one-dimensional RCS image of hypervelocity models are obtained. According to these experiments, three-dimensional (3-D) finite-difference time-domain (FDTD) simulations are performed. The numerical results are in reasonable agreement with the experimental results. The simulating results also show the RCS of hypervelocity models will be changed obviously by the deviation of the incident radar wave angle.