低轨道空间箔条干扰的扩散模型  

Chaff Jamming Diffusion Model in Low Orbit Space

作　　者：李金梁[1] 李永祯[1] 王雪松[1] 肖顺平[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院,长沙410073

出　　处：《宇航学报》2010年第4期1237-1243,共7页Journal of Astronautics

基　　金：国家自然科学基金(60802078)

摘　　要：基于稀薄气体动力学对低轨道空间箔条干扰受到的大气阻力进行分析,得到了箔条阻力系数的近似表达式。针对箔条云扩散的宏观特性,得到了抛撒后箔条云质心与被掩护目标相对运动的模型。基于此模型,对低轨道空间箔条干扰抛撒后能否将被掩护目标包覆在其中以起到良好干扰效果的问题进行了研究,分析了不同抛撒时刻对箔条云有效作用时间的影响,给出了低轨道空间箔条云抛撒时刻的建议。在箔条云扩散的微观特性方面,对箔条云内部的密度分布以及箔条姿态的统计分布规律进行了分析,得到了箔条干扰抛撒后的扩散演化模型。研究为箔条干扰的研发提供了理论指导。Based on rarefied gas dynamics,the force of gas to chaff jamming in low orbit space is analyzed,and an approximate formula of chaff＇s drag coefficient is gained.In the aspect of chaff diffusion＇s macroscopic characteristics,the model for relative movement between chaff cloud＇s mass center and the covered target is presented.Based on this model,the problem whether chaff cloud can include the covered target and work well after release is studied.The influence of different release time to chaff cloud＇s effect time is analyzed and advice for chaff cloud＇s release time in low orbit space is proposed.In the aspect of chaff diffusion＇s microscopic characteristics,the statistical distribution law of density in the chaff cloud and gesture of chaff is analyzed.A diffusion model for chaff jamming after release is presented.The work in this paper provides chaff cloud development with theory guide.

关 键 词：稀薄气体动力学 阻力系数 箔条云 扩散模型 质心 

分 类 号：TN95[电子电信—信号与信息处理]