密集扫频干扰下调频连续波引信响应特性  

Response Characteristics of Frequency-modulated Continuous Wave Fuze under Dense Sweep Jamming

作　　者：周文 郝新红[1] 杨瑾[1] 段乐帆 ZHOU Wen;HAO Xinhong;YANG Jin;DUAN Lefan(Science and Technology on Electromechanical Dynamic Control Laboratory,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学机电动态控制重点实验室,北京100081

出　　处：《兵工学报》2024年第7期2251-2259,共9页Acta Armamentarii

基　　金：国家自然科学基金项目(61871414)。

摘　　要：密集扫频干扰作为一种典型的压制式干扰方式,在实际战场使用中对调频连续波引信产生巨大威胁。针对调频连续波引信在密集扫频干扰下容易失效的问题,在分析调频连续波引信工作原理的基础上,推导密集扫频干扰下的调频连续波引信响应过程,进一步分析采用时域干扰样本归零抗干扰方法后的等效干扰效果,并进行相关的仿真分析及实验验证。仿真及实测实验结果表明:密集扫频干扰信号与引信信号越相似,在差频信号时域样本中的有效干扰比例就越大;进行时域干扰样本归零处理后,将产生对调频连续波引信真实目标信号的间歇采样转发干扰效果,距离维包络上将产生多个假目标,假目标的分布与归零处理后的等效占空比及干扰频率相关,导致调频连续波引信的炸点散布显著增大。As a typical suppressed jamming method,the dense sweep jamming poses a huge threat to frequency-modulated continuous wave(FMCW)fuze in the actual battlefield.Aiming at the problem that FMCW fuze is easy to fail under dense sweep jamming,the response process of FMCW fuze under dense sweep jamming is deduced on the basis of analyzing the working principle of FMCW fuze.Equivalent jamming effect after using zero time-domain interference sample is further analyzed,and the relevant simulation analysis and experimental verification are carried out.The simulated and experimental results show that the more similar the dense sweep jamming signal to the fuze signal,the larger the effective jamming proportion in the time-domain sample of beat frequency signal is.The interrupted-sampling and repeater jamming effect on the real target signal of FMCW fuze is produced after zeroing the interfered samples in time domain.Multiple false targets are generated on the envelope of distance dimension.The distribution of false targets is related to the equivalent duty cycle and jamming frequency after zeroing processing,which results in a significant increase in the explosion point dispersion of FMCW fuze.

关 键 词：调频连续波引信 密集扫频干扰 归零处理 间歇采样转发干扰 响应特性 

分 类 号：TJ434.1[兵器科学与技术—火炮、自动武器与弹药工程]