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本文介绍用缩比仿真方法观测JEM效应对雷达引信启动特性的影响。由于目标运动而出现多普勒(Dopple)回波信号。除此之外,喷气飞机的引擎高速压缩机旋转叶片会产生对电磁波的调制效应(称为JEM效应)并使频谱加宽。JEM效应频谱出现在机身多普勒频谱的高低两旁,有时它会比机身回波信号强,在这种情况下有可能对连续波或者脉冲体制的雷达引信产生于抗并破坏了所选择的最佳启爆点。大量试验和分析是用几个飞机模型完成的,而测试系统是属连续波双基地雷达体制,但是引用国外文献对脉冲雷达体制所得出的JEM效应频谱进行了分析并指出了对这种雷达引信体制可能产生的影响。另外,本文还从仿真技术方面论述了JEM的产生以及对引信启动特性的影响。大量的试验结果所得出的图表和国外资料也作了比较,进一步加深了对JEM效应的研究。
This article describes the effect of the JEM effect on the start-up characteristics of a radar fuze using a reduced-ratio simulation method. Dopple echo signals appear due to the target motion. In addition, the jet engine’s high-speed compressor rotor blades generate modulating electromagnetic waves (called the JEM effect) and widen the spectrum. JEM effect spectrum appears on both sides of the fuselage Doppler spectrum, and sometimes it will be stronger than the body echo signal, in which case it is possible for the continuous wave or pulse radar system fuze generated in the anti-corruption and the destruction of the selected The best explosion point. A large number of experiments and analyzes are carried out by several aircraft models, and the test system is a continuous wave bistatic radar system. However, the foreign literature has analyzed the JEM effect spectrum obtained from the pulsed radar system and pointed out that for this kind of radar fuze The possible impact of the system. In addition, the paper also discusses the generation of JEM and its influence on the fuze start-up characteristics from the aspect of simulation technology. A large number of test results obtained from the charts and foreign data were also compared to further deepen the study of the JEM effect.