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降雨对毫米波引信多普勒频率影响的分析对于采用多普勒信息作为近炸或碰炸判据的毫米波引信的开发和应用具有重要的实际意义。文中分别给出了弹目交会过程中不同脱靶量时的运动目标或降雨产生的多普勒频率随交会到达时间或距离变化的计算结果。通过分析可看出,在一定脱靶量的情况下,当弹目交会距离较远时,目标和降雨雨滴产生的多普勒频率差较显著;随着交会距离的逐渐减小,多普勒频率差别逐渐减小,特别在引信作用和起爆的近距离处,约30米内,降雨的多普勒频率和目标的多普勒频率逐渐混叠在一起,会对目标的多普勒信号产生较大的影响。那么,对于较宽的脉冲波束、大降雨量或较小目标的情况,降雨的影响会更大,必须要考虑。
The analysis of the influence of rainfall on the Doppler frequency of the millimeter-wave fuze is of great practical significance for the development and application of the millimeter-wave fuze that uses Doppler information as a criterion for near-blast or blast-impact. The calculation results of the Doppler frequency with rainfall or the time of arrival or the change of the distance of the cross-event are given in the paper respectively. Through the analysis, it can be seen that the Doppler frequency difference between the target and the rainfall and raindrop is significant when the distance between the missiles is far, and as the intersection distance decreases, the Doppler frequency The difference gradually decreases. Especially at the close range of fuze effect and detonation, the Doppler frequency of rainfall and the Doppler frequency of the target gradually overlap within about 30 meters, and the Doppler signal of the target will be greatly generated Impact. Then, for wider pulse beams, heavy rainfall or smaller targets, the impact of rainfall will be greater and must be considered.