地杂波引起的引信早炸问题研究

Research on Early Burst of the Fuse Caused by Ground Clutter

由于雷达引信载体运动的高速性,引信工作的近程性,使得引信在低空作战时,地杂波信号极易诱使引信早炸。为解决这一问题,通过建立基于网格映象法的地杂波回波信号的仿真模型,分析了引信地杂波信号特性,提出利用经验判据对回波信号进行频率识别以及对回波信号进行窄带滤波等途径来克服地杂波导致的引信早炸问题。研究结果为日后进一步提高引信抗干扰性能提供了技术依据。

Because of the high moving speed of the radar fuse carrier and the short working range of the fuse, in low latitude fight, the ground clutter is more apt to make the fuse burst ahead of the time. This paper sets up a simulation model of the ground clutter echo based on the net image method, analyzes the characteristic of the video signal of the ground clutter received by the fuse, and puts forward utilizing experience criterion to distinguish useful signal from the ground clutter, and using the narrow bandwidth filter to reject the ground clutter which can easily cause early burst of the fuse. The research result provides a technical basis for raising the anti -jamming performance of the fuse still further in the future, and it is very significant for raising the fight performance of the air defense weapon system.