箔条云对飞机隐身特性的影响分析与计算

INFLUENCE ANALYSIS AND CALCULATION OF CHAFF CORRIDOR ON THE STEALTH PERFORMANCE OF AIRCRAFT

建立了箔条云对飞机隐身特性的影响分析与计算方法。考虑的对抗情况是突防方用一架飞机播撒箔条偶极子云 ,作战飞机以该箔条云带为掩护进行突防或调动。通过算例计算了箔条干扰及目标 RCS对飞行器隐身性能的影响。结论是 :在每千米突防路径上抛撒 60 0 0 0根数量的箔条就可以极大地提高飞行器的隐身能力 ,使得 RCS小于 1 0 0 m2 的目标难于被一般雷达探测到。即使雷达对于箔条杂波中可见度有 30 d B的改善 ,在箔条干扰下对目标的检测性能仍然不如在杂波和噪声条件下。应当指出 ,虽然计算结果表明箔条具有很好的干扰效果 ,但其应用应考虑到战场战术环境、天气条件等外界因素的限制和影响。

the method was formulated that can be used to calculate the stealth performance of aircraft shielded by chaff corridor. The antagonism case was considered that the attacker penetrates or translates under the shielding of a chaff corridor generated by another aircraft. Some examples, which calculated the impact of chaff and RCS of targets on stealth performance, were given. The conclusions were made as follows: throwing 60 000 pieces of chaff on the penetrating way can increase markedly the stealth ability of aircraft, and thus targets with RCS less than 100 square meters can hardly be detected by normal radar. Even though there is 30dB detectability improvement in clutter for radar, the detectability performance on condition of chaff jamming is still worse than on condition of surface clutter and noise. However it should be noted that the battle environment, the climate condition and other factors could also affect the outstanding jamming effect of chaff.