隐身飞机投弹对雷达检测性能的影响

Influence on Radar Detection Performance from Launching Missiles of Stealth Aircraft

针对空战中隐身飞机投弹会影响雷达检测性能的问题,提出了一种基于向站平飞的投弹航迹模型以模拟飞机正常飞行和投弹飞行两种状态。利用雷达和飞机的相对位置关系获取了不同飞行状态下动态RCS在时间序列上的起伏变化,并计算了信噪比。结合检测概率原理,分别仿真了不同飞行状态下雷达瞬时检测概率在时间序列上的变化结果。设置两种雷达扫描周期,得到了扫描次数不同时不同飞行航迹下的累积检测概率。结果表明:隐身飞机投弹能够提高雷达的累积检测性能,且在一定程度上增强了防空雷达的预警探测能力。

Aimed at influence of stealth aircraft launching-missiles upon radar detection performance in air combat,a track model of launching missiles based on the level flight model close to the radar is proposed,which mimickes normal flight condition and launching missiles flight condition of aircraft.And the fluctuation variable of dynamic RCS in time sequence is obtained under various flight conditions by utilizing relative position relationship between radar and aircraft,and counts signal-tonoise ratio.Combined with detection probability theory,radar momentary detection probability simulation results varying in time sequence are obtained respectively under various flight conditions.And the accumulate detection probability of different scanning frequency is gotten under various flight track via setting two kinds of different radar searching period.The results show that stealth aircraft launching-missiles can have an effect on radar accumulate detection performance,and to a certain extent,strengthened the early warning detection capability of the air-defense radar.