针对实战中隐身飞机随机抖振会影响雷达检测性能的问题,提出了一种基于正态分布的随机抖振模型。采用侧站盘旋模型和坐标系转换关系解算了视线姿态角,利用姿态角抖振方差和抖振强度的线性关系,设定了三类不同的抖振强度以修正视线姿态角。结合雷达距离方程和检测概率公式,分别得到了不同抖振强度下雷达探测距离和检测概率在时间序列上变化的仿真结果,并对雷达累积检测概率进行了分析。结果表明:隐身飞机随机抖振能够对雷达的检测性能产生影响,且抖振幅度越强,雷达检测、识别目标的难度会更大。

Aimed at influence of random buffeting of stealth aircraft upon radar detection performance in actual combat, a model of random buffeting based on normal distribution is proposed. Spiral flight model next to the radar and conversion relationship between coordinate systems is adopted calculating attitude angle, and three kinds of different buffeting strength is set amending attitude angle by utilizing linear relationship between buffeting variance and buffeting strength of attitude angle. Combined with radar range equation and detection probability formula, radar detection range and detection probability simulation results varying in time sequence are obtained respectively under different buffeting strength, and radar cumulative detection probability is analyzed. The results show that random buffeting of stealth aircraft can have an effect on radar detection performance, and the stronger buffeting amplitude becomes, the harder the ability of radar detecting and distinguishing target would be.

TN95