雷达散射截面对飞机生存力的影响

飞机的雷达散射截面(RCS)是影响飞机生存力的重要因素之一.建立了飞机对由预警雷达、截击机和地空导弹组成的现代化空防系统的生存概率的计算方法.其中包括发现概率、击中概率和击毁概率的计算.在计算发现概率时,考虑了天线方向图传播因子和大气损耗的影响;在计算击中概率时,考虑了信噪比对脱靶距离的影响.通过计算,分析飞机的RCS对生存力的影响.研究结果表明,减缩飞机的RCS不仅可以显著降低飞机被探测的概率,而且还可以缩短截击机和地空导弹对飞机的最远拦截距离.为提高飞机的生存力必须降低飞机的RCS.

Effect of Radar Cross Section on Aircraft Survivability

Radar cross section (RCS) of an aircraft is one of the important influences on aircraft survivability. A computational method for the probability that an aircraft survives hostile air defense system consisting of early warning radar, interceptor and surface to air missile has been developed in this paper. The method includes calculation of the probability of detection, the probability of hit and the probability of kill. The influence of the pattern propagation factor and atmospheric loss and the influence of signal to noise radio on miss distance are considered in calculating the probability of detection and the probability of hit, respectively. The effect of RCS on aircraft's survivability is analyzed by the calculation. The results show that reduction of aircraft's RCS can remarkably reduce the probability of detection, and decrease the maximum intercept distance when interceptor and surface to air missile intercept penetrating aircraft. In order to enhance the aircraft survivability, its RCS must be reduced.