典型隐身飞机动态RCS时间序列研究

定义和推导了目标机体坐标系与地面雷达坐标系之间的坐标转换关系式,得到了雷达视线在目标坐标系中的方位角和高低角.通过软件FEKO对典型隐身飞机目标F-22进行建模,计算得到了目标全空域的静态RCS值,并利用Matlab仿真分析了动态目标的RCS特性变化.仿真结果表明:不同飞行高度以及不同的航路捷径均可以影响机动目标的RCS序列,且当目标作适当的俯仰机动后,可以减小目标RCS值,给隐身飞机设计飞行航线模拟主动进攻提供仿真依据.

Analysis of Dynamic RCS Time Series of Typical Stealth Aircraft

The inter-coordinate transformation relation between target body coordinate and ground-based radar coordinate is defined and derived, the azimuth and the elevation of line of the sight of radar in target body coordinate are obtained in this paper. All-airspace static RCS value can be available by establishing typical stealth aircraft models, including F-22, in software FEKO and the RCS characteristic variation of the dynamic target is simulated and analyzed by using Matlab. The simulation results show that different altitudes and route shortcuts all can influence the RCS series of maneuver target, and the RCS value is lower when the target takes some proper pitch movement. Also the simulation can provide a foundation for the design of flight track for stealth aircraft in simulating active attack.