基于参考椭球的高超声速滑翔飞行器弹道仿真

Trajectory Simulation of Hypersonic Gliding Vehicle Based on Reference Ellipsoid

高超声速滑翔飞行器独特的运动特性给反导预警系统带来巨大挑战,为更加精确地对其弹道进行描述,基于地球的参考椭球模型,分别推导出高超声速滑翔飞行器处于滑翔段时的动力学和运动学方程组,最后对其进行弹道仿真并与基于地球圆球假设的弹道进行对比。仿真结果表明,弹道各参数在两种假设条件下有着不同程度的随时间增大的误差,针对长时间远距离飞行的高超声速滑翔飞行器的稳定跟踪及弹道估计等问题,建议采用文中建立的运动方程进行弹道仿真。

The unique motion characteristics of hypersonic gilding vehicle bring huge challenges to anti-missile early warning system. In order to describe its trajectory more accurately, the dynamics and kinematics equations of hypersonic gliding vehicle in gliding phase were derived respectively based on the Earth’s reference ellipsoid model. Finally, its trajectory was simulated and compared with the trajectory under the Earth’s sphere hypothesis. The simulation results show that the error of trajectory parameters increases with time to varying degrees under two assumptions. Aiming at the problems of stable tracking and trajectory estimation of hypersonic gliding vehicle with long-distance flight, it is suggested that the motion equation established in this paper be used for trajectory simulation.