基于扰动大气模型的动力推进高超声速飞行器弹道特性分析

在半速度坐标系建立动力推进高超声速飞行器质心动力学方程,并进行了弹道仿真,分析了初始点参数和飞行设计参数对标准弹道影响,完成了标准大气和扰动大气模型中飞行器跳跃弹道高度、过载、热流特性的对比分析.将地球扰动大气模型应用于飞行器跳跃弹道分析,讨论了不同大气模型对动力推进高超声速飞行器跳跃弹道影响.仿真结果表明,大气参数变化对高超声速飞行器跳跃弹道最低点、最大过载、最大驻点热流和总吸热量等参数影响明显, 该结论对飞行器总体、结构、动力、热防护、导航、制导与控制系统前期设计工作有一定参考价值.

Trajectories Analyse for Hypersonic Vehicle with Scramjet Based on Perturbation Atmosphere Model

Hypersonic vehicle with scramjet is a new kind of vehicle with bright future.With a study of its standard trajectories in half-velocity coordinate system,the fly velocity and design parameters were found to be the main factors to influence its skipping trajectories.The trajectory simulations in perturbation and standard atmosphere models showed that change of atmosphere parameters could influence the height,maximal load,maximal heat and total heat of trajectories.These factors should be considered while studying the vehicle design parameters,structure parameters,heat shield system and guide navigate and control(GN&C) system.