亚轨道飞行器发动机故障下飞行程序设计方法

Flight program design for suborbital reusable launch vehicle after engine failure

针对亚轨道飞行器单台发动机发生故障情况,提出了基于正指数攻角的发动机故障下飞行程序设计方法,给出了不同故障时刻的仿真结果,并与正常飞行情况进行了比较。仿真结果表明,对于不同故障时刻,该方法均能够在满足弯矩约束、攻角限制的情况下使得故障飞行器安全到达预定高度,为后续应急返回机动飞行提供有利的飞行条件。

A method of flight program design is proposed for ascent trajectory design after engine failure of suborbital reusable launch vehicle.The ascent flight program was designed in positive-index angle of attack.Some trajectories of atmosphere flight stage in different failure instants were simulated,and compared with nominal case.The final results show that the method works well,and can safely guide fault SRLV to the scheduled height,and simultaneously meets various constrains such as structure constrains and limits of angle of attack.