载人航天器低空应急救生分离时刻计算

讨论了载人航天器低空应急救生时返回舱与逃逸飞行器分离时刻Ｔａ的计算方法。首先推导了逃逸弹道的近似解；然后提出了基于近似解的返回舱与逃逸飞行器分离时刻Ｔａ的实时确定方法；最后，仿真分析了该方法对提高载人航天器低空逃逸救生概率的作用，证明利用近似解实时求解分离时间Ｔａ是一种简单实用、效果明显的方法。

An Algorithm for Separation Time of Manned Spacecraft Emergency Rescue at Low Altitude

An algorithm for separation time T a of manned spacecraft reentry capsule from escape system is discussed.At first,an approximate solution of escape trajectory is deduced.Then,a real-time algorithm for separation time T a is presented,which is based on the approximate solution.Finally this simple algorithm is proved to be useful for increasing the probability of success of emergency rescue by numerical simulation.