The security separation condition is one of the separation difficulties. A hypersonic multi-sub-vehicle abdominal separation method was put forward for hypersonic vehicle separation in this paper. The 12-freedom multi-rigid-body model of separation system were built based on vector mechanics. Then the accurate expressions were obtained. The separation method was verified by taking a hypersonic reentry vehicle as simulation example. The simulation results of the whole procedure verified the separation mode. At last, the influences of altitude on separation systems were obtained. The modeling method and the simulation results provide reference in further research on hypersonic vehicle separation.%研究高超声速飞行器安全分离发射条件的确定是分离问题.腹抛多子分离过程,是根据矢量力学理论对子母分离体耦合运动进行12自由度多刚体动力学建模,得到描述分离过程的准确数学模型.以某高超声速多子分离再入飞行器为例,对分离进行全过程仿真,结果验证了提出的分离方法的正确性.仿真结果得到了分离高度对安全分离条件范围的影响,为高超声速多子分离发射过程的研究提供了参考和依据.
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