运载器-分离体分离过程耦合动力学仿真

Coupling dynamics simulation in the separation process of carrier-separated body

考虑了运载器、分离体及牵引稳定伞的相互耦合作用,针对运载器-分离体的高空、超声速、内置式分离,建立了合理的多体系统动力学模型及系统的动力学方程组和约束方程组,模拟了分离体与运载器分离的整个过程。仿真结果表明,牵引稳定伞阻力特征的大小对系统的分离有较大的影响,且牵引稳定伞能够有效地制约分离体出舱过程中的运动,使其能够获得姿态相对稳定的点火状态及时刻;同时验证了利用牵引稳定伞安全分离的方案是可行的。

Taking coupling effects of carrier,separated body and extraction-stabilization parachute into consideration,a reasonable multi-body system dynamics model is established for high altitude,supersonic speed,and built-in separation of the carrier-separated body. The kinematics constraint equations and flight dynamic equations obeyed by the system are derived,and the entire process of separated body and carrier separation is emulated. Simulation results show that drag characters of extraction-stabilization parachute have a great influence on the separation of the system,and the extraction-stabilization parachute can effectively restrain movement of separated body in the separation process so that it can obtain the ignition timing is relatively stable attitude,which also verified that using extraction-stabilization parachute safe separation scheme is feasible.