火箭助推器回收稳定减速阶段动力学仿真分析

Dynamic simulation analysis on stabilization and deceleration stage of rocket booster recovery

针对火箭助推器的伞降回收稳定减速阶段,开展了助推器回收系统各部分受力分析,建立了多体系统的动力学方程组和约束方程组;同时搭建了火箭助推器回收系统的动力学模型,模拟了火箭助推器回收系统开始工作直至翼伞开伞前的整个过程。仿真结果表明:稳定伞和减速伞对火箭助推器起到了稳定姿态和减速作用,为翼伞开伞提供了条件;通过与试验数据的对比,验证了火箭助推器回收系统动力学模型的准确性。

Focusing on the parachute stabilization and deceleration stage of the rocket booster, the force analysis of each part of the booster recovery system was carried out. The dynamic equations and constraint equations of the multi-body system were established. The dynamic model of the rocket booster recovery system was built, and the whole process from the start of the rocket booster recovery system to the parafoil opening was simulated. The simulation results show that the stable parachute and the decelerating parachute play a role of stabilizing the attitude and the rocket booster deceleration, providing the opening conditions of the parafoil. By comparing with the experimental data, the accuracy of the dynamic model of the rocket booster recovery system is verified.