级间分离二级折叠尾翼展开动力学仿真

针对两级火箭在级间分离时二级折叠尾翼的展开问题,研究了尾翼展开时间的影响因素。首先分析了尾翼展开片数对飞行器静稳定性的影响,然后根据单片翼面所受到的力矩,建立了二级折叠尾翼展开动力学方程,得到单片翼面展开过程中翼面张角与力矩的变化,最后使用ADAMS软件对六片翼面进行动力学仿真,对翼面展开的同步性进行计算,为折叠尾翼的弹簧设计和级间分离点的选择提供理论依据。

Dynamic Simulation of the second Stage Foldable Fin unfolding during the Stage Separation

To solve the problem of the second stage foldable fin during the stage separation, a dynamic equation was presented. First, the unfolded number of foldable fin influencing the static stability of aircraft was analysed. Then, according to the moment against to single fin, a second stage foldable fin unfolding dynamic equations was presented and with the divergence angle change by moment was obtained. At last, six fins numerical simulation using ADAMS software are carried out. The simulation obtained the synchronism of six fin. The results provide theory evidence for foldable fin spring design and the height of stage separation.