关键词: 运载器回收, 动力学建模, 碰撞, 稳定性

Abstract: At present, the reusability of vertical takeoff and landing vehicles is a direct and effective way to save a large amount of cost of space entry. If the carrier remains untilted throughout the landing until a safe landing, this means a successful recovery of the carrier. In the vertical landing and reusable carrier landing process, the use of landing devices to absorb impact energy to assist the carrier to achieve stability is the final step, which has a significant impact on the safe landing of the vehicle. Based on the traditional multi-body dynamics analysis, a friction-containing single-point collision model is introduced to simulate the dynamic discontinuity process caused by the foot-ground collision, and the landing state dynamics of the carrier in a typical landing mode is established. And constructed a finite state machine for the complete landing process of the leg landing gear carrier. Through numerical simulation calculation, the parameterization interval of the carrier landing results is divided to obtain a stable landing parameter combination, which can provide strategic reference and technical support for subsequent carrier landing control.

Key words: rocket recycling, dynamic modeling, collision, stability