Analysis and multi-objective optimization for buffer performance of heavy landing airbags

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (24) : 91-98.

ZHANG Pengfei1,2,WEI Jianzheng1，CHEN Xueyan1，TAN Huifeng1，ZHU Meifang3

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Abstract

Buffering technology is one of the key technologies for spacecraft landing and recovery.It is of great significance to study reasonable reduction of spacecraft overload to the safety of human body and its internal equipment.Firstly, the validity of numerical simulation method was verified by comparing the results from the control volume with the testing of literature.Then, the buffering process of six combined airbags landing system was simulated for a heavy load module.The effects of the initial internal pressure, the open timing, and the area of the venting holes of external airbags on the buffering characteristics were further studied by single parameter variation.The criteria for evaluating the collision or rebound of the module were proposed.The sample points for simulation were selected by the optimal Latin hypercube design method in order to optimize the maximum overload and the specific absorption energy of the airbag landing system.The agent model of neural network was constructed according to the buffering characteristics.Finally, the initial parameters of the airbags were optimized by the multi-objective genetic algorithm.The results show that the maximum overload optimized reduces by 17.717%, and the module with the heavy load does not rebound.

Key words

heavy landing airbags / specific absorption energy / collision / overload / buffering / multi-objective optimization

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ZHANG Pengfei1,2,WEI Jianzheng1，CHEN Xueyan1，TAN Huifeng1，ZHU Meifang3. Analysis and multi-objective optimization for buffer performance of heavy landing airbags[J]. Journal of Vibration and Shock, 2020, 39(24): 91-98

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