MR damping design of the drive joints of the lunar-based extravehicular spacesuit booster mechanism  

月基舱外航天服助力机构传动关节磁流变阻尼设计

作　　者：Lü Hongzhan Yang Hai Jiang Yu 吕宏展;杨海;江宇(东华大学机械工程学院,上海201620)

机构地区：[1]College of Mechanical Engineering,Donghua University,Shanghai 201620,China

出　　处：《Journal of Southeast University(English Edition)》2024年第4期410-416,共7页东南大学学报（英文版）

基　　金：The Natural Science Foundation of Shanghai(No.20ZR1401300).

摘　　要：Considering the special walking behavior of astronauts on the lunar surface,to reduce the impact on their bones and improve safety during extravehicular operations and walking,a magnetorheological(MR)damping mechanism of power assisted transmission joint used in a new type spacesuit is proposed.In order to improve the damping performance of the MR damper,the influence of the damper s structural parameters on both the output and dynamic adjustable range of the damping torque is examined.According to the theoretical mechanical model,the output damping torque is calculated,the finite element method is used to conduct numerical tests.At the same time,the structural parameters of the damper are optimized by the response surface methods.The results indicate that the simulated torque aligns with the theoretically designed torque,and the damping characteristics of the optimized structure are effectively improved by the response surface method.Compared with the initial structure,the damping torque is increased by 10.8%,and the dynamic adjustable range is expanded by 52.9%.针对航天员在月表工作时的特殊行走行为,为了减少航天员舱外作业及行走时对身体骨骼造成的冲击,提高航天员月基舱外作业的安全性,提出了一种应用于新型航天服的助力装置传动关节磁流变阻尼机构.为了提高磁流变阻尼器的阻尼性能,研究阻尼器结构参数对磁流场中阻尼力矩的输出和动态调节范围的影响,根据理论力学模型,计算输出阻尼力矩,并采用有限元方法进行数值试验;同时,采用响应面法,对阻尼器结构参数进行优化.结果表明:仿真力矩达到了设计的理论力矩,通过响应面优化后的结构,其阻尼特性得到有效提升;与初始结构相比,阻尼力矩提高了10.8%,动态调节范围增大了52.9%.

关 键 词：extravehicular spacesuit MAGNETORHEOLOGICAL flexible transmission damping characteristics 

分 类 号：V444.3[航空宇航科学与技术—飞行器设计]