用于月球探测器软着陆机构的磁流变缓冲器设计

发布时间：2018-02-20 01:56

本文关键词： 磁流变缓冲器磁流变液软着陆磁场分析　出处：《北京交通大学》2016年硕士论文　论文类型：学位论文

【摘要】：磁流变缓冲器是利用磁流变液的流变特性而开发的一种新型缓冲装置,在航空航天领域具有一定的应用前景。结合月球面探测器对缓冲器高可靠性的要求及磁流变液缓冲器结构设计的理论基础,本文提出了一种单出杆混合模式的磁流变液缓冲器。本磁流变缓冲器内部结构采用非导磁缸筒与导磁缸筒交替固定衔接方式,实现库伦阻尼力阶梯状替增的方式,从而实现冲击作用下,磁流变缓冲器粘性阻尼力与库伦阻尼力的阻尼互补,且根据“等功恒力”的设计思想,保证恒定阻尼力的输出。且该磁流变缓冲器缩比原理样机采用恒定直流源直接供电模式,删减了繁琐的控制模块,具有结构简单、稳定性高等优点。基于技术要求,设计磁流变缓冲器几何尺寸的1/4倍缩比原理样机。根据流体力学理论计算,并利用有限元工具进行磁场分析,实现磁流变缓冲器缩比原理样机的结构设计。针对磁场分析的最优模型参数,设计磁流变缓冲装置,绘制零件结构图,并进行加工组装。针对磁流变缓冲器的应用环境,试验研究磁流变液缓冲器的缓冲性能,主要分析其静力学性能和冲击响应性能。通过电子万能试验机对磁流变液缓冲器进行静力分析,其静载承压能力大于1.83kN；搭建冲击测试平台,试验研究磁流变液缓冲器的冲击响应状态,实验表明该磁流变液缓冲器具有优良的缓冲性能。
[Abstract]:The magnetorheological buffer is a new type of buffer device developed by using the rheological characteristics of the magnetorheological fluid. It has a certain application prospect in the field of aeronautics and spaceflight, combining with the requirement of high reliability of the lunar spherical detector and the theoretical basis of the structure design of the magnetorheological fluid buffer. In this paper, a single rod mixed magnetorheological fluid buffer is proposed. The internal structure of the magnetorheological buffer adopts the alternating fixed connection between the non-magnetic cylinder and the magnetic cylinder to realize the Coulomb damping force step by step superposition. Thus, the damping of the viscous damping force and the Coulomb damping force of the magnetorheological buffer is complementary under the impact, and according to the design idea of "equal power constant force", The output of constant damping force is guaranteed, and the prototype of the principle of the magneto-rheological buffer adopts the direct power supply mode of constant DC source, which reduces the tedious control module, and has the advantages of simple structure, high stability and so on. A prototype of the principle of 1/4 times shrinkage ratio for the geometry size of Mr buffer was designed. The magnetic field analysis was carried out by using finite element method and the hydrodynamics theory was used to calculate the model. According to the optimal model parameters of magnetic field analysis, the magneto-rheological buffer device is designed, the part structure diagram is drawn, and the assembly is carried out. In view of the application environment of the magnetorheological buffer, The buffer performance of magnetorheological fluid buffer is studied, and its statics and shock response are analyzed. The static analysis of MRF buffer is carried out by means of electronic universal testing machine. The static load bearing capacity is greater than 1.83 kN. the shock response state of the magnetorheological fluid buffer is studied by setting up an impact test platform. The experiment shows that the MRF buffer has excellent buffering performance.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：V476.3

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