The goal of this paper is to solve the problems of large volume, slow dynamic response and poor intelligent controllability of traditional gait rehabilitation training equipment by using the characteristic that the shear yield strength of magnetorheological fluid changes with the applied magnetic field strength. Based on the extended Bingham model, the main structural parameters of the magnetorheological fluid damper and its output force were simulated and optimized by using scientific computing software, and the three-dimensional modeling of the damper was carried out after the size was determined. On this basis and according to the design and use requirements of the damper, the finite element analysis software was used for force analysis, strength check and topology optimization of the main force components. Finally, a micro magnetorheological fluid damper suitable for wearable rehabilitation training system was designed, which has reference value for the design of lightweight, portable and intelligent rehabilitation training equipment.
为解决传统步态康复训练设备体积大、动力响应慢、智能可控性差的问题，本文利用磁流变液剪切屈服强度随施加的磁场强度变化而变化的特性，运用科学计算软件，基于扩充的宾汉姆（Bingham）模型，对磁流变液阻尼器主要结构参数及其输出的作用力进行仿真优化研究，并对尺寸确定后的阻尼器进行三维建模，在此基础上根据阻尼器的设计使用要求，利用有限元分析软件对主要受力部件进行受力分析、强度校核以及拓扑优化，最终设计了一款适用于可穿戴康复训练系统的微型磁流变液阻尼器，对轻量化、便携化、智能化的康复训练设备的设计具有参考价值。.
Keywords: Extended Bingham model; Finite element analysis; Magnetorheological fluid damper; Topology optimization; Wearable rehabilitation equipment.