摘要
针对手持振动工具对人体的负面影响和现有减振措施不足,提出一种轻量化、高舒适性的携行式上肢抗振外骨骼作为新型个体防护装备,并对外骨骼核心部件减振器进行参数设计,提高了减振性能。利用直角坐标法求解机构的运动方程,根据拉格朗日原理建立人机耦合系统运动微分方程,分析得到影响抗振外骨骼减振性能的关键参数。基于人机耦合力学模型和外骨骼初始样机参数,使用Minitab以标准正交表L_(27)(3^(13))设计考虑交互作用的5因素3水平正交仿真试验。ADAMS仿真试验结果表明:各因素及其部分交互项对合力F的影响显著性排序为l_(2)/l_(1)>l_(2)/l_(1)×c_(1)>l_(2)/l_(1)×c_(2)>c_(2)>c_(1)>c_(1)×c_(2)>k_(2)>k_(1);减振器安装位置l_(2)/l_(1)是影响减振性能的主要因素;结合交互作用分析二元图,试验范围内因素最佳水平组合为l_(2)/l_(1)(1)k_(1)(1)c_(1)(3)k_(2)(1)c_(2)(3)。最佳水平组合下外骨骼达到较好的减振效果。
In view of the negative impact of hand-held vibration tools on the human body and the lack of existing vibration reduction measures,a lightweight and comfortable portable upper extremity anti-vibration exoskeleton was proposed as new personal protective equipment.The structural parameter of its core component damper is designed to improve the vibration reduction performance.The rectangular coordinate method is used to build and solve the equation for the motion of the mechanism.According to the Lagrange principle,the differential equation of motion of the man-machine coupled system is established,and the key parameters that affect the anti-vibration exoskeleton damping performance are analyzed.Based on the mechanical model of human-machine coupling and the initial prototype parameters of exoskeleton,the standard orthogonal table L_(27)(3^(13))is selected by Minitab to design 5-factor 3-level orthogonal simulation test,which investigates the interaction between factors.The results of ADAMS simulation show that the influence significant order of the factors and the interaction terms on force F is l_(2)/l_(1)>l_(2)/l_(1)×c_(1)>l_(2)/l_(1)×c_(2)>c_(2)>c_(1)>c_(1)×c_(2)>k_(2)>k_(1).The installation position l_(2)/l_(1) of the shock absorber is the main factor affecting the shock absorption performance.The optimal level combination of factors within the test range is l_(2)/l_(1)(1)k_(1)(1)c_(1)(3)k_(2)(1)c_(2)(3).Under the optimal level combination,the exoskeleton achieves a better vibration reduction effect.
作者
陈俞鹏
王海波
吴小笛
CHEN Yupeng;WANG Haibo;WU Xiaodi(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China;Technology and Equipment of Rail Transit Operation and Maintenance Key Laboratory of Sichuan Province,Southwest Jiaotong University,Chengdu 610031,China)
出处
《机械科学与技术》
CSCD
北大核心
2021年第12期1805-1812,共8页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(51905451)。
关键词
减振器参数设计
人机耦合力学模型
正交仿真试验
交互作用
抗振外骨骼
damper parameter design
man-machine coupled mechanical model
orthogonal simulation test
interaction
anti-vibration exoskeleton
