吉林大学学报(工学版) ›› 2021, Vol. 51 ›› Issue (5): 1612-1619.doi: 10.13229/j.cnki.jdxbgxb20200501

• 车辆工程·机械工程 • 上一篇    

基于有限元的人体⁃机械手交互力计算方法

李学勇1,2,3(),赵仲秋1,2,张春松1,2,路长厚1,2,3   

  1. 1.山东大学 机械工程学院,济南 250061
    2.山东大学 高效洁净机械制造教育部重点实验室,济南 250061
    3.山东大学 机械工程国家级实验教学示范中心,济南 250061
  • 收稿日期:2020-07-04 出版日期:2021-09-01 发布日期:2021-09-16
  • 作者简介:李学勇(1974-),男,副教授,博士.研究方向:机器人.E-mail:mechsd@163.com
  • 基金资助:
    山东省重点研发计划项目(2019GGX104038);山东大学基本科研业务费专项项目(2016JC001)

Finite element based calculation method of human⁃robot interaction force

Xue-yong LI1,2,3(),Zhong-qiu ZHAO1,2,Chun-song ZHANG1,2,Chang-hou LU1,2,3   

  1. 1.School of Mechanical Engineering,Shandong University,Jinan 250061,China
    2.Key Laboratory of High Efficiency and Clean Mechanical Manufacture,Ministry of Education,Shandong University,Jinan 250061,China
    3.National Demonstration Center for Experimental Mechanical Engineering Education,Shandong University,Jinan 250061,China
  • Received:2020-07-04 Online:2021-09-01 Published:2021-09-16

摘要:

通过建立人肢体骨骼、肌肉组织与康复机器人机械手指节表面的曲面方程,对人肢体肌肉组织划分微元,通过微元的应变逐步求解康复机器人机械手的指节压力,从而实现对人机交互力的计算与分析。在简化模型仿真验证中,展现了位移量(压入量)、交互位置、人肢体软组织弹性模量、泊松比等参数对人机交互力的影响规律,位移量为5 mm时,理论计算与仿真结果的平均相对误差在10%~15%左右。仿真结果表明:本文理论可以有效计算康复机器人机械手的指节压力,能对人机交互力进行计算与评价。

关键词: 机械电子工程, 人机交互力, 仿人康复机器人, 有限元, 可变形体抓取

Abstract:

The proposed method builds surface equations of bones, muscle of human limb and robot fingers, divides finite elements of muscle tissue of human limbs, gradually obtains finger force of rehabilitation robot hand, and finally realizes the calculation and analysis of human-robot interaction force. In simulation verification of simplified model, the effects of displacement, position of interaction, elasticity modulus of human soft tissue and Poisson's ratio on human-robot interaction force are revealed, and the average relative error between theoretical calculation and simulation data varies from 10% to 15% when the displacement is 5 mm. The simulation outcomes indicate that the proposed theory is able to effectively calculate finger force of rehabilitation robot hand, calculate and evaluate human-robot interaction force.

Key words: mechatronic engineering, human-robot interaction force, humanoid rehabilitation robot, finite element, deformable object grasping

中图分类号: 

  • TP242.3

图1

指节表面方程的构建与微元的划分"

图2

机械手指节与人肢体交互"

图3

机械手与人肢体模型"

表1

二指二关节机械手计算与仿真参数"

仿真组Rx?Ry?RzE/MPauθ2/(°)h1/mm
1(20 30 47)0.5×1060302, 3, 4, 5
2(20 95 44)0.5×1060302, 3, 4, 5
3(20 30 47)1.0×1060302, 3, 4, 5
4(20 30 47)0.5×1060.2302, 3, 4, 5

图4

简化仿真模型"

图5

表1中仿真结果对比"

图6

第一组仿真结果的相对误差"

图7

二指三关节简化仿真模型"

表2

二指三关节机械手计算与仿真参数"

仿真组Rx?Ry?RzE/MPauθ1/(°)θ3/(°)h1/mm
1(20 30 41)0.5×1060.032304, 5
2(20 100 38)0.5×1060.032304, 5
3(20 30 41)1.0×1060.032304, 5
4(20 30 41)0.5×1060.232304, 5

图8

表2中第一组仿真结果对比"

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