中国机械工程 ›› 2026, Vol. 37 ›› Issue (3): 586-594.DOI: 10.3969/j.issn.1004-132X.2026.03.008
• 机械基础工程 • 上一篇
收稿日期:2025-03-19
出版日期:2026-03-25
发布日期:2026-04-08
通讯作者:
邓昱
作者简介:陈修龙,男,1976年生,教授、博士研究生导师。研究方向为机械系统动力学、机器人机构学理论与应用。E-mail:cxldy99@163.com基金资助:
CHEN Xiulong(
), SUN Chuijun, DENG Yu(
)
Received:2025-03-19
Online:2026-03-25
Published:2026-04-08
Contact:
DENG Yu
摘要:
为了精确预测空间并联机构在运动副间隙与构件弹性共同作用下的动力学特性,以3-RRPaR空间并联机构为研究对象,建立了含间隙机构刚柔耦合动力学模型,并采用四阶龙格-库塔法和广义-
中图分类号:
陈修龙, 孙垂军, 邓昱. 含间隙空间并联机构刚柔耦合动力学分析与试验[J]. 中国机械工程, 2026, 37(3): 586-594.
CHEN Xiulong, SUN Chuijun, DENG Yu. Rigid-Flexible Coupling Dynamics Analyses and Experiments of Spatial Parallel Mechanisms with Clearances[J]. China Mechanical Engineering, 2026, 37(3): 586-594.
| 构件 | 参数 | 值 |
|---|---|---|
| 主动臂 | li1长度/mm | 255 |
| Pa支链短杆 | lsh长度/mm | 105 |
| 末端执行器 | x4距离/mm | 60 |
| y5距离/mm | 80 | |
| Pa支链长杆 | ls长度/mm | 640 |
| 机架 | x1距离/mm | 100 |
| y2距离/mm | 720 | |
| z3距离/mm | 600 |
表1 3-RRPaR空间并联机构结构参数
Tab.1 Structural parameters of 3-RRPaR spatial parallel mechanism
| 构件 | 参数 | 值 |
|---|---|---|
| 主动臂 | li1长度/mm | 255 |
| Pa支链短杆 | lsh长度/mm | 105 |
| 末端执行器 | x4距离/mm | 60 |
| y5距离/mm | 80 | |
| Pa支链长杆 | ls长度/mm | 640 |
| 机架 | x1距离/mm | 100 |
| y2距离/mm | 720 | |
| z3距离/mm | 600 |
| 参数 | 数值 | 参数 | 数值 |
|---|---|---|---|
| 修正系数 | 5 | 泊松比 | 0.3 |
| 恢复系数 | 0.9 | 滑动摩擦系数cf | 0.05 |
| 轴体半径 | 0.014 | 轴套半径 | 0.015 |
| 弹性模量 | 207 | 极限速度 | 0.0001, 0.000 001 |
表2 含间隙3-RRPaR空间并联机构间隙参数
Tab.2 Gap parameters of 3-RRPaR spatial parallel mechanism with clearance
| 参数 | 数值 | 参数 | 数值 |
|---|---|---|---|
| 修正系数 | 5 | 泊松比 | 0.3 |
| 恢复系数 | 0.9 | 滑动摩擦系数cf | 0.05 |
| 轴体半径 | 0.014 | 轴套半径 | 0.015 |
| 弹性模量 | 207 | 极限速度 | 0.0001, 0.000 001 |
| 参数 | 数值 | 参数 | 数值 |
|---|---|---|---|
| 从动臂长杆横截面积 | 16×16 | 从动臂长杆弹性模量 | 116 |
| 从动臂长杆密度 | 1700 | 谱半径 | 0.7 |
| 允许误差 | 10-7 | 步长 | 0.001 |
表3 含间隙3-RRPaR空间并联机构柔性构件参数
Tab.3 Flexible component parameters of 3-RRPaR spatial parallel mechanism with clearance
| 参数 | 数值 | 参数 | 数值 |
|---|---|---|---|
| 从动臂长杆横截面积 | 16×16 | 从动臂长杆弹性模量 | 116 |
| 从动臂长杆密度 | 1700 | 谱半径 | 0.7 |
| 允许误差 | 10-7 | 步长 | 0.001 |
图5 含间隙刚体与含间隙刚柔耦合动力学模型动力学响应对比图(c=0.5 mm)
Fig.5 Comparison of dynamic response of rigid body with clearances and rigid-flexible coupling dynamic model with clearances (c=0.5 mm)
图6 不同间隙下刚柔耦合动力学模型动力学响应对比图 (c1=0.5 mm,c2=0.1 mm)
Fig.6 Comparison of dynamic response of rigid-flexible coupling dynamic model under different clearances (c1=0.5 mm, c2=0.1 mm)
| 运动副元素 | 内径/mm | 外径/mm | 长度/mm | 材料 |
|---|---|---|---|---|
| 轴套 | 15 | 24 | 50 | 铝合金 |
| 间隙轴销 | 14/14.8 | 98 | 钢 |
表4 含间隙转动副参数
Tab.4 Parameters of revolute joint with clearance
| 运动副元素 | 内径/mm | 外径/mm | 长度/mm | 材料 |
|---|---|---|---|---|
| 轴套 | 15 | 24 | 50 | 铝合金 |
| 间隙轴销 | 14/14.8 | 98 | 钢 |
| 轨迹Ⅰ/m | 轨迹Ⅱ/m |
|---|---|
表5 3-RRPaR空间并联机构试验运动轨迹
Tab.5 The test trajectory of 3-RRPaR spatial parallel mechanism
| 轨迹Ⅰ/m | 轨迹Ⅱ/m |
|---|---|
图8 末端执行器加速度响应的试验结果与动力学模型计算结果对比(c1=0.5 mm, c2=0.1 mm)
Fig.8 Comparison of the experimental results of the acceleration response of the end effector with the calculation results of the dynamic model (c1=0.5 mm, c2=0.1 mm)
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