考虑含间隙关节的漂浮基空间机械臂动力学输出特性研究

doi:10.3901/JME.2019.03.099

机械工程学报 ›› 2019, Vol. 55 ›› Issue (3): 99-108.doi: 10.3901/JME.2019.03.099

考虑含间隙关节的漂浮基空间机械臂动力学输出特性研究

谷勇霞¹, 张玉玲², 赵杰亮², 阎绍泽²

1. 北京工商大学材料与机械工程学院北京 100048;
2. 清华大学机械工程系北京 100084

收稿日期:2018-04-15 修回日期:2018-11-12 出版日期:2019-02-05 发布日期:2019-02-05
通讯作者: 谷勇霞(通信作者),女,1968年出生,博士,副教授,硕士研究生导师。主要研究方向为机械动力学。E-mail:guyx@th.btbu.edu.cn
基金资助:
国家自然科学基金（11272171），摩擦学国家重点实验室自主研究课题（SKLT2014B06）资助项目。

Dynamic Characteristics of Free-floating Space Manipulator with Joint Clearance

GU Yongxia¹, ZHANG Yuling², ZHAO Jieliang², YAN Shaoze²

1. School of Material and Mechanical Engineering, Beijing Technology and Business University, Beijing 100048;
2. Department of Mechanical Engineering, Tsinghua University, Beijing 100084

Received:2018-04-15 Revised:2018-11-12 Online:2019-02-05 Published:2019-02-05

摘要/Abstract

摘要： 研究关节间隙对漂浮基空间机械臂动力学特性的影响对设计空间站机械臂具有重要意义。采用Lankarani-Nikravesh接触力表达式建立了考虑摩擦的含间隙关节模型；应用Lagrange方程和含间隙关节模型建立了含间隙的漂浮基空间机械臂动力学模型。数值模拟分析了间隙关节数量和不同间隙尺寸对漂浮基空间机械臂动力学输出特性的影响，并定量分析了间隙对漂浮基空间机械臂动力学输出的影响程度。结果表明，两个含间隙关节的耦合作用导致关节接触碰撞力剧烈变化，引起漂浮基空间机械臂的动力学输出更加剧烈；关节的间隙尺寸值越大，漂浮基空间机械臂动力学输出的波动幅值越大，但波动频率会随着间隙值的增大而减小，降低了空间机械臂的运动精度。该研究可为解决多个含间隙关节的漂浮基空间机械臂的高精度轨迹控制问题提供重要的理论依据。

关键词: 动力学特性, 间隙尺寸, 间隙数量, 漂浮基空间机械臂

Abstract: The influence of joint clearance on the dynamic characteristics of the free-floating space manipulator is of great significance to the design of the space station manipulator. The joint model with clearance and friction is established by the Lankarani-Nikravesh contact force expression and the dynamic model of free-floating space manipulator with clearance is derived by using the Lagrange equation. The dynamic output characteristics is analyzed by numerical simulation in consideration of the number of joints with clearance and different clearance sizes and the influence of the clearance on the dynamic output characteristics of the free-floating manipulator is studied quantitatively. The results show that the coupling effect of the double joints with clearance leads to the dramatic change of the contact forces, which causes the dynamic output of the free-floating space manipulator to be more intense. The dynamic output of the free-floating space manipulator fluctuates more violently with the larger clearance size, but the fluctuation frequency decreases, which seriously reduces the motion accuracy of space manipulator. This study provides the important basis for the high precision trajectory control of free-floating space manipulator with multiple joints with clearance.

Key words: clearance size, dynamic characteristics, free-floating space manipulator, number of clearance joints

中图分类号:

TH113

谷勇霞, 张玉玲, 赵杰亮, 阎绍泽. 考虑含间隙关节的漂浮基空间机械臂动力学输出特性研究[J]. 机械工程学报, 2019, 55(3): 99-108.

GU Yongxia, ZHANG Yuling, ZHAO Jieliang, YAN Shaoze. Dynamic Characteristics of Free-floating Space Manipulator with Joint Clearance[J]. Journal of Mechanical Engineering, 2019, 55(3): 99-108.

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考虑含间隙关节的漂浮基空间机械臂动力学输出特性研究

Dynamic Characteristics of Free-floating Space Manipulator with Joint Clearance

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