双臂协调机械手动力学建模的新方法

doi:10.13700/j.bh.1001-5965.2015.0555

北京航空航天大学学报 ›› 2016, Vol. 42 ›› Issue (9): 1903-1910.doi: 10.13700/j.bh.1001-5965.2015.0555

双臂协调机械手动力学建模的新方法

刘佳, 刘荣

北京航空航天大学机械工程及自动化学院机器人研究所, 北京 100083

收稿日期:2015-08-31 出版日期:2016-09-20 发布日期:2016-02-18
通讯作者: 刘荣,Tel.:010-82314554,E-mail:rliu@buaa.edu.cn E-mail:rliu@buaa.edu.cn
作者简介:刘佳,男,博士研究生。主要研究方向:工业机器人动力学及控制。Tel.:010-82314554,E-mail:bhwxcd2013@sina.com;刘荣,男,博士,教授,博士生导师。主要研究方向:爬壁机器人、工业机器人。Tel.:010-82314554,E-mail:rliu@buaa.edu.cn

New approach for dynamics modeling of dual-arm cooperating manipulators

LIU Jia, LIU Rong

Robotics Institute, School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

Received:2015-08-31 Online:2016-09-20 Published:2016-02-18

摘要/Abstract

摘要： 由于某种既定任务而产生的约束关系的存在，使得双臂协调机械手的动力学特性表现出高度的非线性和耦合性。因此，利用传统的拉格朗日方程建立其动力学模型显得困难重重。针对平面双臂协调搬运机械手的动力学建模问题，基于传统的拉格朗日方程给出并证明了平面多杆机械手动力学方程的一般表达式。然后利用上述表达式，并基于分析力学界著名的Udwadia-Kalaba方程的建模思想，获得双臂协调机械手在预定轨迹下各杆所需附加力矩的解析表达式及系统的动力学方程，克服了传统拉格朗日方程需借助拉格朗日乘子获得动力学方程的缺点。双臂协调机械手的关节角变化规律和被搬运物体轨迹的数值仿真结果证明所建立的动力学方程符合实际情况。

关键词: 平面n杆机械手, 双臂协调机械手, 约束, 动力学建模, Udwadia-Kalaba方程

Abstract: High nonlinearity and coupling were shown from the dynamic characteristics of dual-arm cooperating manipulators because of the constrained relationship brought by desired task. Therefore, it was difficult to establish dynamical equation with traditional Lagrange equation. Aimed at the dynamics modeling of dual-arm cooperating planar manipulators, a generalized dynamical equation of multi-link planar manipulators was established and proved with traditional Lagrange equation. Then the additional torque and dynamical equation of dual-arm cooperating planar manipulators subject to some desired trajectory were acquired based on the famous Udwadia-Kalaba equation in analytical mechanics field and the above-mentioned generalized dynamical equation of multi-link planar manipulators. The new approach overcomes the disadvantage of obtaining dynamical equation from traditional Lagrange equation by Lagrange multiplier. The stimulation results of the varying law of the joint angles and the motion path of the bar prove that the dynamical equation established by this method conforms to the matter of fact.

Key words: n-link planar manipulators, dual-arm cooperating manipulators, constraints, dynamics modeling, Udwadia-Kalaba equation

中图分类号:

TH113

刘佳, 刘荣. 双臂协调机械手动力学建模的新方法[J]. 北京航空航天大学学报, 2016, 42(9): 1903-1910.

LIU Jia, LIU Rong. New approach for dynamics modeling of dual-arm cooperating manipulators[J]. JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2016, 42(9): 1903-1910.

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双臂协调机械手动力学建模的新方法

New approach for dynamics modeling of dual-arm cooperating manipulators

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