Kinematics Performance Analysis of Bifurcation Parallel Mechanism

被引：0

作者：

Li Y. ^{[1
]}

Cai J. ^{[1
]}

Li Y. ^{[1
]}

Zheng T. ^{[2
]}

Wang J. ^{[1
]}

Qiao X. ^{[1
]}

机构：

[1] College of Mechanical Engineering, Yanshan University, Qinhuangdao

[2] College of Mechanical Engineering, Hebei University of Technology, Tianjin

来源：

Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | 2023年 / 54卷 / 04期

关键词：

characteristics of movement decoupling; movement bifurcation; parallel mechanism; screw theory; transmission performance;

D O I：

10.6041/j.issn.1000-1298.2023.04.047

中图分类号：

学科分类号：

摘要：

At present, many parallel mechanisms with motion bifurcation characteristics use single-loop mechanisms. The mechanism is complex and the configuration is monotonous. There are few known parallel mechanisms with 3T1R and 2R2T multi-modes.A branch chain with motion bifurcation characteristics was introduced into the parallel mechanism, and a motion bifurcation parallel mechanism with 3T1R + 2R2T two modes was obtained，and its degree of freedom and motion bifurcation characteristics were analyzed by using the screw theory.The results showed that when the mechanism was at the motion bifurcation point, the moving platform had five degrees of freedom. By driving different driving pairs, the mechanism can evolve into a configuration with different motion bifurcation characteristics, including three movements and one rotation, two movements and two rotations. In order to realize the reasonable switching between the two configurations, a rigid drive method was used to select a reasonable drive pair. The forward and inverse kinematics solutions of the parallel mechanism in different configurations were analyzed. It was concluded that both the forward and inverse kinematics equations can be solved analytically. The mechanism had good motion decoupling. The correctness of the forward and inverse kinematics solution was verified by ADAMS. The singularity of the mechanism was analyzed by Jacobi matrix. The results showed that there was no singularity in the two motion modes in a reasonable working range. The workspace of the organization was drawn. Based on the motion/force transfer performance method, the performance index of the mechanism was analyzed, and the performance distribution map in the workspace was drawn. The results showed that the two configurations had good motion/force transfer characteristics, and the high quality workspace was large. © 2023 Chinese Society of Agricultural Machinery. All rights reserved.

引用

页码：447 / 458

页数：11

共 20 条

[1]

TSAL C L, PARK S C, CHENG W T., Welding distortion of a thin-plate panel structure

[2]

the effect of welding sequence on panel distortion is evaluated[J], Welding Journal, 78, 5, pp. 156-165, (1999)

[3]

PIETRO F, CARLO G, ELENA N., Parallel robots that change their group of motion [C], Advances in Robot Kinematics, pp. 49-56, (2006)

[4]

SAMEH R, JACQUES M H, SAEID N, Et al., Two-mode overconstrained three-DOFs rotational-translational linear-motor-based parallel-kinematics mechanism for machine tool applications [J], International Journal of Information, Education and Research in Robotics and Artificial Intelligence, 25, pp. 461-466, (2007)

[5]

LI Qinchuan, CHEN Qiaohong, WU Chuanyu, Et al., 4 - xPxRxRxRxRyRN parallel mechanism with variable mobility [J], Chinese Journal of Mechanical Engineering, 45, 1, pp. 83-87, (2009)

[6]

ZHANG K, DAI J S, FANG Y F., Topology and constraint analysis of phase change in the metamorphic chain and its evolved mechanism [J], Journal of Mechanical Design, 132, 12, (2010)

[7]

YE Wei, FANG Yuefa, GUO Sheng, Et al., Bifurcated motion and kinematics of novel parallel mechanism [J], Journal of Mechanical Engineering, 49, 13, pp. 8-16, (2013)

[8]

LIU Wei, LIU Hongzhao, Synthesis of parallel mechanisms with 3T, 2T1R and 2R1T motion modes [J], Transactions of the Chinese Society for Agricultural Machinery, 50, 12, pp. 411-419, (2019)

[9]

SHEN Huiping, GU Xiaoyang, LI Ju, Et al., Topological coupling-reducing based design ol 3T1R parallel mechanism and kinematics perlormances analysis, Transactions ol the Chinese Society lor Agricultural Machinery, 52, 8, pp. 406-415, (2021)

[10]

ZHU Xiaorong, WU Yu, SHEN Huiping, Static stillness analysis ol 3T1R hybrid manipulator based on virtual joint method, Transactions ol the Chinese Society lor Agricultural Machinery, 52, 9, pp. 400-409, (2021)

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