Kinematics and Performance Analysis of 2R2T Parallel Manipulator with Partially Decoupled Motion

被引：0
|
作者：
Ye W. [1 ]
Li Q. [1 ]
Zhang K. [2 ]
机构：
[1] Faculty of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou
[2] School of Engineering and Material Science, Queen Mary University of London, London
来源：
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | 2019年 / 50卷 / 01期
关键词：
Dimensional optimization; Lie Group theory; Mobility; Parallel mechanism; Workspace;
D O I：
10.6041/j.issn.1000-1298.2019.01.043
中图分类号：
学科分类号：
摘要：
A novel parallel manipulator with two rotations and two translations was proposed. The moving platform of the parallel manipulator was connected to the fixed base through four kinematic limbs. Four prismatic joints can be used as actuations to fully control the motion of manipulator. The mobility and motion characteristic of the manipulator were analyzed by using Lie Group theory. Position model of the parallel manipulator was established. Inverse and forward position solutions were analyzed. It was demonstrated that the analytical expressions can be obtained for the inverse and forward position solutions. Partially decoupled motion characteristic of the manipulator was analyzed. Position of the moving platform can be determined by two limbs. Singularity analysis was conducted based on Jacobian matrix. Singular configurations, including inverse kinematic singularity, forward kinematic singularity and combined singularity were analyzed. Workspace and singularity curves were determined. It was found that the singularities located near the boundary of the workspace and the parallel manipulator had relatively high rotational capability. The rotational ranges in two directions were -44°~60° and -35°~52°, respectively. Performance analysis was carried out by using the method of motion/force transmission. Performance distribution over the orientation workspace was sketched. Global performance index was used in optimal design of the manipulator. The proposed parallel manipulator can be used in many fields such as five axis machine and motion simulator. © 2019, Chinese Society of Agricultural Machinery. All right reserved.
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页码：374 / 382
页数：8
相关论文
共 27 条
  • [1] Huang Z., Li Q.C., General methodology for type synthesis of symmetrical lower-mobility parallel manipulators and several novel manipulators, The International Journal of Robotics Research, 21, 2, pp. 131-145, (2002)
  • [2] Li Q.C., Herve J.M., 1T2R parallel mechanisms without parasitic motion, IEEE Transactions on Robotics, 26, 3, pp. 401-410, (2010)
  • [3] Fang Y., Tsai L.W., Structure synthesis of a class of 4-DOF and 5-DOF parallel manipulators with identical limb structures, The International Journal of Robotics Research, 21, 9, pp. 799-810, (2002)
  • [4] Gao F., Li W., Zhao X., Et al., New kinematic structures for 2-, 3-, 4-, and 5-DOF parallel manipulator designs, Mechanism and Machine Theory, 37, 11, pp. 1395-1411, (2002)
  • [5] Yang T., Liu A., Shen H., Et al., Topology Design of Robot Mechanisms, (2018)
  • [6] Kong X., Gosselin C., Type Synthesis of Parallel Mechanisms, (2007)
  • [7] Shen H., Zhang Z., Yang T., Et al., Structural coupling-reducing design and kinematic analysis of 3T1R parallel mechanism, Transactions of the Chinese Society for Agricultural Machinery, 48, 10, pp. 380-389, (2017)
  • [8] Zhao Y., Liang B., Cao Y., Et al., 3-PRRR translational parallel mechanism with constant Jacobian matrix and its transfer performance analysis, Transactions of the Chinese Society for Agricultural Machinery, 48, 1, pp. 333-338, (2017)
  • [9] Liu J., Ma L., Xu Z., Et al., Kinematical analysis of vibrating screen on a kind of 2T-2R parallel mechanism, Transactions of the Chinese Society for Agricultural Machinery, 39, 2, pp. 59-62, (2008)
  • [10] Kumar N., Piccin O., Bayle B., A task-based type synthesis of novel 2T2R parallel mechanisms, Mechanism and Machine Theory, 77, pp. 59-72, (2014)
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