Synthesis and Analysis of a Group of 3-Degree-of-Freedom Partially Decoupled Parallel Manipulators

Author:

Jin Qiong1,Yang Ting-Li2

Affiliation:

1. Department of Mechanical Engineering, Southeast University, Nanjing 210096, P. R. China

2. SINOPIC Jinling Petrochemical Corp., Nanjing 210037, P. R. China

Abstract

The kinematics decoupling for parallel manipulators is studied in this paper. Based on the topological structure characteristics of parallel mechanisms, the internal relationship between kinematics decoupling and basic kinematics chains is revealed, and the basic principle for structural synthesis of topologically decoupled mechanisms is put forward. Using this theory, a group of 3 degree-of-freedom (DOF) partially decoupled manipulators are synthesized. The expected kinematic outputs of these manipulators are 1-DOF translation and 2-DOF rotation, and motions along or about undesired directions do not exist. The kinematics analysis of a newly synthesized manipulator is discussed and the results indicate that the decoupling property of these architectures makes possible reaching real time control and path planning of parallel manipulators.

Publisher

ASME International

Subject

Computer Graphics and Computer-Aided Design,Computer Science Applications,Mechanical Engineering,Mechanics of Materials

Reference30 articles.

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3. Herve, J. M., 1995, “Design of Parallel Manipulators via the Displacement Group,” Proceedings of the Ninth World Congress on Theory of Machines and Mechanisms, Milland, pp. 2079–2082.

4. Tsai, L. W., Walsh, G. C., and Stamper, R., 1996, “Kinematics of a Novel Three DOF Translational Platform,” Proceedings of the 1996 IEEE International Conf. on Robotics and Automation, pp. 3446–3451, Minneapolis, MN.

5. Tsai, L. W., and Joshi, S., 2000, “Kinematics and Optimization of a Spatial 3-UPU Parallel Manipulator,” ASME J. Mech. Des., 122(4), pp. 439–446.

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