Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7179628 | Mechanism and Machine Theory | 2016 | 19 Pages |
Abstract
This paper presents a comparative study of asymmetrical spherical parallel manipulators with respect to motion/force transmission and stiffness. The manipulators adopt a center shaft to both generate a decoupled unlimited-torsion motion and support the mobile platform for high positioning accuracy, where the difference lies in the rotationally/linearly actuated limbs in-parallel. The transmission indices are defined based on the virtual coefficient between the transmission wrench and twist screws for design analysis. Comparison of the manipulators is carried out based on a multi-objective optimization approach, which aims to maximize the workspace of high transmissibility and stiffness over a regular workspace. Performance isocontours are visualized to highlight the advantages/drawbacks among the manipulator counterparts.
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Industrial and Manufacturing Engineering
Authors
Guanglei Wu, Ping Zou,