As shown in this paper, when designing parallel manipulators for tasks involving less than six degrees of freedom, the topology can be laid out by resorting to qualitative reasoning. More specifically, the paper focuses on cases whereby the manipulation tasks pertain to displacements with the algebraic structure of a group. Besides the well-known planar and spherical displacements, this is the case of displacements involving: rotation about a given axis and translation in the direction of the same axis (cylindrical subgroup); translation in two and three dimensions (two- and three-dimensional translation subgroups); three independent translations and rotation about an axis of fixed direction, what is known as the Scho¨nflies subgroup; and similar to the Scho¨nflies subgroup, but with the rotation and the translation in the direction of the axis of rotation replaced by a screw displacement. For completeness, the fundamental concepts of motion representation and groups of displacements, as pertaining to rigid bodies, are first recalled. Finally, the concept of Π-joint, introduced elsewhere, is generalized to two and three degrees of freedom, thereby ending up with the -and the -joints, respectively.
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July 2004
Technical Papers
The Qualitative Synthesis of Parallel Manipulators
Jorge Angeles
Jorge Angeles
Department of Mechanical Engineering & Centre for Intelligent Machines, McGill University, Montreal
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Jorge Angeles
Department of Mechanical Engineering & Centre for Intelligent Machines, McGill University, Montreal
Contributed by the Mechanisms and Robotics Committee for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received January 2003; revised July 2003. Associate Editor: G. R. Pennock.
J. Mech. Des. Jul 2004, 126(4): 617-624 (8 pages)
Published Online: August 12, 2004
Article history
Received:
January 1, 2003
Revised:
July 1, 2003
Online:
August 12, 2004
Citation
Angeles, J. (August 12, 2004). "The Qualitative Synthesis of Parallel Manipulators ." ASME. J. Mech. Des. July 2004; 126(4): 617–624. https://doi.org/10.1115/1.1667955
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