Abstract
This paper presents a novel 4 degree-of-freedom Schönflies-motion parallel manipulator, which is an upgraded design of a 3 degree-of-freedom planar parallel manipulator. The manipulator consists of three identical RRPaR (R: a revolute joint, Pa: a planar parallelogram) and one RRRRR subchain. The three actuated joints, the first revolute joints, of RRPaR subchains are designed to have a common rotation axis, and the actuated joint (the second R joint) axis of the RRRRR subchain is perpendicular to the common rotation axis. This architecture contributes large rotationally-symmetric workspace and unlimited rotational capability of the end-effector. The fundamental demerit of typical parallel manipulators, limited workspace, is completely removed. In this paper, the loop-closure equations are derived. The inverse and forward kinematics and singularity analysis are discussed. An algebraic derivation of the dextrous workspace is presented.
| Original language | English |
|---|---|
| Pages (from-to) | 1595-1606 |
| Number of pages | 12 |
| Journal | Meccanica |
| Volume | 51 |
| Issue number | 7 |
| DOIs | |
| State | Published - 1 Jul 2016 |
| Externally published | Yes |
Keywords
- Co-axis
- Kinematics
- Parallel manipulator
- Pick-and-place
- Singularity
- Workspace
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