Workspace and cuspidality analysis of a 2-X planar manipulator

Abstract : This paper analyzes the workspace of a planar 2-X manip-ulator, i.e. made of two crossed four-bar mechanisms in series. This architecture has some advantages over classical 2-R manipulators such as its ability to be driven with tendons, but its kinematics is more challenging because of a variable instantaneous center of rotation of the X-mechanisms. The workspace boundaries are determined algebraically and its accessibility is analyzed. In the absence of joint limits, the workspace has regions with two and four inverse kinematic solutions. Depending on the values of its geometric parameters, the manipulator at hand may be cuspidal, i.e. it can change its posture without meeting a singularity. A necessary and sufficient condition is stated for the manipulator to be cuspidal. The effect of joint limits is analyzed and the accessibility regions are further classified according to the reachable configurations of each X-mechanism in these regions.
Liste complète des métadonnées

Cited literature [10 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01810820
Contributor : Philippe Wenger <>
Submitted on : Friday, June 8, 2018 - 11:20:43 AM
Last modification on : Tuesday, March 26, 2019 - 9:25:22 AM
Document(s) archivé(s) le : Sunday, September 9, 2018 - 2:57:45 PM

File

MederFuret_wenger_v3.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : hal-01810820, version 1

Citation

Matthieu Furet, Philippe Wenger. Workspace and cuspidality analysis of a 2-X planar manipulator. 4th IFToMM Symposium on Mechanism Design for Robotics, Sep 2018, Udine, Italy. ⟨hal-01810820⟩

Share

Metrics

Record views

261

Files downloads

115