Forward Kinematics and Singularity Analyses of an Uncoupled Parallel Manipulator by Algebraic Screw Theory

Jaime Gallardo-Alvarado, Mario A. Garcia-Murillo, Luis A. Alcaraz-Caracheo, Felipe J. Torres, X. Yamile Sandoval-Castro

    Research output: Contribution to journalArticlepeer-review

    Abstract

    In this contribution, the Jacobian analysis of a four-legged six-degrees-of-freedom decoupled parallel manipulator is carried out through the screw theory. As an intermediate step, for the sake of completeness the inverse/forward displacement analysis as well as the computation of the workspace of the robot are achieved by taking advantage of the decoupled orientation and position of the moving platform. Afterward, the input/output equation of velocity of the parallel robot is obtained by harnessing of the properties of reciprocal screw systems. Once the Jacobian matrices are identified and investigated, the analysis of singularities for the robot manipulator emerges as a natural application of the Jacobian analysis. Numerical examples are included with the purpose to show the practicality and versatility of the method of kinematic analysis. Furthermore, the numerical results obtained by means of the theory of screws are successfully verified with the aid of commercially available software like ADAMS.

    Original languageEnglish
    Pages (from-to)4513-4522
    Number of pages10
    JournalIEEE Access
    Volume10
    DOIs
    StatePublished - 2022

    Keywords

    • Kinematics
    • Parallel robot
    • Screw theory
    • Singular posture
    • Uncoupled kinematics

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