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Kinematics analysis and singularities of novel decoupled parallel manipulators with simplified architecture

Published online by Cambridge University Press:  17 November 2015

Raffaele Di Gregorio
Raffaele Di Gregorio*
Affiliation:
Department of Engineering, University of Ferrara, Via Saragat 1, 44122 Ferrara, Italy
*
*Corresponding author. E-mail: [email protected]
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Summary

Parallel manipulators (PMs) with decoupled kinematics can be obtained by combining a translational PM (TPM) with a spherical PM (SPM) either in multiplatform architectures or in integrated more-complex architectures. Some of the latter type are inspired by the 6–4 fully parallel manipulator (6–4 FPM), whereas others of the same type are deduced by suitably combining TPMs' limbs and SPMs' limbs into more cumbersome limbs which contain more than one actuated joint. The decoupled PMs (DPMs) presented here pursue an intermediate concept between the last two which keeps all the actuators on or near to the base in a simplified architecture with only three limbs. These features preserve the lightness of the mobile masses, together with the associated good-dynamic performances, and reduce the limitations on the workspace due to the eliminated limbs and to possible limb interferences. The finite and instantaneous kinematics of the proposed DPMs is studied, thus proving the practical implementation of the proposal.

Keywords

Parallel manipulatorsDecoupled kinematicsMobility analysisSingularity locus
Type
Articles
Information
Robotica , Volume 35 , Issue 4 , April 2017 , pp. 961 - 979
Copyright
Copyright © Cambridge University Press 2015 

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