Robotics: Science and Systems VI

Singularity-invariant leg rearrangements in doubly-planar Stewart-Gough platforms

J. B. Sol, F. Thomas and C. Torras

Abstract:

In general, rearranging the legs of a Stewart-Gough platform, i.e., changing the locations of its leg attachments, modifies the platform singularity locus in a rather unexpected way. Nevertheless, some leg rearrangements have been recently found to leave singularities invariant but, unfortunately, these rearrangements are only valid for Stewart-Gough platforms containing rigid components. In this work, the authors go a step further presenting singularity-invariant leg rearrangements that can be applied to any Stewart-Gough platform whose base and platform attachments are coplanar. The practical consequences of the presented theoretical results are illustrated with several examples including well-known architectures.

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Bibtex:

@INPROCEEDINGS{ Sol-RSS-10,
    AUTHOR    = {J. B. Sol AND F. Thomas AND C. Torras},
    TITLE     = {Singularity-invariant leg rearrangements in doubly-planar Stewart-Gough platforms},
    BOOKTITLE = {Proceedings of Robotics: Science and Systems},
    YEAR      = {2010},
    ADDRESS   = {Zaragoza, Spain},
    MONTH     = {June}
}