Enlarging Parallel Robot Workspace through Type-2 Singularity Crossing
Résumé
In order to increase the reachable workspace of parallel robots, a promising solution consists in the definition of optimal trajectories that ensure the non degeneracy of the dynamic model in the Type 2 (or parallel) singularity. However, this assumes that the control law can perfectly track the desired trajectory, which is impossible due to modelling errors. This paper proposes a robust multi-model approach allowing parallel robots to cross Type 2 singularities. The main idea is to shift near singularities to a simplified dynamic model that can never degenerate. The proposed control law is validated experimentally through a Five-bar planar parallel mechanism.
Domaines
Robotique [cs.RO]Origine | Fichiers produits par l'(les) auteur(s) |
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