On-line force capability evaluation based on efficient polytope vertex search - Inria - Institut national de recherche en sciences et technologies du numérique Accéder directement au contenu
Pré-Publication, Document De Travail Année : 2020

On-line force capability evaluation based on efficient polytope vertex search

Résumé

Ellipsoid-based manipulability measures are often used to characterize the force/velocity task-space capabilities of robots. While computationally simple, this approach largely approximate and underestimate the true capabilities. Force/velocity polytopes appear to be a more appropriate representation to characterize robot's task-space capabilities. However, due to the computational complexity of the associated vertex search problem, the polytope approach is mostly restricted to offline use, e.g. as a tool aiding robot mechanical design, robot placement in work-space and offline trajectory planning. In this paper, a novel on-line polytope vertex search algorithm is proposed. It exploits the parallelotop geometry of actuator constraints. The proposed algorithm significantly reduces the complexity and computation time of the vertex search problem in comparison to commonly used algorithms. In order to highlight the on-line capability of the proposed algorithm and its potential for robot control, a challenging experiment with two collaborating Franka Emika Panda robots, carrying a load of 12 kilograms, is proposed. In this experiment, the load distribution is adapted on-line, as a function of the configuration dependant task-space force capability of each robot, in order to avoid, as much as possible, the saturation of their capacity.
Fichier principal
Vignette du fichier
skuric_padois_daney_submitted_nov_2020.pdf (2.14 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-02993408 , version 1 (10-11-2020)
hal-02993408 , version 2 (26-03-2021)

Identifiants

Citer

Antun Skuric, Vincent Padois, David Daney. On-line force capability evaluation based on efficient polytope vertex search. 2020. ⟨hal-02993408v1⟩
233 Consultations
186 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More