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An Identification-Based Method Improving the Transparency of a Robotic Upper Limb Exoskeleton

Published online by Cambridge University Press:  03 February 2021

Dorian Verdel*
Affiliation:
Université Paris-Saclay, ENS Paris-Saclay, LURPA, 94235 Cachan, France E-mail: olivier.bruneau@ens-paris-saclay.fr Université Paris-Saclay, CIAMS, 91405 Orsay, France E-mails: simon.bastide@universite-paris-saclay.fr, nicolas.vignais@universite-paris-saclay.fr, bastien.berret@universite-paris-saclay.fr CIAMS, Université d’Orléans, 45067 Orléans, France
Simon Bastide
Affiliation:
Université Paris-Saclay, CIAMS, 91405 Orsay, France E-mails: simon.bastide@universite-paris-saclay.fr, nicolas.vignais@universite-paris-saclay.fr, bastien.berret@universite-paris-saclay.fr CIAMS, Université d’Orléans, 45067 Orléans, France
Nicolas Vignais
Affiliation:
Université Paris-Saclay, CIAMS, 91405 Orsay, France E-mails: simon.bastide@universite-paris-saclay.fr, nicolas.vignais@universite-paris-saclay.fr, bastien.berret@universite-paris-saclay.fr CIAMS, Université d’Orléans, 45067 Orléans, France
Olivier Bruneau
Affiliation:
Université Paris-Saclay, ENS Paris-Saclay, LURPA, 94235 Cachan, France E-mail: olivier.bruneau@ens-paris-saclay.fr
Bastien Berret
Affiliation:
Université Paris-Saclay, CIAMS, 91405 Orsay, France E-mails: simon.bastide@universite-paris-saclay.fr, nicolas.vignais@universite-paris-saclay.fr, bastien.berret@universite-paris-saclay.fr CIAMS, Université d’Orléans, 45067 Orléans, France Institut Universitaire de France, Paris, France
*
*Corresponding author. E-mail: dorian.verdel@ens-paris-saclay.fr
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Over the past decade, research on human–robot collaboration has grown exponentially, motivated by appealing applications to improve the daily life of patients/operators. A primary requirement in many applications is to implement highly “transparent” control laws to reduce the robot impact on human movement. This impact may be quantified through relevant motor control indices. In this paper, we show that control laws based on careful identification procedures improve transparency compared to classical closed-loop position control laws. A new performance index based on the ratio between electromyographic activity and limb acceleration is also introduced to assess the quality of human exoskeleton interaction.

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Article
Copyright
© The Author(s), 2021. Published by Cambridge University Press