Title
A variable admittance control strategy for stable physical human–robot interaction
Abstract
AbstractAdmittance control allows a desired dynamic behavior to be reproduced on a non-backdrivable manipulator and it has been widely used for interaction control and, in particular, for human–robot collaboration. Nevertheless, stability problems arise when the environment (e.g. the human) the robot is interacting with becomes too stiff. In this paper, we investigate the stability issues related to a change of stiffness of the human arm during the interaction with an admittance-controlled robot. We propose a novel method for detecting the rise of instability and a passivity-preserving strategy for restoring a stable behavior. The results of the paper are validated on two robotic setups and with 50 users performing two tasks that emulate industrial operations.
Year
DOI
Venue
2019
10.1177/0278364919840415
Periodicals
Keywords
Field
DocType
physical human-robot interaction, cooperative manipulators, admittance control, human-in-the-loop
Interaction control,Control theory,Manipulator,Control engineering,Human-in-the-loop,Admittance,Mathematics,Human–robot interaction
Journal
Volume
Issue
ISSN
38
6
0278-3649
Citations 
PageRank 
References 
9
0.67
0
Authors
6
Name
Order
Citations
PageRank
Federica Ferraguti18810.65
Chiara Talignani Landi2203.75
Lorenzo Sabattini339336.65
Marcello Bonfé46612.78
Cesare Fantuzzi527538.53
Cristian Secchi697781.94