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  4. Dual-Arm Control for Coordinated Fast Grabbing and Tossing of an Object
 
research article

Dual-Arm Control for Coordinated Fast Grabbing and Tossing of an Object

Bombile Bosongo, Michael  
•
Billard, Aude  
2022
IEEE Robotics and Automation Magazine

Picking up objects to toss them on a conveyor belt are activities generated on a daily basis in the industry. These tasks are still done largely by humans. This paper proposes a unified motion generator for a bimanual robotic systems that enables two 7 degrees of freedom robotic arms to grab and toss an object in one swipe. Unlike classical approaches that grab the object with quasi-zero contact velocity, the proposed approach is able to grasp the object while in motion. We control the contact forces prior to and following impact so as to stabilize the robots’ grip on the object. We show that such swift grasping speeds up the pick-and-place process and reduces energy expenditure for tossing. Continuous control of reach, grab and toss motion is achieved by combining a sequence of time-invariant dynamical system in a single control framework. We introduce a state-dependent modulation function to control the generated velocity in different directions. The framework is validated in simulation and on a real dual-arm system. We show that we can precisely toss objects within a workspace of 0.2 by 0.4 square meter. Moreover, we show that the algorithm can adapt on the fly to changes in object location.

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Type
research article
DOI
10.1109/MRA.2022.3177355
Author(s)
Bombile Bosongo, Michael  
Billard, Aude  
Date Issued

2022

Published in
IEEE Robotics and Automation Magazine
Subjects

dual-arm robot

•

dynamical systems

•

dynamic manipulation

•

fast grabbing

•

tossing

•

pick-and-toss

URL

accompanying video

https://youtu.be/USXdkoH5t5g
Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LASA  
Available on Infoscience
June 2, 2022
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/188238
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