Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. A Dynamical System Approach for Catching Softly a Flying Object: Theory and Experiment
 
Loading...
Thumbnail Image
research article

A Dynamical System Approach for Catching Softly a Flying Object: Theory and Experiment

Mirrazavi Salehian, Seyed Sina  
•
Khoramshahi, Mahdi  
•
Billard, Aude  
2016
IEEE Transactions on Robotics

Catching a fast flying object is particularly challenging as consists of two tasks: it requires extremely precise estimation of the object’s motion and control of the robot motion. Any small imprecision may lead the fingers to close too abruptly and let the object fly away from the hand before closing. We present a strategy to overcome for sensori- motor imprecision by introducing softness in the catching approach. Soft catching consists of having the robot moves with the object for a short period of time, so as to leave more time for the fingers to close on the object. We use a dynamical systems (DS) based control law to generate the appropriate reach and follow motion, which is expressed as a Linear Parameter Varying (LPV) system. We propose a method to approximate the parameters of LPV systems using Gaussian Mixture Models, based on a set of kinematically feasible demonstrations generated by an off-line optimal control framework. We show theoretically that the resulting DS will intercept the object at the intercept point, at the right time with the desired velocity direction. Stability and convergence of the approach are assessed through Lyapunov stability theory. The proposed method is validated systematically to catch three objects that generate elastic contacts and demonstrate important improvement over a hard catching approach.

  • Files
  • Details
  • Metrics
Type
research article
DOI
10.1109/Tro.2016.2536749
Web of Science ID

WOS:000374306700016

Author(s)
Mirrazavi Salehian, Seyed Sina  
•
Khoramshahi, Mahdi  
•
Billard, Aude  
Date Issued

2016

Publisher

Institute of Electrical and Electronics Engineers

Published in
IEEE Transactions on Robotics
Volume

32

Issue

2

Start page

462

End page

471

Subjects

Soft catching

•

Dynamical system

Peer reviewed

NON-REVIEWED

Written at

EPFL

EPFL units
LASA  
Available on Infoscience
February 26, 2016
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/124441
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés