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research article

Accelerated Sensorimotor Learning of Compliant Movement Primitives

Petric, Tadej  
•
Gams, Andrej  
•
Colasanto, Luca  
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December 1, 2018
Ieee Transactions On Robotics

Autonomous trajectory generation through generalization requires a database of motion, which can be difficult and time consuming to obtain. In this paper, we propose a method for autonomous expansion of a database for the generation of compliant and accurate motion, achieved through the framework of compliant movement primitives (CMPs). These combine task-specific kinematic and corresponding feed-forward dynamic trajectories. The framework allows for generalization and modulation of dynamic behavior. Inspired by human sensorimotor learning abilities, we propose a novel method that can autonomously learn task-specific torque primitives (TPs) associated to given kinematic trajectories, encoded as dynamic movement primitives. The proposed algorithm is completely autonomous, and can be used to rapidly generate and expand the CMP database. Since CMPs are parameterized, statistical generalization can be used to obtain an initial TP estimate of a new CMP. Thereby, the learning rate of new CMPs can be significantly improved. The evaluation of the proposed approach on a Kuka LWR-4 robot performing a peg-in-hole task shows fast TP acquisition and accurate generalization estimates in real-world scenarios.

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Type
research article
DOI
10.1109/TRO.2018.2861921
Web of Science ID

WOS:000453564100016

Author(s)
Petric, Tadej  
Gams, Andrej  
Colasanto, Luca  
Ijspeert, Auke J.  
Ude, Ales
Date Issued

2018-12-01

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Published in
Ieee Transactions On Robotics
Volume

34

Issue

6

Start page

1636

End page

1642

Subjects

Robotics

•

autonomous learning

•

compliant movement primitives (cmps)

•

internal dynamic models

•

motion

•

models

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
BIOROB  
Available on Infoscience
January 3, 2019
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/153299
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