Active learning via informed search in movement parameter space for efficient robot task learning and transfer
File(s)
OA Location
Author(s)
Rakicevic, Nemanja
Kormushev, Petar
Type
Journal Article
Abstract
Learning complex physical tasks via trial-and-error is still challenging for high-degree-of-freedom robots. Greatest challenges are devising a suitable objective function that defines the task, and the high sample complexity of learning the task. We propose a novel active learning framework, consisting of decoupled task model and exploration components, which does not require an objective function. The task model is specific to a task and maps the parameter space, defining a trial, to the trial outcome space. The exploration component enables efficient search in the trial-parameter space to generate the subsequent most informative trials, by simultaneously exploiting all the information gained from previous trials and reducing the task model’s overall uncertainty. We analyse the performance of our framework in a simulation environment and further validate it on a challenging bimanual-robot puck-passing task. Results show that the robot successfully acquires the necessary skills after only 100 trials without any prior information about the task or target positions. Decoupling the framework’s components also enables efficient skill transfer to new environments which is validated experimentally.
Date Issued
2019-12-01
Date Acceptance
2019-02-07
Citation
Autonomous Robots, 2019, 43 (8), pp.1917-1935
ISSN
0929-5593
Publisher
Springer Verlag
Start Page
1917
End Page
1935
Journal / Book Title
Autonomous Robots
Volume
43
Issue
8
Copyright Statement
© The Author(s) 2019. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Subjects
Science & Technology
Technology
Computer Science, Artificial Intelligence
Robotics
Computer Science
Active learning
Parameterised movements
Parameter space exploration
Bimanual manipulation
EXPLORATION
MODELS
Industrial Engineering & Automation
0801 Artificial Intelligence and Image Processing
1702 Cognitive Sciences
0913 Mechanical Engineering
Publication Status
Published
Date Publish Online
2019-02-21