Disentangled relational representations for explaining and learning from demonstration

Yordan Hristov, Daniel Angelov, Michael Burke, Alex Lascarides, Subramanian Ramamoorthy

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

Abstract

Learning from demonstration is an effective method for human users to instruct desired robot behaviour. However, for most non-trivial tasks of practical interest, efficient learning from demonstration depends crucially on inductive bias in the chosen structure for rewards/costs and policies. We address the case where this inductive bias comes from an exchange with a human user. We propose a method in which a learning agent utilizes the information bottleneck layer of a high-parameter variational neural model, with auxiliary loss terms, in order to ground abstract concepts such as spatial relations. The concepts are referred to in natural language instructions and are manifested in the high-dimensional sensory input stream the agent receives from the world. We evaluate the properties of the latent space of the learned model in a photorealistic synthetic environment and particularly focus on examining its usability for downstream tasks. Additionally, through a series of controlled table-top manipulation experiments, we demonstrate that the learned manifold can be used to ground demonstrations as symbolic plans, which can then be executed on a PR2 robot.
Original languageEnglish
Title of host publication3rd Annual Conference on Robot Learning, CoRL 2019
EditorsLeslie Pack Kaelbling, Danica Kragic, Komei Sugiura
Place of PublicationLondon UK
PublisherProceedings of Machine Learning Research (PMLR)
Pages870-884
Number of pages15
Volume100
Publication statusPublished - 2019
Externally publishedYes
EventConference on Robot Learning 2019 - Osaka, Japan
Duration: 30 Oct 20191 Nov 2019
Conference number: 3rd
http://proceedings.mlr.press/v100/ (Proceedings)
https://web.archive.org/web/20191022151748/https://www.robot-learning.org/ (Website)

Conference

ConferenceConference on Robot Learning 2019
Abbreviated titleCoRL 2019
CountryJapan
CityOsaka
Period30/10/191/11/19
Internet address

Keywords

  • human-robot interaction
  • interpretable symbol grounding
  • learning from demonstration

Cite this