Cited by 570Reinforcement Learning in RoboticsRobot Manipulation and LearningDomain Adaptation and Few-Shot Learning

How to train your robot with deep reinforcement learning: Lessons we have learned

Open access
Ibarz, Julian, Tan, Jie, Finn, Chelsea, Kalakrishnan, Mrinal, Pastor, Peter, Levine, Sergey·2021·The International Journal of Robotics Research

Abstract

Deep reinforcement learning (RL) has emerged as a promising approach for autonomously acquiring complex behaviors from low-level sensor observations. Although a large portion of deep RL research has focused on applications in video games and simulated control, which does not connect with the constraints of learning in real environments, deep RL has also demonstrated promise in enabling physical robots to learn complex skills in the real world. At the same time, real-world robotics provides an appealing domain for evaluating such algorithms, as it connects directly to how humans learn: as an embodied agent in the real world. Learning to perceive and move in the real world presents numerous challenges, some of which are easier to address than others, and some of which are often not considered in RL research that focuses only on simulated domains. In this review article, we present a number of case studies involving robotic deep RL. Building off of these case studies, we discuss commonly perceived challenges in deep RL and how they have been addressed in these works. We also provide an overview of other outstanding challenges, many of which are unique to the real-world robotics setting and are not often the focus of mainstream RL research. Our goal is to provide a resource both for roboticists and machine learning researchers who are interested in furthering the progress of deep RL in the real world.

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Crossref · 10.1177/0278364920987859

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185 of 185 references verified0 citation errors · 0 not checkable

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  • POMDPs more accurately describe real-world applications of robotic systems and are a major tool for training modern DRL and DIL end-to-end policy controllers.

    “POMDPs more accurately describe real-world applications of robotic systems [7] and are a major tool for training modern DRL and DIL end-to-end policy controllers.”

    From Data-Driven Robotic Manipulation of Cloth-like Deformable Objects: The Present, Challenges and Future Prospects (2023) · cites this paper as [7]

    Section 4.8 (p. 13) says real robotic systems have latency and unobservable intervening states that violate an assumption of the MDP formulation. This supports the cited clause’s concern about modeling real-world robots, but the paper does not say that POMDPs describe them more accurately. The citation is attached to that clause, not to the subsequent claim about training DRL and DIL controllers. (LLM, conf=0.78)

    Experimental — accuracy not yet measured
  • Deep reinforcement learning is data-hungry and trained through trial and error, requiring human involvement for constantly resetting the environment and preventing unsafe actions.

    “First, DRL is data-hungry and trained through trial and error which requires human involvement for constantly resetting the environment and preventing unsafe actions [7].”

    From Data-Driven Robotic Manipulation of Cloth-like Deformable Objects: The Present, Challenges and Future Prospects (2023) · cites this paper as [7]

    Section 4.7 (p. 13) says deep RL requires substantial data and that, in most robot-learning experiments to date, a human operator has reset the scene and stopped unsafe operation. The claim overstates this as a constant requirement: the same section says robots need to run without human supervision to scale data collection. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • High-dimensional or continuous state settings exacerbate the challenge of exploration and further affect data efficiency.

    “(4) high-dimensional/continuous state settings exacerbate the challenge of exploration and further affect data efficiency.”

    From Data-Driven Robotic Manipulation of Cloth-like Deformable Objects: The Present, Challenges and Future Prospects (2023) · cites this paper as [7]

    Section 4.2 (p. 8) says high-dimensional observations increase training and sample complexity, supporting the data-efficiency concern. Section 4.4 (p. 10) says exploration is particularly difficult with sparse rewards, but does not say that high-dimensional or continuous states exacerbate exploration or that this is what reduces data efficiency. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Utilising demonstration data can further reduce distribution shift because it causes the model to learn the important part of the state space.

    “We can also utilise demonstration data to further reduce the distribution shift, as it causes the model to learn the important part of the state space [7].”

    From Data-Driven Robotic Manipulation of Cloth-like Deformable Objects: The Present, Challenges and Future Prospects (2023) · cites this paper as [7]

    Section 4.4.4 (p. 11) says that adding demonstrations to model-based RL training can help a learned model capture correct dynamics in important parts of the state space. It does not say that this reduces distribution shift, and its explanation is specific to model-based RL rather than models generally. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • Data-driven approaches with deep learning, such as deep reinforcement learning and deep imitation learning, have demonstrated advantages in performing task-level and skill-level control problems.

    “In recent years, data-driven approaches with deep learning (DL) [6], such as deep reinforcement learning (DRL) [7] and deep imitation learning (DIL) [8], have demonstrated many advantages in performing task-level and skill-level control problems (Section 3.3).”

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Cites

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8 of the 193 references couldn’t be matched to a known paper.

Research works printed but not linked: 9

  1. Burda Y, Edwards H, Storkey A and Klimov O (2019) Exploration by random network distillation. In: International Conference on Learning Representations .
  2. Chen D, Zhou B, Koltun V and Kr¨ ahenb¨ uhl P (2020) Learning by cheating. In: Conference on Robot Learning . PMLR.
  3. Finn C, Yu T, Zhang T, Abbeel P and Levine S (2017b) OneShot Visual Imitation Learning via Meta-Learning. In: Conference on Robot Learning , Proceedings of Machine Learning Research , volume 78.
  4. Gandhi D, Pinto L and Gupta A (2017) Learning to fly by crashing. In: International Conference on Intelligent Robots and Systems . IEEE, pp. 3948-3955.
  5. Pathak D, Agrawal P, Efros AA and Darrell T (2017) Curiositydriven exploration by self-supervised prediction. In: Conference on Computer Vision and Pattern Recognition Workshops . IEEE, pp. 16-17.
  6. Peng XB, Abbeel P, Levine S and van de Panne M (2018a) Deepmimic: Example-guided deep reinforcement learning of physics-based character skills. ACM Transactions on Graphics (TOG) 37(4).
  7. Sermanet P, Lynch C, Chebotar Y, Hsu J, Jang E, Schaal S, Levine S and Brain G (2018) Time-contrastive networks: Selfsupervised learning from video. In: International Conference on Robotics and Automation . IEEE.
  8. Tedrake R, Zhang TW and Seung HS (2015) Learning to Walk in 20 minutes. In: Workshop on Adaptive and Learning Systems .
  9. Yu W, Turk G and Liu CK (2018) Learning symmetric and lowenergy locomotion. ACM Transactions on Graphics (TOG) 37(4).

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Authors
Ibarz, J., Tan, J., Finn, C., Kalakrishnan, M., Pastor, P., & Levine, S.
Affiliations
  • Google (United States) (US)
  • Everyday Robots, X, The Moonshot Factory, Mountain View, CA, USA
Corresponding author
Ibarz, Julian
Venue
The International Journal of Robotics Research
Published
2021-01-31
Volume
40
Issue
4-5
Pages
698-721
ISSN
  • 0278-3649 (ISSN-L)
  • 1741-3176
OpenAlex
W3126321819
Cited by
570
References
193
Citations by year
2026: 63 · 2025: 123 · 2024: 145 · 2023: 112 · 2022: 89 · 2021: 38
FWCI
33.92
Type
journal article
Language
en
Open access
Locations
  • The International Journal of Robotics Research (publishedVersion, cc-by-nc)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Reinforcement Learning in Robotics
  • Physical Sciences › Engineering › Control and Systems Engineering › Robot Manipulation and Learning
  • Physical Sciences › Computer Science › Artificial Intelligence › Domain Adaptation and Few-Shot Learning
Keywords
deep reinforcement learning, robot learning, embodied agents, physical robots, robot skill learning

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