Deriving Rewards for Reinforcement Learning from Symbolic Behaviour Descriptions of Bipedal Walking
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Abstract (arXiv)
Generating physical movement behaviours from their symbolic description is a long-standing challenge in artificial intelligence (AI) and robotics, requiring insights into numerical optimization methods as well as into formalizations from symbolic AI and reasoning. In this paper, a novel approach to finding a reward function from a symbolic description is proposed. The intended system behaviour is modelled as a hybrid automaton, which reduces the system state space to allow more efficient reinforcement learning. The approach is applied to bipedal walking, by modelling the walking robot as a hybrid automaton over state space orthants, and used with the compass walker to derive a reward that incentivizes following the hybrid automaton cycle. As a result, training times of reinforcement learning controllers are reduced while final walking speed is increased. The approach can serve as a blueprint how to generate reward functions from symbolic AI and reasoning.
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References · 11
- 2017Proximal Policy Optimization Algorithmscited by 14,441
- 2020Learning Quadrupedal Locomotion over Challenging Terraincited by 494
- 2021Learning to Walk in Minutes Using Massively Parallel Deep Reinforcement Learningcited by 395
- 2018A Survey of Inverse Reinforcement Learning: Challenges, Methods and Progresscited by 294
- 2021Reinforcement Learning for Robust Parameterized Locomotion Control of Bipedal Robotscited by 95
- 2022A Walk in the Park: Learning to Walk in 20 Minutes With Model-Free Reinforcement Learningcited by 76
- 2020Sim-to-Real Learning of All Common Bipedal Gaits via Periodic Reward Compositioncited by 71
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- 2018Learning Symmetric and Low-energy Locomotioncited by 53
- 2020Learning Spring Mass Locomotion: Guiding Policies with a Reduced-Order Modelcited by 8
- 2021Design, analysis and control of the series-parallel hybrid RH5 humanoid robotcited by 1
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