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• W4382931248 abstract "Abstract Motion control of fish-like swimming robots presents many challenges due to the unstructured environment and unmodelled governing physics of the fluid–robot interaction. Commonly used low-fidelity control models using simplified formulas for drag and lift forces do not capture key physics that can play an important role in the dynamics of small-sized robots with limited actuation. Deep Reinforcement Learning (DRL) holds considerable promise for motion control of robots with complex dynamics. Reinforcement learning methods require large amounts of training data exploring a large subset of the relevant state space, which can be expensive, time consuming, or unsafe to obtain. Data from simulations can be used in the initial stages of DRL, but in the case of swimming robots, the complexity of fluid–body interactions makes large numbers of simulations infeasible from the perspective of time and computational resources. Surrogate models that capture the primary physics of the system can be a useful starting point for training a DRL agent which is subsequently transferred to train with a higher fidelity simulation. We demonstrate the utility of such physics-informed reinforcement learning to train a policy that can enable velocity and path tracking for a planar swimming (fish-like) rigid Joukowski hydrofoil. This is done through a curriculum where the DRL agent is first trained to track limit cycles in a velocity space for a representative nonholonomic system, and then transferred to train on a small simulation data set of the swimmer. The results show the utility of physics-informed reinforcement learning for the control of fish-like swimming robots." @default.
• W4382931248 created "2023-07-04" @default.
• W4382931248 creator A5064811415 @default.
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• W4382931248 date "2023-07-03" @default.
• W4382931248 modified "2023-09-23" @default.
• W4382931248 title "Physics-informed reinforcement learning for motion control of a fish-like swimming robot" @default.
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• W4382931248 doi "https://doi.org/10.1038/s41598-023-36399-4" @default.
• W4382931248 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37400473" @default.
• W4382931248 hasPublicationYear "2023" @default.
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