Learning Hamiltonian Dynamics with Reproducing Kernel Hilbert Spaces and Random Features
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arXiv
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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866913570982199296 |
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| author | Smith, Torbjørn Egeland, Olav |
| author_facet | Smith, Torbjørn Egeland, Olav |
| contents | A method for learning Hamiltonian dynamics from a limited and noisy dataset is proposed. The method learns a Hamiltonian vector field on a reproducing kernel Hilbert space (RKHS) of inherently Hamiltonian vector fields, and in particular, odd Hamiltonian vector fields. This is done with a symplectic kernel, and it is shown how the kernel can be modified to an odd symplectic kernel to impose the odd symmetry. A random feature approximation is developed for the proposed odd kernel to reduce the problem size. The performance of the method is validated in simulations for three Hamiltonian systems. It is demonstrated that the use of an odd symplectic kernel improves prediction accuracy and data efficiency, and that the learned vector fields are Hamiltonian and exhibit the imposed odd symmetry characteristics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_07703 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Learning Hamiltonian Dynamics with Reproducing Kernel Hilbert Spaces and Random Features Smith, Torbjørn Egeland, Olav Machine Learning Robotics Systems and Control A method for learning Hamiltonian dynamics from a limited and noisy dataset is proposed. The method learns a Hamiltonian vector field on a reproducing kernel Hilbert space (RKHS) of inherently Hamiltonian vector fields, and in particular, odd Hamiltonian vector fields. This is done with a symplectic kernel, and it is shown how the kernel can be modified to an odd symplectic kernel to impose the odd symmetry. A random feature approximation is developed for the proposed odd kernel to reduce the problem size. The performance of the method is validated in simulations for three Hamiltonian systems. It is demonstrated that the use of an odd symplectic kernel improves prediction accuracy and data efficiency, and that the learned vector fields are Hamiltonian and exhibit the imposed odd symmetry characteristics. |
| title | Learning Hamiltonian Dynamics with Reproducing Kernel Hilbert Spaces and Random Features |
| topic | Machine Learning Robotics Systems and Control |
| url | https://arxiv.org/abs/2404.07703 |