Parareal with a learned coarse model for robotic manipulation
Parareal with a learned coarse model for robotic manipulation
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Parareal 具有用于机器人操作的学习粗略模型
DOI:
10.1007/s00791-020-00327-0
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发表时间:
2020
影响因子:
--
通讯作者:
Agboh W
中科院分区:
文献类型:
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作者:
Agboh W
A key component of many robotics model-based planning and control algorithms is physics predictions, that is, forecasting a sequence of states given an initial state and a sequence of controls. This process is slow and a major computational bottleneck for robotics planning algorithms. Parallel-in-time integration methods can help to leverage parallel computing to accelerate physics predictions and thus planning. The Parareal algorithm iterates between a coarse serial integrator and a fine parallel integrator. A key challenge is to devise a coarse model that is computationally cheap but accurate enough for Parareal to converge quickly. Here, we investigate the use of a deep neural network physics model as a coarse model for Parareal in the context of robotic manipulation. In simulated experiments using the physics engine Mujoco as fine propagator we show that the learned coarse model leads to faster Parareal convergence than a coarse physics-based model. We further show that the learned coarse model allows to apply Parareal to scenarios with multiple objects, where the physics-based coarse model is not applicable. Finally, we conduct experiments on a real robot and show that Parareal predictions are close to real-world physics predictions for robotic pushing of multiple objects. Code ( https://doi.org/10.5281/zenodo.3779085 ) and videos ( https://youtu.be/wCh2o1rf-gA ) are publicly available.
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DOI:
10.1007/978-3-030-44051-0_38
发表时间:
2018-12
期刊:
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影响因子:
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作者:
Brian Plancher;S. Kuindersma
通讯作者:
Brian Plancher;S. Kuindersma
DOI:
10.1007/978-3-030-44051-0_40
发表时间:
2020
期刊:
Workshop on the Algorithmic Foundations of Robotics
影响因子:
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作者:
Fan, T.;Schultz, J.;Murphey, T.
通讯作者:
Murphey, T.
DOI:
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发表时间:
2020
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作者:
Papallas R
通讯作者:
Papallas R
DOI:
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发表时间:
2018
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影响因子:
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作者:
Agboh W
通讯作者:
Agboh W
DOI:
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发表时间:
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