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- W4385732018 abstract "Learning from humans allows nonexperts to program robots with ease, lowering the resources required to build complex robotic solutions. Nevertheless, such data-driven approaches often lack the ability to provide guarantees regarding their learned behaviors, which is critical for avoiding failures and/or accidents. In this work, we focus on reaching/point-to-point motions, where robots must always reach their goal, independently of their initial state. This can be achieved by modeling motions as dynamical systems and ensuring that they are globally asymptotically stable. Hence, we introduce a novel Contrastive Learning loss for training deep neural networks (DNN) that, when used together with an Imitation Learning loss, enforces the aforementioned stability in the learned motions. Differently from previous work, our method does not restrict the structure of its function approximator, enabling its use with arbitrary DNNs and allowing it to learn complex motions with high accuracy. We validate it using datasets and a real robot. In the former case, motions are two- and four-dimensional, modeled as first- and second-order dynamical systems. In the latter, motions are three, four, and six-dimensional, of first and second order, and are used to control a 7-DoF robot manipulator in its end effector space and joint space." @default.
- W4385732018 created "2023-08-11" @default.
- W4385732018 creator A5032303971 @default.
- W4385732018 creator A5035229829 @default.
- W4385732018 date "2023-10-01" @default.
- W4385732018 modified "2023-10-06" @default.
- W4385732018 title "Stable Motion Primitives via Imitation and Contrastive Learning" @default.
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- W4385732018 doi "https://doi.org/10.1109/tro.2023.3289597" @default.
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