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- W4310631281 abstract "Ensuring safety is of paramount importance in physical human-robot interaction applications. This requires both adherence to safety constraints defined on the system state, as well as guaranteeing compliant behavior of the robot. If the underlying dynamical system is known exactly, the former can be addressed with the help of control barrier functions. The incorporation of elastic actuators in the robot's mechanical design can address the latter requirement. However, this elasticity can increase the complexity of the resulting system, leading to unmodeled dynamics, such that control barrier functions cannot directly ensure safety. In this paper, we mitigate this issue by learning the unknown dynamics using Gaussian process regression. By employing the model in a feedback linearizing control law, the safety conditions resulting from control barrier functions can be robustified to take into account model errors, while remaining feasible. In order to enforce them on-line, we formulate the derived safety conditions in the form of a second-order cone program. We demonstrate our proposed approach with simulations on a two-degree-of-freedom planar robot with elastic joints." @default.
- W4310631281 created "2022-12-13" @default.
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- W4310631281 date "2022-12-01" @default.
- W4310631281 modified "2023-09-25" @default.
- W4310631281 title "Safe Learning-Based Control of Elastic Joint Robots via Control Barrier Functions" @default.
- W4310631281 doi "https://doi.org/10.48550/arxiv.2212.00478" @default.
- W4310631281 hasPublicationYear "2022" @default.
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