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• W4383108510 abstract "Safety is one of the main challenges when applying learning-based motion controllers to practical robotic systems, especially when the dynamics of the robots and their surrounding dynamic environments are unknown. This issue is further exacerbated when the learned information is unreliable and inaccurate. In this paper, we aim to enhance the safety of learning-enabled mobile robots in dynamic environments from the perspective of distributionally robust optimization (DRO) and the unscented transform (UT). Our method infers the unknown dynamics of both the robot and the environment by adopting Gaussian process regression with an uncertainty propagation scheme based on UT to improve prediction accuracy. This leads to a novel learning-based model predictive control (MPC) method in which state information about both the robot and the environment is propagated via UT. The proposed method uses DRO to proactively limit the risk of collisions or other unsafe events in the presence of learning errors. However, the distributionally robust risk constraint is intractable because it involves a separate infinite-dimensional optimization problem. To overcome this challenge, we exploit UT with modern DRO techniques to replace the risk constraint with its simple upper bound. The performance and the utility of our method are demonstrated through simulations in autonomous driving scenarios, showing its capability to enhance safety and computational efficiency." @default.
• W4383108510 created "2023-07-05" @default.
• W4383108510 creator A5063507594 @default.
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• W4383108510 date "2023-05-29" @default.
• W4383108510 modified "2023-10-16" @default.
• W4383108510 title "Distributionally Robust Optimization with Unscented Transform for Learning-Based Motion Control in Dynamic Environments" @default.
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• W4383108510 doi "https://doi.org/10.1109/icra48891.2023.10161246" @default.
• W4383108510 hasPublicationYear "2023" @default.
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