Robust Sample-Based Output-Feedback Path Planning
Pages 5780 - 5787
Abstract
We propose a novel approach for sampling-based and control-based motion planning. We combine a representation of the environment obtained via a modified version of optimal Rapidly-exploring Random Trees (RRT<sup>*</sup>), with landmark-based output-feedback controllers obtained via Control Lyapunov Functions, Control Barrier Functions, and robust Linear Programming. Our solution inherits many benefits of RRT<sup>*</sup>-like algorithms, such as the ability to implicitly handle arbitrarily complex obstacles. Additionally, it extends planning beyond the discrete nominal paths, as feedback controllers can correct deviations from such paths, and are robust to discrepancies between the planning and real environment maps. We test our algorithms first in simulations and then in experiments, evaluating the robustness of the approach to practical conditions, such as deformations of the environment, mismatches in the dynamical model of the robot, and measurements acquired with a camera with a limited field of view.
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Sep 2021
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Published: 27 September 2021
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