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• W2166194012 abstract "Autonomous vehicles require optimal path planning algorithms to achieve mission goals while avoiding obstacles and being robust to uncertainties. The uncertainties arise from exogenous disturbances, modeling errors, and sensor noise, which can be characterized via stochastic models. Previous work defined a notion of robustness in a stochastic setting by using the concept of chance constraints. This requires that mission constraint violation can occur with a probability less than a prescribed value.In this paper we describe a novel method for optimal chance constrained path planning with feedback design. The approach optimizes both the reference trajectory to be followed and the feedback controller used to reject uncertainty. Our method extends recent results in constrained control synthesis based on convex optimization to solve control problems with nonconvex constraints. This extension is essential for path planning problems, which inherently have nonconvex obstacle avoidance constraints. Unlike previous approaches to chance constrained path planning, the new approach optimizes the feedback gain as wellas the reference trajectory.The key idea is to couple a fast, nonconvex solver that does not take into account uncertainty, with existing robust approaches that apply only to convex feasible regions. By alternating between robust and nonrobust solutions, the new algorithm guarantees convergence to a global optimum. We apply the new method to an unmanned aircraft and show simulation results that demonstrate the efficacy of the approach." @default.
• W2166194012 created "2016-06-24" @default.
• W2166194012 creator A5039819888 @default.
• W2166194012 date "2008-06-15" @default.
• W2166194012 modified "2023-10-01" @default.
• W2166194012 title "Robust Path Planning and Feedback Design Under Stochastic Uncertainty" @default.
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• W2166194012 doi "https://doi.org/10.2514/6.2008-6304" @default.
• W2166194012 hasPublicationYear "2008" @default.
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