ノイズ誘起ナビゲーション:非凸領域とコンパクト多様体における大域的安定化
Noise-Induced Navigation in Non-convex Domains and Compact Manifolds
制御チャネルにノイズを加えることで、障害物のあるユークリッド領域や境界のない多様体上で、目標点への大域的漸近安定性を達成するフィードバック則を構築する手法を提案した。
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分類: math.OC, cs.RO, eess.SY
原文アブストラクト
In this note, we study the problem of designing a feedback law that globally steers a system to a prescribed target configuration. Even if the system is fully actuated, topological obstructions generally prevent the existence of globally asymptotically stabilizing continuous feedback laws. We revisit this problem in a stochastic setting by allowing noise to enter through the control channels. Using a criterion for asymptotic stability in the large that combines local Lyapunov stability with positive recurrence, we constructively show that one can construct elementary feedback laws that achieve global asymptotic stability in the large, of the target equilibrium point in connected Euclidean domains with obstacles and manifolds without boundary. For Euclidean domains with obstacles, we also show that the method extends naturally to the problem of finding the minimizer of a strongly convex function with non-convex constraints. Numerical experiments illustrate the effectiveness of the approach for Euclidean domains with circular obstacles and the two dimensional sphere. Additionally, we study the role noise strength when there is a non-convex obstacle, in which case the system might show metastability.