arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2106.02405eess.SYcs.ROcs.SY
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基于涡流流函数的自主船舶避碰导引和操纵控制系统设计

A Guidance and Maneuvering Control System Design with Anti-collision Using Stream Functions with Vortex Flows for Autonomous Marine Vessels

University of Michigan(密歇根大学);Norwegian University of Science and Technology(挪威科技大学);Tsinghua University(清华大学)

Hongyu Zhou, Zhengru Ren, Mathias Marley, Roger Skjetne

摘要:

预计自主海洋船舶将避免船舶之间的碰撞,并遵守国际安全航行条例。提出了一种基于流函数的分步路径规划方法。采用流体的动态流动作为引导模型,通过在汇流中应用圆形定理来实现静态环境中的碰撞避免。我们将这种方法扩展到动态环境中,通过在流场中加入涡流。流函数被递归地更新,以实现飞行中的路点决策。该船避免碰撞,并遵守《国际海上避碰规则公约》的若干规则。该方法在概念上和计算上都很简单,调整方便,但通用性强,可以处理具有多个动态障碍物的复杂和密集的海上交通。考虑到船舶动力学,通过使用Bézier曲线来生成具有可行曲率的足够光滑的路径。数值模拟进行了验证所提出的方法。

英文摘要:

Autonomous marine vessels are expected to avoid inter-vessel collisions and comply with the international regulations for safe voyages. This paper presents a stepwise path planning method using stream functions. The dynamic flow of fluids is used as a guidance model, where the collision avoidance in static environments is achieved by applying the circular theorem in the sink flow. We extend this method to dynamic environments by adding vortex flows in the flow field. The stream function is recursively updated to enable on the fly waypoint decisions. The vessel avoids collisions and also complies with several rules of the Convention on the International Regulations for Preventing Collisions at Sea. The method is conceptually and computationally simple and convenient to tune, and yet versatile to handle complex and dense marine traffic with multiple dynamic obstacles. The ship dynamics are taken into account, by using Bézier curves to generate a sufficiently smooth path with feasible curvature. Numerical simulations are conducted to verify the proposed method.

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