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arXiv 2108.01012cs.RO
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快速探索地面车辆的随机图次优视图探索

Rapidly-Exploring Random Graph Next-Best View Exploration for Ground Vehicles

Technical University Bergakademie Freiberg(弗赖贝格工业大学);Nuremberg Institute of Technology Georg Simon Ohm(纽伦堡应用技术大学乔治·西蒙·欧姆)

Marco Steinbrink, Philipp Koch, Bernhard Jung, Stefan May

摘要:

在本文中,介绍了一种新的方法,利用快速探索随机图,以提高采样为基础的自主探索未知环境的无人地面车辆相比,目前的最先进的。其预期用途是在救援场景中的大型室内和地下环境中的遥操作能力有限。局部和全局采样用于提高大环境下的探测效率。节点被选择为下一个勘探目标的基础上的收益-成本比来自假设的3D地图覆盖在特定的节点和距离它。所提出的方法的特点是一个连续构建的图形与解耦计算的节点增益使用计算效率高的光线追踪方法。在机器人追求目标的同时评估下一个最佳视图,这消除了在达到先前目标后等待增益计算的需要,并显著加快了探索速度。此外,网格地图用于确定图中节点之间的可遍历性,同时还提供用于朝向选定目标导航的全局计划。仿真比较所提出的方法,国家的最先进的勘探算法,并证明其优越的性能。

英文摘要:

In this paper, a novel approach is introduced which utilizes a Rapidly-exploring Random Graph to improve sampling-based autonomous exploration of unknown environments with unmanned ground vehicles compared to the current state of the art. Its intended usage is in rescue scenarios in large indoor and underground environments with limited teleoperation ability. Local and global sampling are used to improve the exploration efficiency for large environments. Nodes are selected as the next exploration goal based on a gain-cost ratio derived from the assumed 3D map coverage at the particular node and the distance to it. The proposed approach features a continuously-built graph with a decoupled calculation of node gains using a computationally efficient ray tracing method. The Next-Best View is evaluated while the robot is pursuing a goal, which eliminates the need to wait for gain calculation after reaching the previous goal and significantly speeds up the exploration. Furthermore, a grid map is used to determine the traversability between the nodes in the graph while also providing a global plan for navigating towards selected goals. Simulations compare the proposed approach to state-of-the-art exploration algorithms and demonstrate its superior performance.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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