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arXiv 2305.04576cs.RO
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一种改进的基于采样的方法,结合修正的下一最佳视角策略用于二维自主机器人探索

An Enhanced Sampling-Based Method With Modified Next-Best View Strategy For 2D Autonomous Robot Exploration

VNU University of Engineering and Technology(越南国立大学工程技术大学)

Dong Huu Quoc Tran, Hoang-Anh Phan, Hieu Dang Van, Tan Van Duong, Tung Thanh Bui, Van Nguyen Thi Thanh

AI总结:

本研究提出一种增强的基于采样的二维室内机器人自主探索方法,通过改进的下一最佳视角策略和增强效用函数,在模拟和真实环境中实现更大探索面积并减少行驶距离和时间。

摘要:

自主探索是机器人领域的一项新技术,因其旨在帮助机器人在无需人工控制的情况下独立定位、扫描地图并导航任何地形而得到广泛应用。迄今为止,基于采样的探索策略对于配备深度传感器、生成三维点云的空中和地面车辆最为有效。这些方法利用采样任务选择随机点,或基于快速探索随机树(RRT)生成样本。然后,它们决定具有有用体积信息的前沿或下一最佳视角(NBV)。然而,大多数最先进的基于采样的方法由于缺乏环境知识而难以在二维机器人中实施,从而导致评估随机目的地时的体积增益不佳。本研究提出了一种增强的基于采样的解决方案,用于室内机器人探索,以在二维环境中决定下一最佳视角(NBV)。我们的方法生成RRT,直到其端点成为前沿,并使用增强的效用函数对其进行评估。从环境中获得的体积信息通过非均匀分布进行估计,以确定被占用且具有不确定概率的单元格。与基于采样的前沿检测和后退视界NBV方法相比,所执行的方法在Gazebo平台模拟环境中表现更好,实现了显著更大的探索面积,平均距离和行驶时间减少。此外,在作者构建的二维机器人上操作所提出的方法探索整个自然环境,证实了该方法在现实场景中的有效性和适用性。

英文摘要:

Autonomous exploration is a new technology in the field of robotics that has found widespread application due to its objective to help robots independently localize, scan maps, and navigate any terrain without human control. Up to present, the sampling-based exploration strategies have been the most effective for aerial and ground vehicles equipped with depth sensors producing three-dimensional point clouds. Those methods utilize the sampling task to choose random points or make samples based on Rapidly-exploring Random Trees (RRT). Then, they decide on frontiers or Next Best Views (NBV) with useful volumetric information. However, most state-of-the-art sampling-based methodology is challenging to implement in two-dimensional robots due to the lack of environmental knowledge, thus resulting in a bad volumetric gain for evaluating random destinations. This study proposed an enhanced sampling-based solution for indoor robot exploration to decide Next Best View (NBV) in 2D environments. Our method makes RRT until have the endpoints as frontiers and evaluates those with the enhanced utility function. The volumetric information obtained from environments was estimated using non-uniform distribution to determine cells that are occupied and have an uncertain probability. Compared to the sampling-based Frontier Detection and Receding Horizon NBV approaches, the methodology executed performed better in Gazebo platform-simulated environments, achieving a significantly larger explored area, with the average distance and time traveled being reduced. Moreover, the operated proposed method on an author-built 2D robot exploring the entire natural environment confirms that the method is effective and applicable in real-world scenarios.

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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