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arXiv 2202.06273cs.RO
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使用粒子在动态环境中进行连续占据建图

Continuous Occupancy Mapping in Dynamic Environments Using Particles

Shanghai Jiaotong University(上海交通大学);Delft University of Technology(代尔夫特理工大学)

Gang Chen, Wei Dong, Peng Peng, Javier Alonso-Mora, Xiangyang Zhu

AI总结:

本文针对粒子占据建图的栅格尺寸问题,提出连续空间粒子建图方法,通过体素与金字塔式子空间划分、初始速度估计和混合模型,实现动态与静态障碍物的高效连续占据估计。

摘要:

近年来,基于粒子的动态占据地图被提出用于对动态环境中的障碍物进行建模。当前的基于粒子的地图以离散栅格形式描述占据状态,并存在栅格尺寸问题,其中较大的栅格尺寸不利于运动规划,而较小的栅格尺寸会降低效率并导致间隙和不一致。为了解决这个问题,本文将基于粒子的地图推广到连续空间,并构建了一个高效的3D以自我为中心的局部地图。提出了一种由体素子空间划分和一种新颖的金字塔式子空间划分组成的双结构子空间划分范式,以在考虑遮挡的情况下高效地传播粒子并更新地图。然后可以利用粒子的权重来估计地图空间中任意点的占据状态。为了进一步提升同时建模静态和动态障碍物的性能并最小化噪声,采用了一种初始速度估计方法和一个混合模型。实验结果表明,我们的地图能够有效且高效地对动态障碍物和静态障碍物进行建模。与最先进的栅格形式基于粒子的地图相比,我们的地图实现了连续占据估计,并在不同分辨率下显著提升了性能。

英文摘要:

Particle-based dynamic occupancy maps were proposed in recent years to model the obstacles in dynamic environments. Current particle-based maps describe the occupancy status in discrete grid form and suffer from the grid size problem, wherein a large grid size is unfavorable for motion planning, while a small grid size lowers efficiency and causes gaps and inconsistencies. To tackle this problem, this paper generalizes the particle-based map into continuous space and builds an efficient 3D egocentric local map. A dual-structure subspace division paradigm, composed of a voxel subspace division and a novel pyramid-like subspace division, is proposed to propagate particles and update the map efficiently with the consideration of occlusions. The occupancy status of an arbitrary point in the map space can then be estimated with the particles' weights. To further enhance the performance of simultaneously modeling static and dynamic obstacles and minimize noise, an initial velocity estimation approach and a mixture model are utilized. Experimental results show that our map can effectively and efficiently model both dynamic obstacles and static obstacles. Compared to the state-of-the-art grid-form particle-based map, our map enables continuous occupancy estimation and substantially improves the performance in different resolutions.

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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