arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2003.13109cs.RO
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基于场景感知的LiDAR/视觉里程计融合车辆定位误差建模

Scene-Aware Error Modeling of LiDAR/Visual Odometry for Fusion-based Vehicle Localization

Peking University(北京大学)

Xiaoliang Ju, Donghao Xu, Huijing Zhao

摘要:

定位是移动机器人中的一项关键技术。在复杂的环境中,需要融合不同的定位模块以获得更鲁棒的定位结果,其中误差模型起着至关重要的作用。然而,基于外感受传感器的里程计(ESO),例如LiDAR/视觉里程计,通常提供具有场景相关误差的结果,这是难以精确建模的。针对这一问题,本文设计了一个场景感知的ESO误差模型,并在此基础上提出了一个多模态定位融合框架。此外,提出了一种端到端的学习方法来训练这种误差模型使用稀疏的全球位姿,如GPS/IMU的结果。将该方法应用于LiDAR/视觉里程计的误差建模,并与航位推算法进行融合,检验车辆定位的性能。实验结果表明,基于学习的场景感知误差模型,车辆定位精度得到了很大提高,并在非体验场景中表现出了自适应性。

英文摘要:

Localization is an essential technique in mobile robotics. In a complex environment, it is necessary to fuse different localization modules to obtain more robust results, in which the error model plays a paramount role. However, exteroceptive sensor-based odometries (ESOs), such as LiDAR/visual odometry, often deliver results with scene-related error, which is difficult to model accurately. To address this problem, this research designs a scene-aware error model for ESO, based on which a multimodal localization fusion framework is developed. In addition, an end-to-end learning method is proposed to train this error model using sparse global poses such as GPS/IMU results. The proposed method is realized for error modeling of LiDAR/visual odometry, and the results are fused with dead reckoning to examine the performance of vehicle localization. Experiments are conducted using both simulation and real-world data of experienced and unexperienced environments, and the experimental results demonstrate that with the learned scene-aware error models, vehicle localization accuracy can be largely improved and shows adaptiveness in unexperienced scenes.

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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