arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2312.02424cs.RO
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GNSS里程计:基于载波相位周跳估计的精确轨迹估计

GNSS Odometry: Precise Trajectory Estimation Based on Carrier Phase Cycle Slip Estimation

Chiba Institute of Technology(千叶工业大学)

Taro Suzuki

AI总结:

本文针对GNSS TDCP受载波相位周跳影响的问题,提出在因子图优化中检测、估计并修正周跳,使单接收机无人机轨迹估计达到5至30厘米精度。

摘要:

本文提出了一种利用全球导航卫星系统(GNSS)载波相位时间差分(TDCP)测量值,为户外移动机器人提供高精度轨迹估计的方法。通过使用GNSS TDCP,可以毫米级精度估计三维相对位置。然而,当发生被称为周跳的现象时,载波相位测量值会发生跳变并变得不连续,此时无法使用TDCP准确估计相对位置。尽管以往研究采用鲁棒优化技术来消除周跳的影响,但很难完全消除异常值的影响。本文提出一种方法,在factor graph optimization(因子图优化)框架下检测GNSS载波相位周跳、估计周跳量,并修正观测到的TDCP以计算相对位置。估计出的相对位置在图优化中充当回环闭合,有助于降低相对位置的积分误差。在无人机上进行的实验表明,通过使用所提方法修正周跳,仅使用单个GNSS接收机,而不使用任何其他外部数据或传感器,即可以5至30厘米的精度估计飞行器轨迹。

英文摘要:

This paper proposes a highly accurate trajectory estimation method for outdoor mobile robots using global navigation satellite system (GNSS) time differences of carrier phase (TDCP) measurements. By using GNSS TDCP, the relative 3D position can be estimated with millimeter precision. However, when a phenomenon called cycle slip occurs, wherein the carrier phase measurement jumps and becomes discontinuous, it is impossible to accurately estimate the relative position using TDCP. Although previous studies have eliminated the effect of cycle slip using a robust optimization technique, it was difficult to completely eliminate the effect of outliers. In this paper, we propose a method to detect GNSS carrier phase cycle slip, estimate the amount of cycle slip, and modify the observed TDCP to calculate the relative position using the factor graph optimization framework. The estimated relative position acts as a loop closure in graph optimization and contributes to the reduction in the integration error of the relative position. Experiments with an unmanned aerial vehicle showed that by modifying the cycle slip using the proposed method, the vehicle trajectory could be estimated with an accuracy of 5 to 30 cm using only a single GNSS receiver, without using any other external data or sensors.

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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