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arXiv 2406.02161cs.ROeess.SP
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一种可观测性约束的磁场辅助惯性导航系统——扩展版

An Observability-Constrained Magnetic Field-Aided Inertial Navigation System -- Extended Version

Linköping University(林雪平大学);KTH Royal Institute of Technology(皇家理工学院)

Chuan Huang, Gustaf Hendeby, Isaac Skog

AI总结:

针对偏航角可观测性错误导致的不确定性估计不一致问题,研究提出可观测性约束的磁场辅助惯性导航方法,扩展了原有可观测性约束EKF,经仿真和实测验证可提升估计精度与不确定性一致性。

摘要:

在定位系统中维持一致的不确定性估计至关重要,因为感知到的不确定性通常会影响上层系统组件,例如控制或决策流程。针对偏航角可观测性错误导致偏航角不确定性估计不一致的问题,本文提出了一种构建可观测性约束的磁场辅助惯性导航系统的方法。该方法基于此前提出的可观测性约束扩展卡尔曼滤波(Extended Kalman Filter, EKF),并将其扩展以适配基于磁场的里程计辅助惯性导航系统。研究通过仿真和真实数据对该方法进行评估,结果表明:(i)系统可观测性特性得以保留;(ii)估计精度有所提升;(iii)EKF计算得到的感知不确定性与滤波器估计的真实不确定性更具一致性。

英文摘要:

Maintaining consistent uncertainty estimates in localization systems is crucial as the perceived uncertainty commonly affects high-level system components, such as control or decision processes. A method for constructing an observability-constrained magnetic field-aided inertial navigation system is proposed to address the issue of erroneous yaw observability, which leads to inconsistent estimates of yaw uncertainty. The proposed method builds upon the previously proposed observability-constrained extended Kalman filter and extends it to work with a magnetic field-based odometry-aided inertial navigation system. The proposed method is evaluated using simulation and real-world data, showing that (i) the system observability properties are preserved, (ii) the estimation accuracy increases, and (iii) the perceived uncertainty calculated by the EKF is more consistent with the true uncertainty of the filter estimates.

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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