1.长安大学地质工程与测绘学院,陕西 西安,710054
2.信息工程大学地理空间信息学院,河南 郑州,450001
李晗旭,博士,主要从事GNSS/SINS组合导航研究。2020226074@chd.edu.cn
李昕,博士,副教授。lixin2017@chd.edu.cn
收稿:2025-10-25,
纸质出版:2025-07-05
移动端阅览
李晗旭,李昕,黄观文,等.速度分类的LSTM神经网络辅助GNSS/SINS车载定位方法[J].武汉大学学报(信息科学版),2025,50(7):1311-1320.
LI Hanxu,LI Xin,HUANG Guanwen,et al.LSTM Neural Network Assisted GNSS/SINS Vehicle Positioning Based on Speed Classification[J].Geomatics and Information Science of Wuhan University,2025,50(7):1311-1320.
李晗旭,李昕,黄观文,等.速度分类的LSTM神经网络辅助GNSS/SINS车载定位方法[J].武汉大学学报(信息科学版),2025,50(7):1311-1320. DOI:,10.13203/j.whugis20230061
LI Hanxu,LI Xin,HUANG Guanwen,et al.LSTM Neural Network Assisted GNSS/SINS Vehicle Positioning Based on Speed Classification[J].Geomatics and Information Science of Wuhan University,2025,50(7):1311-1320. DOI:,10.13203/j.whugis20230061
车辆非完整性约束(non-holonomic constraint,NHC)是车载全球导航卫星系统(global navigation satellite system,GNSS)/捷联惯性导航系统( strapdown inertial navigation system,SINS)组合定位常用的增强技术,应用机器学习的手段可以建立惯性测量单元输出与NHC伪观测量的复杂映射关系,从观测域直接调整NHC伪观测量大小,在一定程度上提高了传统NHC方法的约束精度。现有的机器学习方法没有考虑车辆运动状态影响,导致NHC预测精度和可靠性不高。最新研究表明机器学习可以预测车辆的前向速度,即虚拟里程计。然而,当前研究主要是将预测虚拟NHC和虚拟里程计分开讨论,没有充分挖掘二者之间的耦合关系以及三维速度对车辆进行全约束。研究了一种基于车辆速度分类的长短期记忆(long short-term memory,LSTM)神经网络用于车辆三维速度的预测,采用三维速度约束新息自适应调整其方差域,通过车载GNSS/SINS松组合验证了所提方法的有效性。实验结果表明,所提方法预测的前向速度的平均精度为0.4 m/s,侧向和垂向速度的平均精度分别为2.4、2.1 cm/s,在模拟GNSS信号完全缺失460 s时,三维速度约束的水平定位精度上相对于惯导推算结果改善了99.40%。
Objectives
2
Vehicle non-holonomic constraint (NHC) is a commonly used enhancement technique for vehicle positioning global navigation satellite system (GNSS)/strapdown inertial navigation system (SINS) combination positioning. A complex mapping relationship between inertial measurement unit (IMU) output and NHC pseudo-observations can be established by applying machine learning methods
and the NHC pseudo-observations can be directly adjusted from the observation domain
which can improve the constraint accuracy compared with traditional NHC methods to a certain extent. Most existing machine learning methods do not consider the influence of vehicle motion state
resulting in low accuracy and reliability of NHC prediction. The latest researches show that machine learning can predict a vehicle forward speed
as a virtual odometer. However
the current research mainly discusses the prediction of virtual NHC and virtual odometer separately
and fails to fully explore the coupling relationship between them and the full constraint of three-dimensional velocity on vehicles.
Methods
2
We study a long short-term memory (LSTM) neural network based on vehicle speed classification for 3 dimensional (3D) vehicle speed prediction
and adaptively adjust its variance domain by using 3D speed residual. The vehicle GNSS/SINS positioning verifies the effectiveness of the proposed method.
Results and Conclusions
2
Experimental results show that the average accuracy of forward velocity predicted by the proposed method is 0.4 m/s
and the average accuracy of lateral and celestial velocity are 2.4 and 2.1 cm/s
respectively. The simulated GNSS signal is completely missing for 460 s
the horizontal positioning accuracy of 3D velocity constraint is improved by 99.40% compared with the inertial navigation results.
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