Analysis on Systematic Errors of Aeromagnetic Compensation Caused by Measurement Uncertainties of Three-Axis Magnetometers

Wu, Pei‐Lin; Zhang, Qunying; Chen, Luzhao; Fang, Guangyou

doi:10.1109/jsen.2018.2875025

Cited by 12 publications

(4 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…( 6) Steps ( 2) and (3) were repeated with these new data. (7) The total interference magnetic field was obtained by multiplying the compensation matrix with the compensation coefficients obtained previously.…”

Section: Improved Modelmentioning

confidence: 99%

“…In the course of the aeromagnetic process, the flight direction and changes in the motion posture will cause the magnetic elements of the UAV to produce a magnetic field, which interferes with the magnetometer and affects the accuracy of the measurement. In order to ensure that the magnetometer is able to accurately measure the geomagnetic field, magnetic compensation is required to offset this interference [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An Aeromagnetic Compensation Strategy for Large UAVs

Ye,

Yu,

Zhang

et al. 2024

Sensors

View full text Add to dashboard Cite

Aeromagnetic surveys are widely used in geological exploration, mineral resource assessment, environmental monitoring, military reconnaissance, and other areas. It is necessary to perform magnetic compensation for interference in these fields. In recent years, large unmanned aerial vehicles (UAVs) have been more suitable for magnetic detection missions because of the greater loads they can carry. This article proposes some methods for the magnetic compensation of large multiload UAVs. Because of the interference of the large platform and instrument noise, the standard deviations (stds) of the compensation data used in this paper are larger. At the beginning of this article, using the traditional T-L model, we avoid the shortcomings of the anti-magnetic interference ability of triaxial magnetic gate magnetometers. The direction cosine information is obtained by using an inertial navigation system, the global positioning system, and a triaxial magnetic gate magnetometer. Then, we increase the amplitude of the maneuvers in the compensation process; this reduces the multicollinearity problems in the compensation matrix to a certain extent, but it also results in greater magnetic field interference. Lastly, we employ the method of Lasso regularization Newton iteration (LRNM). Compared to the traditional methods of least squares (LS) and singular value decomposition (SVD), LRNM provides improvements of 34% and 27%, respectively. In summary, this series of schemes can be used to perform effective compensation for large multi-load UAVs and improve the actual use of large UAVs, making them more accurate in the measurement of aeromagnetic survey data.

show abstract

Section: Improved Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Aeromagnetic Compensation Strategy for Large UAVs

Ye,

Yu,

Zhang

et al. 2024

Sensors

View full text Add to dashboard Cite

show abstract

“…2 error analysis [5][6][7][8][9][10]. The estimated coefficients of the Tolles-Lawson model are used to calculate and remove the magnetic interference caused by aircraft.…”

Section: Introductionmentioning

confidence: 99%

A Modified Aeromagnetic Compensation Method Robust to In-Cabin OBE Interferences

Liu,

Li,

Wei

et al. 2024

Preprint

View full text Add to dashboard Cite

Aeromagnetic compensation plays a vital role in geomagnetic navigation and has received considerable attention throughout last few decades. Classical aeromagnetic compensation methods based on the Tolles–Lawson (T-L) model are mainly aimed at permanent, induced, and eddy-current magnetic interferences of aircraft platform, which ignores other stray magnetic field interference on the platform including the interferences caused by on-board electronic (OBE) systems. In order to cooperate with TL model, magnetometers are usually required to be installed on the extension rod outside the cabin, which is widely applied to geophysical magnetic survey. In order to ensure safety and reduce the cost of platform modification in geomagnetic navigation, it’s necessary to place magnetometers inside the cabin. It also further exacerbates the magnetic interferences and improves the difficulty of magnetic compensation. In this paper, a modified aeromagnetic compensation method is proposed, and the in-cabin OBE interferences are respectively modelled to be proportional to the currents and their temporal variations of different electronic devices. To ensure that modified model adapts to strong OBE interference in the cabin, a cut-off frequency determination method based on curvature calculation and a feature selection method based on correlation calculation are proposed. The cut-off frequency determination method helps to select passband filter which suitable for in-cabin OBE interference. The feature selection method can help to effectively select current and voltage inputs for modified model. In addition, principal component analysis (PCA) is adopted to reduce multicollinearity which is intensified by the extension of OBE interferences in coefficient-estimating. Experiments on public dataset are conducted to illustrate the effectiveness of the proposed method, and the best compensation result achieved 1.71nT of root mean square error (RMSE).

show abstract

“…The magnetic sensor array is composed of magnetic vector sensors following a certain spatial distribution. It can detect magnetic anomalies by measuring the spatial change rates of the three components of a magnetic field along the orthogonal coordinate system and has been widely applied in the fields of aviation geophysical exploration [1][2][3][4], magnetic dipole localization [5][6][7][8][9][10], geophysical surveys [11][12][13], biomagnetic [14][15][16], underwater unmanned aerial vehicle navigation, and geomagnetic navigation [17][18][19][20][21][22]. To achieve high sensitivity detection of weak magnetic targets, it is necessary to improve its data quality [23].…”

Section: Introductionmentioning

confidence: 99%

Correction of Three Sensors in a Magnetic Field Gradiometer

Xiao

Tang

et al. 2022

Journal of Sensors

View full text Add to dashboard Cite

A magnetic sensor array is usually used for weak magnetic target detection. This paper presents a vector second-order gradiometer that is arranged in a vertical structure. The measurement accuracy of the gradiometer is affected by the error of each three-axis magnetometer (TAM) and the misalignment error between TAMs. By analyzing the error mechanism of the magnetic gradiometer test system, the corresponding error model for the correction of the gradient of the component is established. The error parameters of the gradiometer were estimated by the proposed method, and the gradient error of the magnetic field and the component gradient error of the magnetic field were corrected. After correction, the gradiometer is used to localize the magnetic target. Simulation results illustrate that the localization error of magnetic targets is reduced by two orders. Thus, this proposed correction method can effectively improve the locating performance of gradiometer.

show abstract

Analysis on Systematic Errors of Aeromagnetic Compensation Caused by Measurement Uncertainties of Three-Axis Magnetometers

Cited by 12 publications

References 26 publications

An Aeromagnetic Compensation Strategy for Large UAVs

An Aeromagnetic Compensation Strategy for Large UAVs

A Modified Aeromagnetic Compensation Method Robust to In-Cabin OBE Interferences

Correction of Three Sensors in a Magnetic Field Gradiometer

Contact Info

Product

Resources

About