A Novel Strategy for Improving the Aeromagnetic Compensation Performance of Helicopters
| Autor: | Guangyou Fang, Zhu Wanhua, Feng Yongqiang, Peilin Wu, Luzhao Chen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Field (physics)
Computer science Magnetometer Acoustics 0211 other engineering and technologies 02 engineering and technology lcsh:Chemical technology 010502 geochemistry & geophysics Interference (wave propagation) 01 natural sciences Biochemistry Article Analytical Chemistry Compensation (engineering) law.invention Interference (communication) law Eddy current lcsh:TP1-1185 Electrical and Electronic Engineering Magnetic anomaly aeromagnetic compensation Instrumentation Residual magnetic field 021101 geological & geomatics engineering 0105 earth and related environmental sciences optically pumped magnetometer Avionics Atomic and Molecular Physics and Optics Magnetic field referenced magnetometer transfer function coherent noise suppression Aeromagnetic survey |
| Zdroj: | Sensors (Basel, Switzerland) Sensors Volume 18 Issue 6 Sensors, Vol 18, Iss 6, p 1846 (2018) |
| ISSN: | 1424-8220 |
| Popis: | An aeromagnetic survey is an important method in magnetic anomaly detection and geophysical prospecting. The magnetic field is typically measured by optically pumped magnetometers (OPM) installed on the aircraft. The measurement accuracy of the OPM is easily affected by the platform-generated magnetic fields. Therefore, aeromagnetic compensation is necessary. The traditional compensation model only considers the permanent, induced, and eddy current interference magnetic field of the aircraft platform. However, the interference field produced by the avionics system, and the relative motion between the aircraft and the magnetometer, are still not taken into account. To address this issue, we proposed a novel strategy to eliminate the additional interference of the platform with two OPMs. Among them, the OPM located farther away from the aircraft serves as a sensing magnetometer, whereas the near OPM serves as a reference magnetometer. The coherent noise suppression method is used to process the residual magnetic field interference after compensation. By establishing the interference magnetic transfer function between the two sensors, the interference field can be suppressed. The results of the experiments demonstrate the effectiveness of the novel strategy, and the standard deviation of residual interference drops from 0.065 nT to 0.045 nT. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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