ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Analysis on magnetic compensation model of fixed-wing UAV aeromagnetic detection system
Received date: 2015-11-10
Revised date: 2016-03-01
Online published: 2016-03-10
Supported by
Deep Exploration in China, SinoProbe-09-03 (201011080); R & D of Key Instruments and Technologies for Deep Resources Prospecting (the National R & D Projects for Key Scientific Instruments) (ZDYZ2012-1-0203)
In recent years, application of UAVs has been increasingly widespread, and UAVs are gradually used in aerogeophysical detection. It is inevitable to introduce magnetic interference of the airplane while detecting the geomagnetic signal on a fixed-wing UAV mounted magnetometer. Some interference is related to aircraft maneuver, while some is irrelevant. Magnetic compensation is to remove the aircraft magnetic interference related to aircraft maneuver. In the classic model, TOLLES-LAWSON's equation, the interference related to maneuver includes residual field, induced field and eddy-current field. For fixed-wing UAVs, the eddy-current field could be ignored, and the other two parts, residual field and induced field, could be referred to as the steady-state interference field. This paper analyzes the source and characteristics of aircraft magnetic interference. There are some additional proofs by ground experiments to verify the nature of ferromagnetic material. Furthermore, it would guide the aeromagnetometer installation through measuring the distribution of aircraft magnetic interference. Considering that there are obvious differences in the structure and materials between UAVs and manned aircrafts, when the classic model is applied to magnetic compensation of a fixed-wing UAV aeromagnetic detection system, it's necessary to have an in-depth understanding of the physical meaning and precondition about the model,and this is the starting point for the work in the article.
WANG Jie , GUO Ziqi , LIU Jianying . Analysis on magnetic compensation model of fixed-wing UAV aeromagnetic detection system[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016 , 37(11) : 3435 -3443 . DOI: 10.7527/S1000-6893.2016.0059
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