Research on magnetic interference tests of multi-rotor Unmanned Aerial Vehicle(UAV)intended for aeromagnetic surveying
In the early stage of Unmanned Aerial Vehicle(UAV)aeromagnetic surveying,a comprehensive evaluation of UAV-related magnetic interference sources and characteristics can provide basis support for determining the appropriate installation position and method of the magnetometer,and selecting effective data noise reduction measures.Taking multi-rotor UAV as an example,this paper conducts magnetic characteristics mapping of the UAV,interference testing of abnormal parts under different conditions,time-frequency analysis of motor interference signals,and the interference distance testing during its dynamic flight.According to the research results,it identifies that motor and current are the main interference sources.Generation and transmission of current will not only change the original static interference intensity,but also produce dynamic vibration noise.The vibration signal during the motor rotation is multi-frequency compound interference,and the relationship between different frequencies is related to its rotation speed,the number of rotors and stators.The interference signal intensity recorded by the magnetometer rapidly decays as the distance between it and the interference source increases,and can be ignored beyond a certain distance.The method in this paper can serve as a reference for other UAV interference tests,and the relevant conclusions can also be used to guide the installation of magnetometers and data noise reduction.
Aeromagnetic surveyingMulti-rotor UAVMagnetic interference sources and characteristicsInterference tests
万方数据
维普
