Using unmanned aerial vehicles (UAVs) for airborne magnetometry offers not only improved access and rapid sampling but also reduced logistics costs. More importantly, the UAV-borne aeromagnetometry can be performed at low altitudes, which makes it possible to resolve fine features otherwise only evident in ground surveys. Developing such a UAV-borne aeromagnetometry system is challenging owing to strong magnetic interference introduced by onboard electric and electronic components. An experiment concerning the static magnetic interference of the UAV was conducted to assess the severity of the interference of a hybrid vertical take-off and landing (VTOL) UAV. The results of the static experiment show that the wing area is highly magnetic due to the proximity to servomotors and motors, whereas the area along the longitudinal axis of the UAV has a relatively smaller magnetic signature. Assisted by the static experiment and aerodynamic simulations, we first proposed a front-mounting solution with two compact magnetometers. Subsequently, two dynamic experiments were conducted with the setup to assess the dynamic interference of the system. The results of the dynamic experiments reveal that the strongest source of in-flight magnetic interference is the current-carrying cables connecting the battery to the flight controller and that this effect is most influential during pitch maneuvers of the aircraft.

中文翻译：

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使用混合动力无人机（UAV）的便携式机载磁力系统的磁干扰实验

将无人飞行器（UAV）用于机载磁强计不仅可以改善进入和快速采样的速度，而且可以降低物流成本。更重要的是，无人飞行器携带的航空电磁法可以在低空进行，这使得解析精细特征成为可能，否则这些特征只有在地面调查中才能体现出来。由于机载电气和电子组件引入了强烈的电磁干扰，因此开发这种无人飞行器车载航空电磁测量系统具有挑战性。进行了有关无人机静磁干扰的实验，以评估混合垂直起降（VTOL）无人机的干扰严重程度。静态实验结果表明，机翼区域由于靠近伺服电动机和电动机而具有很高的磁性，而沿无人机纵轴的区域具有相对较小的磁特征。在静态实验和空气动力学模拟的辅助下，我们首先提出了带有两个紧凑型磁力计的前置安装解决方案。随后，使用该设置进行了两个动态实验，以评估系统的动态干扰。动态实验的结果表明，飞行中电磁干扰的最强来源是将电池连接到飞行控制器的载流电缆，并且这种影响在飞机的俯仰操纵过程中影响最大。使用该设置进行了两个动态实验，以评估系统的动态干扰。动态实验的结果表明，飞行中电磁干扰的最强来源是将电池连接到飞行控制器的载流电缆，并且这种影响在飞机的俯仰操纵过程中影响最大。使用该设置进行了两个动态实验，以评估系统的动态干扰。动态实验的结果表明，飞行中电磁干扰的最强来源是将电池连接到飞行控制器的载流电缆，并且这种影响在飞机的俯仰操纵过程中影响最大。