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Extended aeromagnetic compensation modelling including non-manoeuvring interferences

机译：扩展的航磁补偿建模，包括非操纵干扰

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摘要

Aeromagnetic compensation, elimination of magnetic interferences produced by the aircraft platform, plays a vital role in aeromagnetic applications. Conventional compensation methods are based on the Tolles-Lawson (T-L) model, which accounts for only the manoeuvring interferences. However, magnetic interferences due to other factors, such as currents from electrical systems and movable parts, are found significant in practice. In this study, the authors take these interference factors into consideration, including the strobe light and beacon light, the rudder and elevator. The magnetic interference from constant current is equivalent to the 'permanent magnetisation' and has been contained in the T-L model. The interferences due to the strobe and beacon lights are modelled to be proportional to the currents and their temporal variations. The model coefficients can be estimated in advance in a ground experiment. The interferences by the pivoting rudder and elevator are still characterised by the T-L model but in the local rudder or elevator coordinate systems, and the compensated coefficients can be obtained on the ground or in the sky. Onsite experiments both on the ground and in the sky are conducted to illustrate the proposed modelling, and improved compensation results are obtained.
机译：航空磁补偿，消除了飞机平台产生的电磁干扰，在航空磁应用中起着至关重要的作用。常规补偿方法基于Tolles-Lawson（T-L）模型，该模型仅考虑了操纵干扰。然而，在实践中发现由于其他因素（例如来自电气系统和可移动部件的电流）引起的磁干扰是很重要的。在这项研究中，作者考虑了这些干扰因素，包括频闪灯和信标灯，方向舵和电梯。恒定电流产生的磁干扰等效于“永久磁化”，并已包含在T-L模型中。将频闪灯和信标灯造成的干扰建模为与电流及其时间变化成比例。可以在地面实验中预先估计模型系数。旋转舵和升降舵的干扰仍以T-L模型为特征，但在局部舵或升降舵坐标系中，可以在地面或空中获得补偿系数。进行了地面和空中的现场实验，以说明所提出的模型，并获得了改进的补偿结果。

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