Extended aeromagnetic compensation modelling including non-manoeuvring interferences
Extended aeromagnetic compensation modelling including non-manoeuvring interferences
复制标题
扩展的航磁补偿模型，包括非机动干扰
DOI：
10.1049/iet-smt.2018.5654
复制
发表时间：
2019-09-01
影响因子：
1.4
通讯作者：
Guo, Hong
中科院分区：
文献类型：
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作者：
Du, Changping;Wang, Haidong;Guo, Hong
航磁补偿是消除飞行器平台产生的磁干扰，在航磁应用中起着至关重要的作用。传统的补偿方法是基于Tolles-Lawson（T-L）模型，该模型仅考虑操纵干扰。然而，由于其他因素，如来自电气系统和可移动部件的电流，在实践中发现的磁干扰是显着的。在研究中，作者考虑了这些干扰因素，包括频闪灯和信标灯，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。由于频闪和信标灯的干扰建模成正比的电流和它们的时间变化。模型系数可以在地面试验中预先估计。旋转方向舵和升降舵的干扰仍然由T-L模型表征，但在局部方向舵或升降舵坐标系中，并且补偿系数可以在地面或天空中获得。地面和空中的现场实验进行了说明所提出的建模，并获得了改善的补偿结果。
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.