【摘要】 多旋翼无人机磁通门航磁系统以其安全、稳定、高效等特点可广泛应用于中大比例尺矿产资源探测领域,但由于磁通门传感器存在三轴不严格正交,灵敏度、零偏不一致造成的转向差,且系统作业中存在固定场干扰、感应干扰和涡流干扰,需要进行流程繁琐的标定和补偿测试.本文根据实测数据分析出航磁系统机电干扰主要来自机载设备高频干扰,针对机电干扰高频特性设计相应低通滤波器进行误差处理,并基于Tolles-Lawson模型建立仪器转向误差和飞行平台机动误差补偿模型,根据两者结构相似的特点,建立综合补偿模型,该模型简单,实用性强,可通过野外一次补偿测试求取补偿参数进而对工区航磁数据进行补偿处理.最后,将综合补偿研究应用到辽宁省兴城市夹山地区航磁数据,综合补偿后的处理有效去除了航磁数据中的条带状干扰异常,并与地面磁测数据异常形态具有良好的一致性,验证了该研究方法有效性和实用性.更多还原

【Abstract】 The multiple-rotor UAV fluxgate aeromagnetic system can be widely applied in large-scale exploration of mineral resources due to its safety, stability and high efficiency. However, three-axis non orthogonal, sensitivity and zero deviation inconsistency in its sensor can produce steering error. In addition, fixed field interference, induction interference and eddy current interference exist in the system operation, which require to carry out complex calibration and compensation tests. This work found that the electromechanical interference of the aeromagnetic system mainly comes from the high-frequency interference of airborne equipment according to the measured data, and designed a corresponding low-pass filter for filtering such interference according to the high-frequency characteristics of the electromechanical interference. We also developed a simple and practical compensation model based on the Tolles-Lawson model and the characteristics of structure similarity of instrument steering error and flight platform maneuvering error, which can finish the compensation process of aeromagnetic data in the work area, by which a field compensation test can be made to obtain all the compensation parameters. Finally, the comprehensive compensation method was applied to the aeromagnetic data in the Jiashan area of Xingcheng City, Liaoning Province. The strip interference anomalies in aeromagnetic data were effectively removed by the developed method, and the aeromagnetic data after processing was consistent with the anomaly shape of ground magnetic data, which verified the effectiveness and practicability of the new method.更多还原