航空频率域电磁法中姿态旋转不变量的姿态校正算法

发布时间：2018-08-15 17:54

【摘要】：基于磁偶极子的航空频率域电磁法仪器在飞行探测的过程中,由于吊舱姿态角的变化,使得收发线圈与大地之间的耦合发生变化,从而产生姿态误差。根据误差来源的不同,可以将姿态误差分为方向误差与位置误差两种。为了消除姿态误差的影响,基于层状大地模型,首先推导得到三轴发射、三轴接收线圈架构下的电磁张量姿态旋转不变量,再基于重叠偶极子模型,推导得到吊舱翻滚角及俯仰角的余弦值,进而实现不变量位置误差的校正。与传统的姿态校正算法相比,不变量的姿态误差校正算法无需测量吊舱的姿态角信息。由仿真结果可知,不变量的姿态校正算法可以实现传统姿态校正算法在3种常用线圈架构中的校正效果;在常见的H型与K型三层大地模型下,校正后不变量的相对误差小于0.1%,从而验证了不变量姿态校正算法的可行性。
[Abstract]:In the course of flight detection of aeronautical frequency domain electromagnetic instrument based on magnetic dipole, the coupling between the receiving and receiving coil and the earth is changed due to the change of the podded attitude angle, resulting in the attitude error. According to the difference of error source, attitude error can be divided into direction error and position error. In order to eliminate the influence of attitude error, based on the layered geodetic model, the electromagnetic Zhang Liang attitude rotation invariants under the framework of three-axis transmitting and three-axis receiving coils are first derived, and then based on the overlapping dipole model. The cosine values of the roll angle and pitch angle of the pod are derived, and the correction of the invariant position error is realized. Compared with the traditional attitude correction algorithm, the attitude error correction algorithm of invariant does not need to measure the attitude angle information of the pods. The simulation results show that the invariant attitude correction algorithm can realize the correction effect of the traditional attitude correction algorithm in three kinds of commonly used coil structures, and under the common H-type and K-type three-layer geodetic models, The relative error of the corrected invariant is less than 0.1, which verifies the feasibility of the invariant attitude correction algorithm.
【作者单位】：中国科学院电磁辐射与探测技术重点实验室;中国科学院大学;中国科学院电子学研究所;
【基金】：国家重大科研装备研制项目(ZDYZ2012-1-03-05)~~
【分类号】：P631.326

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