CAJ | 학술논문

在直升机航空电磁测量时,固定在吊舱内的发射-接收线圈受飞行速度、飞机颠簸、风向等影响,会发生旋转,导致线圈与大地之间的耦合发生变化,给测最的电磁数据带来姿态误差,因此,研究航空线圈姿态校正非常重要.本文在建立吊舱和大地系统双坐标系的基础上,确定了吊舱旋转时,双坐标系之间变量变换的旋转矩阵,推导出层状大地垂直圆线圈姿态变化时航空电磁响应的计算表达式,以及线圈发生摇摆、俯仰旋转时的电磁响应系数,仿真研究了线圈姿态变化对电磁测量的影响,提出了姿态误差的几何校正方法,为航空电磁测量数据的精确处理和解释奠定了理论基础.
재직승궤항공전자측량시,고정재조창내적발사-접수선권수비행속도、비궤전파、풍향등영향,회발생선전,도치선권여대지지간적우합발생변화,급측최적전자수거대래자태오차,인차,연구항공선권자태교정비상중요.본문재건립조창화대지계통쌍좌표계적기출상,학정료조창선전시,쌍좌표계지간변량변환적선전구진,추도출층상대지수직원선권자태변화시항공전자향응적계산표체식,이급선권발생요파、부앙선전시적전자향응계수,방진연구료선권자태변화대전자측량적영향,제출료자태오차적궤하교정방법,위항공전자측량수거적정학처리화해석전정료이론기출.
During the helicopter time electromagnetic (TEM) survey, transmitting and receiving coils fixed in the bird can be rotated by flight speed, bumpy, wind direction, etc. Meanwhile, the coupling change between coils and earth causes the attitude error to TEM survey data, so it's crucial to study a correction algorithm of the coils attitude. Based on building up the bird and earth bi-coordinate system, we determine the rotation matrix of variable transform in the bicoordinate system, deduce the calculation expression of airborne TEM response while the vertical circle-coils attitude of layered earth is changing, and obtain the coefficients of TEM response for the rolled and pitched coils. Through simulating the changing coils attitude corresponding to the TEM survey effect, we propose a geometric algorithm for the attitude error correction, which is the foundation for accurate processing and interpretation airborne TEM data.