CAJ | 학술논문

针对由三轴GMR磁传感器构建的飞行体姿态测量系统，推导出地磁场与姿态角间的数学关系，分析了影响测量精度的因素。通过对比绝对最小二乘法和相对最小二乘法对磁传感器参数的修正结果，发现由于常规最小二乘法只考虑单一因素，导致由测量数据求出的磁场三分量和总磁场值仍存在较大的波动和误差。为解决这一问题，采用全最小二乘法对磁传感器参数进行整体修正。经无磁转台试验表明，该方法极大地提高了磁场和姿态角的测量精度。
침대유삼축GMR자전감기구건적비행체자태측량계통，추도출지자장여자태각간적수학관계，분석료영향측량정도적인소。통과대비절대최소이승법화상대최소이승법대자전감기삼수적수정결과，발현유우상규최소이승법지고필단일인소，도치유측량수거구출적자장삼분량화총자장치잉존재교대적파동화오차。위해결저일문제，채용전최소이승법대자전감기삼수진행정체수정。경무자전태시험표명，해방법겁대지제고료자장화자태각적측량정도。
In accordance with the measuring system established by 3-axes GMR magnetic sensor for attitude of flight body, the mathematical relationship between geomagnetic field and attitude angle is derived, and the factors affecting the measurement accuracy are analysed. Through comparing the corrected results for parameters of magnetic sensor by using absolute least squares method and relative least squares method, it is found that because the conventional least squares method only considers the single factor, larger fluctuation and error exist in the three-component of magnetic filed and the total magnetic field value. In order to solve this problem, overall correction is conducted to the parameters of magnetic sensor by adopting the total least squares method. The experiments on non-magnetic turntable prove that this method improves the measurement accuracy of magnetic field and attitude angle.