基于多姿态直接算法的磁传感器测量和校正方法研究  

Measurement and Calibration of Magnetometer Based on Multi-Attitude Direct Algorithm

作　　者：吴风喜 华冰[2] 刘海颖[2] 许蕾[2] 

机构地区：[1]南京航空航天大学自动化学院,江苏南京210016 [2]南京航空航天大学航天学院,江苏南京210016

出　　处：《测控技术》2014年第8期1-4,共4页Measurement & Control Technology

基　　金：国家自然科学基金项目(61203188);江苏省自然科学基金项目(BK2011729);中央高校基本科研业务费专项资金资助项目(NS2012128)

摘　　要：根据地磁导航的要求,描述了基于三轴加速度计和三轴磁强计的航向角测量原理,分析了磁强计的误差来源及其对航向角测量的影响,提出了基于多姿态直接计算法。该算法直接利用多个姿态下三轴磁强计输出的各个分量进行误差计算,并进行补偿。同时将此算法与基于最小二乘的24位置误差补偿法进行比较,通过数据仿真,结果表明两种方法均能抑制磁强计误差的影响,航向角的测量精度由2°提高至0.3°。According to the demands for geomagnetic navigation, the principle of determining the heading angle based on three mutually orthogonal accelerometers and magnetometers is introduced. With the analysis of the error sources of magnetometers and their impact on the heading angle measurement, the multi-attitude based direct algorithm is proposed. The algorithm directly utilizes the each output of the tri-axial magnetometer to calculate the error and takes the compensation. Meanwhile, the comparison with the 24-position error compensation method based on least squares is made. Through the data simulation, results show that both methods can inhibit the impact of magnetometer errors, and the measurement accuracy of the heading angle is improved from 2° to 0. 3°.

关 键 词：地磁导航 姿态 航向角 三轴磁强计 误差 

分 类 号：V249.3[航空宇航科学与技术—飞行器设计]