摘要
针对地磁测量计算姿态角时容易受到测量环境干扰的问题,分析并建立了完整的磁测量数学模型,通过简化该模型,得出磁测量输出轨迹为椭球面分布,并利用最小二乘椭球参数拟合的方法,完成了基于椭球面分布的磁修正椭球参数估计.通过试验分析,基于椭球参数拟合修正方法的测量误差小于2%,有效地修正了测量环境及传感器本身带来的测量误差.
The measurement environment interferes with attitude angle measured by geomagnetism. Aiming at this problem, an integrated mathematical model of magnetic- measurement was analyzed and established. By simplifying the mathematical model, the outputtrajectory of magnetic measurement is ellipsoidal distribution. By using th of ellipsoid parameters based on least squares, the magnetic-correction elli estimated based on the ellipsoid distribution. Through the experimental e curve-fitting method psoid-parameters analysis, measure were menterror of the correction method based on the ellipsoid-parameters curve-fitting is less than 2 %. The measurement error affected by the environment and caused by sensor itself iseffectively corrected.
出处
《弹道学报》
EI
CSCD
北大核心
2012年第2期46-49,共4页
Journal of Ballistics
基金
南京理工大学自主科研专项计划基金项目(ZDJH02)
关键词
磁传感器
磁干扰
椭球拟合
校准
magnetic sensor
magnetic interference
ellipsoid fitting
calibration
