摘要
针对手持式MEMS磁力计使用过程中航向精度低的问题,在分析磁力计误差的基础上,建立了罗差校正模型,推导了罗差系数的计算公式,采用椭圆假设、约束最小二乘法、解卷绕和滑动窗口滤波等方法降低磁力计航向误差。该校正过程简单方便,只需手持MEMS传感器组旋转一周。实验结果表明,该校正方法具有良好的抗噪声性能,校正后的磁力计航向精度优于1°。
Due to the limitation of heading accuracy in Hand-held MEMS magnetometer,a magnetometer error model was established to improve its accuracy,which is based on the analysis of magnetometer error,meanwhile,the formula of magnetic deviation coefficient was deduced. Some methods of dealing with the data,which included elliptic assumption,least square method,unwrapping and smoothing window filter,were adopted to reduce the heading error of magnetometer. The experiment shows that the operation is simple. Just holding a set of MEMS sensor and rotating it around the whole operation is completed. This method is of stronger anti-noise ability,whose corrected accuracy of heading angle is better than 1°.
作者
李思民
蔡成林
王亚娜
曹振强
LI Simin, CAI Chenglin , WANG Yana, CAO Zhenqiang(Institute of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, Chin)
出处
《电子器件》
CAS
北大核心
2017年第5期1191-1195,共5页
Chinese Journal of Electron Devices
基金
空天无源探测平台的差分定位体制研究项目(612630028)
关键词
MEMS传感器
罗差校正
椭圆拟合
磁力计
最小二乘法
MEMS sensor
magnetic deviation calibration
ellipse fitting method
magnetometer
leastsquares method