传感技术学报2017，Vol.30Issue(10)：1512-1517,6.DOI:10.3969/j.issn.1004-1699.2017.10.010
基于模值估计的三轴磁力计标定方法研究
Research on Calibration Methods of Three-Axis Magnetometer Based on Vector Norm Estimation
摘要
Abstract
In view of calibration methods of three-axis magnetometer, most calibration methodsuse the normalized magnetic field vector to calibrate three-axis magnetometer. In order to improve the generality and effectiveness of calibration methods,a two-step calibration method is proposed. In this work,the error model of three-axis magnetom-eter uses the magnetic field vector norm as a parameter. First step is used to get the initial parameters,then second step is used to solve nonlinear least squares problem with the initial parameters. Simulation results show that two-step calibration method can improve the convergence of Levenberg-Marquardt method. This method does not depend on the observed vector,and is also applicable to other three-axis sensors with the same error model. And experiment results show that this method can correctly and effectively compensate the misalignment errors,null shift errors and sensitivity errors of the three-axis magnetometer. And the magnetic field vector norm is relatively precise.关键词
三轴磁力计/误差分析/两步标定方法/Levenberg-Marquardt方法Key words
three-axis magnetometer/error analysis/two-step calibration method/Levenberg-Marquardt method分类
航空航天引用本文复制引用
钟浩,章卫国,刘小雄..基于模值估计的三轴磁力计标定方法研究[J].传感技术学报,2017,30(10):1512-1517,6.基金项目
国家自然科学基金项目(61374032) （61374032）
航空科学基金项目(20150753009) （20150753009）
