Constrained total least-squares calibration of three-axis magnetometer for vehicular applications
Constrained total least-squares calibration of three-axis magnetometer for vehicular applications
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DOI：
10.1088/0957-0233/24/9/095003
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发表时间：
2013-09-01
影响因子：
2.4
通讯作者：
Cao, Juliang
中科院分区：
文献类型：
--
作者：
Wu, Zhitian;Hu, Xiaoping;Cao, Juliang
捷联式三轴磁力计广泛用于确定其所附车辆的航向角。不幸的是，三轴磁力计的输出经常因各种磁场源而失真。因此，在使用前必须执行校准程序。本文提出了一种新的校准算法，用于基于约束总体最小二乘法 (CTLS) 技术确定校准参数。利用牛顿迭代法来确定 CTLS 解。与现有的校准算法不同，所提出的算法无需假设噪声分布的先验知识即可产生有效的估计。因此，它很容易实现并且适合实际应用。仿真和实验结果表明所提算法相对于对比算法的优越性。
Strapdown three-axis magnetometer is widely used to determine the heading angle of a vehicle to which it is attached. Unfortunately, the outputs of three-axis magnetometer are often distorted by various magnetic field sources. Therefore, a calibration procedure must be performed before it is used. This paper presents a new calibration algorithm to determine calibration parameters based on a constrained total least-squares (CTLS) technique. A Newton iteration method is utilized to determine the CTLS solution. Unlike existing calibration algorithms, the proposed algorithm yields efficient estimates without assuming a priori knowledge of the noise distribution. Thus, it is easily implemented and suitable for practical applications. The results of simulations and experiments reveal the superiority of the proposed algorithm to the compared algorithms.