基于磁梯度张量的目标多测量点线性定位方法

发布时间：2018-03-29 02:12

  本文选题：磁梯度张量　切入点：不变量　出处：《探测与控制学报》2017年05期

【摘要】：针对目前基于磁梯度张量的目标多测量点定位方法中存在求解过程复杂且无法得到解析最优解的问题,提出了基于磁梯度张量的目标多测量点线性定位方法。该方法将磁梯度张量的三个特征值按照一定关系组合得到一个与磁偶极子方向无关的不变量,同时利用绝对值最小的特征值对应的特征向量与距离矢量垂直的几何关系,通过运动载体平台的运动测量得到三个点的磁梯度张量数据,建立关于磁性目标位置的超定方程组,通过求广义逆得到目标位置的最小二乘解。仿真实验验证表明,多测量点线性定位方法对磁性目标的定位效果较好,可以实现对磁性目标的精确定位,且磁力仪的测量精度、测量系统的基线距离和运载平台的位移测量误差是影响定位精度的主要因素。
[Abstract]:In view of the problem of complex solving process and unable to obtain the analytical optimal solution in the current multi-measurement point location method based on magnetic gradient Zhang Liang, In this paper, a method based on magnetic gradient Zhang Liang is proposed, which combines three eigenvalues of the magnetic gradient Zhang Liang into a invariant independent of the direction of the magnetic dipole, which is independent of the direction of the magnetic dipole. At the same time, using the geometric relationship between the eigenvector corresponding to the minimum eigenvalue of absolute value and the distance vector, the magnetic gradient Zhang Liang data of three points are obtained by the motion measurement of the motion carrier platform, and the overdetermined equations about the location of the magnetic target are established. By solving the generalized inverse, the least square solution of the target position is obtained. The simulation results show that the linear location method with multiple measurement points has a good effect on the magnetic target location, and the precision of the magnetometer can be achieved by the precise location of the magnetic target. The baseline distance of the measuring system and the displacement measurement error of the carrier platform are the main factors affecting the positioning accuracy.
【作者单位】： 海军航空工程学院;海军潜艇学院遥感所;
【基金】：国家863高技术研究发展计划项目资助(2015AA0922)
【分类号】：P318;P631.2
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本文编号：1679089