两点磁梯度张量定位方法  

A Localization Method of Two-point Magnetic Gradient Tensor

作　　者：戴忠华[1] 周穗华[1] 单珊[1] 

机构地区：[1]海军工程大学兵器工程系,湖北武汉430033

出　　处：《探测与控制学报》2018年第1期44-48,共5页Journal of Detection & Control

摘　　要：针对单点磁梯度张量定位方法存在的受地磁影响较大,且定位存在多解性的问题,提出两点磁梯度张量定位方法。该方法基于单点磁张量梯度定位原理,利用运动载体测量系统的连续两点磁梯度张量,结合磁偶极子模型方程,构建两点磁梯度张量非线性目标函数,采用单点定位和POWELL混合优化算法对位置参数进行求解。仿真结果表明,在有地磁干扰的情况下,所提方法与原单点磁梯度定位方法相比受地磁影响小,定位精度较高,测量系统基线大小和磁力仪精度是影响远距离定位精度的主要因素。In the process of magnetic positioning with magnetic gradient tensor,geomagnetism will lead to positioning failure.A two-point magnetic gradient tensor localization method was proposed.based on the principle of single point magnetic tensor gradient localization.A two-point magnetic gradient tensor nonlinear equation was constructed by using the continuous two-point magnetic gradient tensor of motion vector measurement system and the magnetic dipole model equation.A hybrid optimization algorithm combining the single point positioning algorithm and the classical POWELL algorithm were used to determine the optimal position parameter of the objective function.Simulation results showed that the proposed method had high positioning accuracy and is less affected by geomagnetism than the original single-point magnetic gradient localization method.

关 键 词：磁定位 磁梯度张量 目标函数 混合优化算法 

分 类 号：TP212.13[自动化与计算机技术—检测技术与自动化装置]