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基于不敏粒子滤波的水中非合作磁性目标实时磁定位方法
A real-time magnetic lo calization metho d of underwater non-co op erative magnetic targets based on unscented particle filter
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摘要: 针对水中非合作磁性目标的实时定位问题,提出了一种基于不敏粒子滤波(unscented particle filter, UPF)的实时磁定位方法。从非合作磁性目标的运动特征出发,建立了状态空间模型,利用UPF算法对目标状态进行实时估计。为了提高系统的可观测性,在算法迭代过程中对粒子状态进行约束及利用最小二乘法反演磁矩。仿真与铁磁物体定位实验结果表明,该方法的定位精度较高,实时定位效果较好,可用于近场实时磁定位问题中。Abstract: A real-time magnetic localization method based on unscented particle filter (UPF) is proposed to solve the problem for real-time localization of underwater non-cooperative magnetic targets. The state space model of non-cooperative magnetic targets is set up according to its motion characteristic, and the state is estimated in real time by UPF. In order to improve the observability of the system, the particle state is constrained and magnetic moment is inverted by the least square method. The simulation results and ferromagnetic object localization experimental results show that the method is good in localization precision and real-time performance, which can be applied to the real-time magnetic localization in near field.
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