基于加权虚拟力的无线传感器网络定位算法  

Research on Weighted Virtual Force Localization Algorithm for Wireless Sensor Network

作　　者：李婧[1,2] 李艳萍[1] 王华奎[1] 萧宝瑾[1] 王甜甜[1] 

机构地区：[1]太原理工大学信息工程学院,太原030024 [2]山西职业技术学院电子信息工程系,太原030006

出　　处：《太原理工大学学报》2014年第3期334-338,共5页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目(61271249)

摘　　要：针对AHLos算法容易出现误差累积的缺陷,基于邻居信标节点对未知节点的虚拟力,提出了加权虚拟力无线传感器网络定位算法。在虚拟力的作用下,未知节点从估计位置向真实位置移动;与此同时,使用加权因子,对在定位过程中具有不同可信度的信标节点加以区分;最后通过根据精度要求所设定的虚拟力门限值确定最终估计位置。仿真实验结果表明:所提出的新算法较之与AHLos算法,定位精度有所提高。Based on the virtual force produced by the neighbor beacons to the unknown nodes, the weighted virtual force localization algorithm for wireless sensor network is proposed in this paper to avoid the error accumulation in AHLos algorithm. Under the function of the virtual force, the unknown nodes move from the estimated position to the actual position; at the same time, the weighted factor is used to distinguish the different degrees of confidence of beacon nodes in the process of localization; finally, the virtual force threshold ,which is determined according to accuracy requirements, is used for determining the final position estimate. The simulation results show that; the proposed algorithm has better performances of positioning accuracy than the AHLos algorithm.

关 键 词：无线传感器网络 AHLos 定位 加权 虚拟力 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置] TN929.5[自动化与计算机技术—控制科学与工程]