云闪空间定位的三维网格搜索算法研究  

Intracloud Lightning Location Based on 3D Grid Search Algorithm

作　　者：杨惠珍[1,2] 赵文光[1,2] 张萍[3] 张瑞芳[3] 

机构地区：[1]华中科技大学土木工程与力学学院,武汉市珞喻路1037号430074 [2]华中科技大学控制结构湖北省重点实验室,武汉市珞喻路1037号430074 [3]华中科技大学建筑与城市规划学院,武汉市珞喻路1037号430074

出　　处：《武汉大学学报（信息科学版）》2013年第3期370-373,共4页Geomatics and Information Science of Wuhan University

基　　金："十一五"国家科技支撑计划重点资助项目(2008BAC36B00);湖北省自然科学基金资助项目(2011CDB287);中央高校基本科研业务费专项资金资助项目(2012QN160)

摘　　要：针对迭代算法用于雷电定位时依赖初始值和易于发散等问题,提出了三维网格搜索算法用于云闪空间定位解算。通过对某雷电探测网的数据进行模拟计算和数值分析,结果表明,只要网格划分得合理和恰当,多级搜索后,计算结果必定趋近于真实解,证明了该方法的有效性和稳健性。Due to the iterative algorithm exists depending on initial value and easily divergent for lightning location, we propose a three-dimensional grid search algorithm using for positioning and calculating of intracioud lightning . The procedure of the three-dimensional grid search algorithm to find the lightning location is introduced. The lightning space range is defined according to the prior condition. Through dividing space grid reasonably and using multi-level grid search strategy to calculate the cost function value of each mesh point, the most appropriate solution of the cost function is the maximum likelihood estimator of lightning position. The validity and stability of this method is confirmed by the simulation and numerical analysis of a lightning detection network data. When the grid is divided reasonably and properly, the results must be close to the true solution after multilevel searching.

关 键 词：雷电定位 云闪 到达时间 三维网格搜索 代价函数 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]