基于奇异指数的地磁辅助导航路径规划算法  

Flight route planning for geomagnetic aided navigation using a singularity exponent

作　　者：李欣[1] 王德生[1] 孙立国[1] 李世丹[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《哈尔滨工程大学学报》2011年第4期509-512,共4页Journal of Harbin Engineering University

摘　　要：针对地磁场测量信息观测性较差的现状,为了获得较高的辅助导航定位精度和良好的滤波性能,进行了地磁辅助导航路径规划研究.以反映地磁场变化幅度的奇异指数做为地磁场信息量的度量,以点迹总信息量及信息量递增性构建辅助导航路径性能指标.采用粒子滤波算法,对不同路径进行了辅助导航性能仿真对比.仿真结果表明,该算法规划的辅助导航路径比其他路径具有更好的导航定位精度和滤波性能.Geomagnetic navigation precisely obtains positions from geomagnetic field information.In order to obtain precise positions and filter stability,the poor observability of measured geomagnetic data was analyzed,the singularity exponent was used to measure the amount of geomagnetic information,the performance index was built using gross information and increasing factors,and flight route planning for geomagnetic aided navigation was researched using a singularity exponent.Finally,performance was compared using the flight simulation along different routes with a particle filter as the geomagnetic filter algorithm.The simulation results show that aided navigation routing planned using this algorithm has better positioning accuracy,filtering stability,and convergence.

关 键 词：地磁导航 路径规划 多重分形 小波变换 奇异指数 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]