基于Shewhart控制图的完好性监测算法  

An Integrity Monitoring Algorithm Based on Shewhart Control Chart

作　　者：杨磊军 郭承军[1,2] 张顺生[1,2] 

机构地区：[1]电子科技大学电子科学技术研究院 [2]综合电子系统教育部重点实验室,成都611731

出　　处：《科学技术与工程》2014年第16期67-71,77,共6页Science Technology and Engineering

基　　金：国家自然科学基金资助项目(61301052)资助

摘　　要：Galileo系统完好性处理中,通常假设空间信号误差(SISE)服从零均值的高斯分布,以理想状态处理,但在实际情况中该假设很难满足。首先阐述了SISE的概念与统计方法,以IGS提供的数据为基础,分析了2012年8月26日的SISE分布状况;然后针对非零均值模型的SISE完好性监测,将统计过程控制引入完好性监测中,提出了一种基于Shewhart控制图的完好性监测算法,并与最小方差法进行对比。仿真结果表明,所提算法比最小方差法监测性能更优。In the Galileo integrity process, Signal In Space Error is generally assumed subject to zero-mean Gaussian distribution. But this assumption is not entirely satisfied in practice. This paper firstly shows the current research progress and elaborates SISE concepts and statistical methods. Then, based on IGS products, SISE distribution on August 26, 2012 is analyzed. Finally, an integrity monitoring method is processed based on Shewhart control chart. Through the simulation analysis, comparing with least square method, monitoring performance of Shewhart control chart has better monitoring performance than least square method.

关 键 词：卫星导航 空间信号 SHEWHART 完好性 

分 类 号：TN96[电子电信—信号与信息处理]