摘要
控制图是一种成熟的突变点检测方法,在全球卫星导航系统坐标序列异常数据检测中得到了广泛的应用。采用3种使用较为广泛的控制图,分别为累计和控制图、休哈特控制图以及指数加权移动平均控制图,通过在GNSS异常数据中加入不同倍数的标准差偏移量进行实验,并进行比较分析。结果表明,CUSUM控制图对于3倍以下标准差偏移量具有较高的准确性,其次是EWMA控制图,但CUSUM控制图最小只能检测到0.5倍的偏移值。对于3倍以上的标准差偏移量,Shewhart控制图和EWMA控制图有类似的效果,而CUSUM控制图会随着偏移量的增大而导致误判的增大。
Control charts are a mature method for detecting mutation points and have been widely used in the detection of anomalous data of coordinate sequences in the Global Navigation Satellite System(GNSS).The article adopts three kinds of widely used control charts,namely cumulative sum control charts,Shewhart control charts,and exponential weighted moving average control charts.Mainly by adding different multiples of standard deviation offsets to GNSS anomaly data for experimentation and comparative analysis,the results show that the CUSUM control charts have higher accuracy for standard deviation offsets of less than 3 times,followed by the EWMA control charts,but the CUSUM control charts can only detect an offset of 0.5 times at minimum.For standard deviation offsets above 3 times,Shewhart and EWMA control charts have similar results,while CUSUM control charts lead to an increase in false positives with increasing offsets.
作者
何序归
刘超
董亮
孙健飞
樊亚
刘佳祥
HE Xugui;LIU Chao;DONG Liang;SUN Jianfei;FAN Ya;LIU Jiaxiang(School of Spatial Information and Geomatics Engineering,Anhui University of Science and Technology,232001,Huainan,Anhui,PRC;The Sixth Geological Brigade of Jiangsu Bureau of Geology and Minerals,222000,Lianyungang,Jiangsu,PRC;China Building Materials Industry Geologic Exploration Center Guizhou Groups,550009,Guiyang,PRC)
出处
《江西科学》
2024年第2期360-365,共6页
Jiangxi Science
基金
安徽省高等学校科学研究重点项目(2022AH050849)。
