分组故障检测证据融合多星故障隔离算法.PDFVIP

第xx 卷第x 期 控 制 与 决 策 Vol.xx No.x xxxx 年 x月 Control and Decision xxx.xxxx DOI: 10.13195/j.kzyjc.2017.1570 分组故障检测证据融合多星故障隔离算法 王会宾, 程咏梅 , 樊 伟, 李 松, 苟 斌 ( 西北工业大学自动化学院，西安710129) 摘 要: 针对卫星导航星座数增加导致的多星故障率上升问题，本文提出一种分组故障检测证据融合多星故障 隔离算法。该算法首先将可见星分组并作为证据，利用故障检测量计算每个证据的故障置信指派和正常置信指 派；其次，针对加权分配冲突法融合结果受证据融合次序影响的问题，给出一种基于可靠程度的权值计算方法， 实现加权分配冲突法的多证据融合，并得到当前卫星的单星故障置信指派和正常置信指派信息；最后，利用所 有卫星的单星故障置信指派均值作为故障隔离阈值，实现故障卫星隔离。在GPS/BDS 双星座导航模式下，本文 对算法的分组个数与故障隔离效果关系进行分析，并将其与随机有哪些信誉好的足球投注网站法及置信指数法进行多星故障隔离效果对 比，理论分析与实验结果表明本文算法具有更高准确性。 关键词: 卫星导航系统；故障隔离；多证据融合；加权分配冲突法 中图分类号: TN967.1 文献标志码: A A multi-satellite faults isolation algorithm based on group fault detection andevidences fusion WANGHui-bin, CHENGYong-mei , FANWei, LI Song, GOBin (CollegeofAutomation，NorthwesternPolytechnicalUniversity，Xi’an 710129，China) Abstract: Inallusiontotheincreasedpossibilityofmulti-satellitefaultsresultingfromtheincreaseofnavigationsatellite constellation,amulti-satellitefaultsisolationalgorithmbasedongroupfaultdetectionandevidencesfusionisproposed. Firstly, divide all visible satellites into groups and take each group as an evidence, and calculate the fault and fault-free beliefassignmentofeveryevidencebyfaultdetection. Secondly,areliabilitybasedweightcalculationmethodisproposed torealizethemulti-evidencefusioninweighteddistributionmethod,sothesituationthatfusionresultvarieswithfusion order can be deal with, and the fault and fault-free belief assignment of current satellites can be obtained. Lastly, isolate the fault satellites by taking the mean of all single satellite fault belief assignment as the fault isolation t