一种改进的残差χ^(2)故障检测算法  

An improved fault detection algorithm based on residual chi-square

作　　者：徐峰[1] 阎磊 傅金琳[3,4] XU Feng;YAN Lei;FU Jin-lin(China Ship Research and Design Center,Wuhan 430064,China;School of Electronic Information Engineering,Tianjin Vocational Institute,Tianjin 300410,China;Tianjin Navigation Instnnnents Research Institute,Tianjin 300131,China;Laboratory of Science and Technology on Marine Navigation and Control,CSSC,Tianjin 300131,China)

机构地区：[1]中国舰船研究设计中心,湖北武汉430064 [2]天津职业大学电子信息工程学院,天津300410 [3]天津航海仪器研究所,天津300131 [4]中国船舶集团航海保障技术实验室,天津300131

出　　处：《舰船科学技术》2022年第13期144-148,共5页Ship Science and Technology

基　　金：中国船舶集团预研项目(KJW202016)。

摘　　要：针对舰船导航系统多源信息融合中故障检测问题,提出一种改进的残差χ^(2)检测算法。该算法克服了传统残差χ^(2)检测算法对门限设置敏感的缺点,通过适当的递推与合理的状态切换,使得改进χ^(2)检测算法受设置门限的影响大大降低,采用一定范围内的门限可达到相同效果,即可采用较宽泛的门限,有利于工程应用设计。仿真结果表明,改进算法相比传统算法能够在精度、稳定度和最大误差值3个方面获得较大改善,将位置误差降低到传统算法位置误差的18%,位置误差波动性降低至传统算法的14%,最大位置误差降低至传统算法的13%。Aiming at the problem of fault detection in multi-source information fusion of navigation system, an improved detection algorithm base on residual chi-square is proposed. The proposed algorithm overcomes the disadvantage of the traditional residual detection algorithm base on residual chi-square that is sensitive to threshold setting. Through appropriate recursion and reasonable state switching. The influence of threshold setting on the improved detection algorithm is greatly reduced. Using a certain range of threshold can achieve the same effect, that is, a wider threshold can be used, which is very conducive to engineering application design. The simulation results show that the improved algorithm can greatly improve the accuracy, stability and maximum error compared with the traditional algorithm. The position error is reduced to18% of the position error of the traditional algorithm, the fluctuation of position error is reduced to 14% of the traditional algorithm, and the maximum position error is reduced to 13% of the traditional algorithm.

关 键 词：故障检测 门限设置 多源信息融合 工程应用 

分 类 号：TN965[电子电信—信号与信息处理]