基于SPRT的组合导航故障检测与隔离互辅算法  

Interact Arithmetic of Fault Detection and Isolation Based on SPRT for Integrated Navigation

作　　者：张闯[1] 赵修斌[1] 庞春雷[1] 冯波[1] 仝海波[1] 

机构地区：[1]空军工程大学信息与导航学院,西安710077

出　　处：《火力与指挥控制》2017年第5期68-71,75,共5页Fire Control & Command Control

基　　金：国家自然科学基金资助项目(61273049)

摘　　要：针对SPRT(序贯概率比检验)算法无法准确判断缓变故障结束时间的问题,提出了一种故障检测与隔离互辅算法。采用SPRT算法对滤波残差进行故障检测,确认故障后隔离故障观测量,重新建立卡尔曼滤波观测方程并完成量测更新,将隔离后的滤波结果作为下一时刻的滤波初值辅助故障检测。仿真结果表明,该方法能准确定位故障观测量并判断出故障的结束时间,提高了系统可靠性。The SPRT（Sequential Probability Ratio Test）algorithm can not judge the ending time of gradual changing fault accurately.To solve this problem,a interact arithmetic of fault detection and isolation is proposed.The SPRT algorithm is used to detect the fauh.Afier determining the faulted observed value,it is isolated.Then the kalman filter measurement equation is rebuilded and the measurement update is accomplished.The new filter result is used as the initial estimate of next time to help the fault detection.The simulation results show that this algorithm can determine the faulted observed value and the ending time of the fault, and it can effectively improve the reliability of the integrated navigation system.

关 键 词：组合导航 序贯概率比检验 故障检测与隔离 互辅算法 

分 类 号：U666.1[交通运输工程—船舶及航道工程]