微型平台组合导航信息分配新方法  

Novel information-sharing method in micro-platform integrated navigation system

作　　者：王浩[1] 段凤阳[1] 孙百香[1] 郭伟[1] 

机构地区：[1]空军航空大学,吉林长春130033

出　　处：《光学精密工程》2008年第5期802-808,共7页Optics and Precision Engineering

基　　金：国防十一五预研基金资助项目(No.623010107)

摘　　要：在分析信息分配方法的基础上,针对微型平台组合导航系统,提出了一种新的信息分配方法。利用阈值构造了故障概率计算公式,按照各个子系统故障概率进行信息分配。设计了IMU、GPS、ADS及超声波构成的组合导航系统,在新的信息分配方法下进行仿真。实验结果表明,应用该方法后,组合系统稳态精度为:俯仰角0.4 mrad、横滚角0.5mrad、东向速度精度可达0.6 m/s;在子系统出现故障时能有效提高系统的容错性能,并改善导航精度;同时,采用在线调整阈值的方法能够很好地降低误报率和漏报率。After analyzing traditional information sharing methods, a novel information sharing method based on micro-platform integrated navigation system was proposed. A formula of failure probability was constructed using the threshold value ,and the information factor for each local filter was adjusted according to the failure probability of the subsystem. Meanwhile, the adjusting method for the threshold value on line can reduce the probability of false alarm and missing alarm in the Failure Diagnosis and Isolation（FDI） process. The simulation result proves that the new algorithm can reduce the inertial navigation errors to the pitch-angle error of 0.4 mrad, the roll-angle error of 0.5 mrad and the east-velocity error of 0.6 m/s. The simulation experiment also shows that this method can effectively reduce the computation load and can improve the precision of integrated navigation system.

关 键 词：组合导航 信息分配 联邦滤波 故障检测 

分 类 号：V241.6[航空宇航科学与技术—飞行器设计] U666.1[交通运输工程—船舶及航道工程]