基于集值决策的机载冗余惯导系统状态判决方法  

State decision method based on set value decision system for airborne redundant inertial navigation system

作　　者：程鉴皓 李荣冰 刘刚[2] 刘建业 CHENG Jianhao;LI Rongbing;LIU Gang;LIU Jianye(Navigation Research Center,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China;AVIC Xi’an Flight Automatic Control Research Institute,Xi'an 710076,China)

机构地区：[1]南京航空航天大学导航研究中心,南京211106 [2]航空工业西安飞行自动控制研究所,西安710076

出　　处：《中国惯性技术学报》2022年第4期553-560,共8页Journal of Chinese Inertial Technology

基　　金：国家自然科学基金(62273179)。

摘　　要：针对多套惯导系统冗余配置中,余度管理策略的有效性和完备性难以分析和评估的问题,采用集值信息系统构建机载冗余惯性参考系统状态集值决策系统,为余度管理策略的评估和分析提供理论依据。分析传统机载惯性余度管理策略存在的决策风险,建立包含不确定项的冗余惯性参考系统状态决策系统,并基于各状态隶属度函数评价各子系统状态变化特性,确保决策系统的完备性。开展仿真试验,验证对比两种余度管理策略对三种典型的惯性传感器故障类型的故障识别率。试验结果表明:改进的策略对于典型故障类型中的两种时变故障的识别率,相较于传统策略分别提高了3.9%和6.9%,提高了判决指标接近判别门限时的状态判决准确性。The redundancy configuration with multiple Inertial Navigation System(INS)is a convenient and effective method to ensure the mission reliability and safety in system level.The redundancy management strategy used in practice mostly relies on the engineering experience.The effectiveness and completeness of the traditional strategy are hard to analysis and evaluation.The set value information system is used to build the state decision strategy for airborne redundant INS,which provides the theoretical basis for evaluating and analysing the strategy.The decision risk in traditional strategy is analysed by the set value information system.With concerning the uncertain state due to the risk and evaluate each subsystem through the membership function,the completeness of the decision will be ensured.Through the simulation experiments,the fault recognition rates for three typical fault models of inertial sensors are got from these two different strategies.The results show that,for the two time-varying fault models,the rate of the new strategy are increased by 3.9%and 6.9%respectively than the traditional one.The accuracy of state decision is improved when the decision index approaches the threshold.

关 键 词：惯性导航系统 余度管理 集值决策信息系统 隶属度函数 

分 类 号：U666.1[交通运输工程—船舶及航道工程]