非可靠性测试条件下复杂系统多故障定位方法  

Multiple Fault Location Method for Complex System with Unreliable Tests

作　　者：孙靖杰[1] 赵建军[2] 姚刚[2] 付兴振[1] 

机构地区：[1]海军航空工程学院青岛校区航空军械火控系,青岛266041 [2]海军航空工程学院兵器科学与技术系,烟台264001

出　　处：《振动．测试与诊断》2013年第5期875-880,916,共6页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(60802088;61179017);教育部新世纪优秀人才支持计划资助项目(NCET-05-0912)

摘　　要：针对复杂系统多故障并存且实际测试中存在误警和漏检等特点,提出非可靠性测试条件下多故障定位问题的解决方法。以寻找后验概率最大的故障假设为目标,引入贝叶斯理论并结合系统的检测、误警相关矩阵,将原问题转化为一个组合最优化问题。采用改进的偏转次梯度优化算法(modified reflection subgradient optimization algorithm,简称MRSOA)求解优化问题的拉格朗日对偶,获得故障定位结果。对某型雷达发射机在非可靠性测试情况下的多故障定位结果表明,该方法具有较高的定位效率和定位准确度。Considering that multiple faults usually exist together in a complex system and false alarm or omission may occur during test process,a multiple fault location method for complex system with unreliable tests is proposed.The problem of finding fault hypothesis with maximal posterior probability is transformed into a combinatorial optimization problem by using Bayes theory,the detection dependency matrix and false alarm dependency matrix.The method provides a modified reflection subgradient optimization algorithm(MRSOA)to solve the Lagrange dual of the optimization problem and obtain the fault location result.The result of experiment on multiple fault location for a radar transmitter with unreliable tests demonstrates that the proposed method has high location efficiency and diagnosis accuracy.

关 键 词：非可靠性测试 多故障定位 组合最优化问题 可变目标值 偏转次梯度方向 

分 类 号：TP301[自动化与计算机技术—计算机系统结构] TP306[自动化与计算机技术—计算机科学与技术]