测控技术2017，Vol.36Issue(4)：153-158,6.
航空发动机MIMO系统的闭环辨识与故障诊断算法
Estimation and Fault Diagnosis Algorithm for Closed-Loop MIMO Aero-Engine Systems
摘要
Abstract
Aero-engines have characteristics with complex structure and prone to fault,in addition,conventional modeling methods based on mechanism analysis have troubles of complicated process and low operational efficiency.To solve these problems,an algorithm is proposed for parameter identification and fault diagnosis based on data,which could be used in closed-loop MIMO(multiple-input multiple-output) aero-engine systems.By choosing appropriate auxiliary parameters,auxiliary models are established.Then time delay is calculated by determining the order of the auxiliary model,parameters of forward channels and feedback channels are identified by multi-stage least square algorithm.An example of biaxial gas turbine engine system is given for certification.It shows that the algorithm could be used for diagnosing gas path fault when the forgetting factor is changing by convergence of recognition result.Finally,two kinds of important characteristics are introduced,about importance and principium of selecting forgetting factor and excluding disturbance of noises by distinguishing it from the fault result.关键词
航空发动机/MIMO系统/闭环辨识/故障诊断/最小二乘/辅助模型Key words
aero-engine/MIMO system/closed-loop identification/fault diagnosis/least square/auxiliary model分类
航空航天引用本文复制引用
任佳,马宏军..航空发动机MIMO系统的闭环辨识与故障诊断算法[J].测控技术,2017,36(4):153-158,6.基金项目
国家自然科学基金面上项目(61473067) （61473067）
