基于键合图的不确定性混杂系统故障诊断  

Fault diagnosis of uncertain hybrid systems based on bond graph

作　　者：赵佳彬 帕孜来·马合木提[1] Zhao Jiabin;Pazilai Mahemuti(School of Electrical Engineering,Xinjiang University,Urumqi 830047,China)

机构地区：[1]新疆大学电气工程学院,乌鲁木齐830047

出　　处：《电测与仪表》2021年第8期166-171,共6页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(61364010);新疆维吾尔自治区自然科学基金资助项目(2016D01C038)。

摘　　要：在混杂系统故障诊断中,系统的不确定性与外界的干扰导致诊断过程出现大量误报、漏报现象,针对上述问题,提出由混杂系统诊断键合图(HDBG)模型获得系统全局解析冗余关系(GARRs),根据GARRs由正常工作模式下系统参数的不确定性获得自适应阈值,将自适应阈值与模糊方法相结合,实现对不确定性混杂系统参数性故障的故障检测与隔离(FDI)。文章以飞跨电容型三电平逆变器为研究对象,在20-sim软件中进行仿真,仿真结果验证了该方法的可行性和优越性。In the fault diagnosis of hybrid systems,the uncertainty of the system and the interference of the outside world lead to a large number of false positives and false alarms in the diagnosis process.Aiming at the above problems,a global analytical redundancy relationships(GARRs)is obtained by using the hybrid diagnostic bond graph(HDBG)model.According to the GARRs,the adaptive threshold is obtained from the uncertainties of system parameters under normal working mode.Combining the adaptive threshold with the fuzzy method,it realizes the fault detection and isolation(FDI)of parametric faults in uncertain hybrid systems.In this paper,the flying capacitive three-level inverters are studied and simulated in 20-sim software.The simulation results verify the feasibility and superiority of the proposed method.

关 键 词：键合图 不确定性 自适应阈值 故障检测与隔离 

分 类 号：TM464[电气工程—电器]