航空发动机滑油系统建模及测试性分析  

Modeling and Testing Analysis of Aviation Engine Lubricating Oil System

作　　者：张航源 蔡景[1] ZHANG Hangyuan;CAI Jing(College of Civil Aviation,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China)

机构地区：[1]南京航空航天大学民航学院,南京211106

出　　处：《计算机测量与控制》2024年第12期43-49,共7页Computer Measurement &Control

摘　　要：针对日常维修中滑油系统不易到达且重要度高的特点,开展基于仿真模型的滑油系统测试性分析,优化滑油系统诊断策略;基于全流量单回路反向循环滑油系统的工作原理,使用AMESim软件建立滑油系统的虚拟仿真模型,并利用Simulink模型仿真结果验证所建AMESim模型的准确性,误差在3.5%以内;建立了滑油系统基本故障事件的贝叶斯网络,分析滑油系统的五大故障模式,用于确定滑油系统重要故障事件,作为开展仿真模型故障注入研究的基础;在模型中实现故障注入,通过分析预置测试点参数的变化,得到故障-测试相关性矩阵,实现滑油系统测试性分析和优化,优化后故障检测率提高了16.7%,故障隔离率提高了40.0%;可以利用测试性分析的结果,优化滑油系统传感器布局设计,为滑油系统的故障诊断提供支撑。Lubricating oil system has the characteristics of difficulty to reach and high importance in daily maintenance.Based on this,a test analysis of lubricating oil system based on a simulation model was conducted,and the diagnostic strategy of the lubricating oil system was optimized.Based on the working principle of the full-flow single-loop reverse circulation lubricating oil system,a virtual simulation model of the oil system was established by using AMESim software,and the accuracy of the built AMESim model was verified by using simulation results on Simulink model,with an error of within 3.5%.The Bayesian network with basic fault events of the lubricating oil system was established to analyze the five important fault modes of the lubricating oil system,which was used to determine important fault events of the lubricating oil system as the research basics on fault injection in simulation models.Fault injection was implemented in the model,and by analyzing the changes in preset test point parameters,the fault-test correlation matrix was obtained to achieve the test analysis and optimization of the lubricating oil system.After optimization,the fault detection rate was increased by 16.7%,and the fault isolation rate by 40.0%.The test results can be used to optimize the sensor layout design of the lubricating oil system and provide a support for fault diagnosis of the lubricating oil system.

关 键 词：滑油系统建模 AMESIM 贝叶斯网络 测试性分析 测试性指标 故障-测试相关性矩阵 

分 类 号：TP206.1[自动化与计算机技术—检测技术与自动化装置]