进气压力调节执行机构故障诊断方法研究  

Fault Diagnosis Method of Intake Pressure Regulating Actuator

作　　者：但志宏 张松 王彬[2] 常睿 刘威 DAN Zhi-hong;ZHANG Song;WANG Bin;CHANG Rui;LIU Wei(Science and Technology on Altitude Simulation Laboratory,AECC Sichuan Gas Turbine Establishment,Mianyang 621703,China;College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]中国航发四川燃气涡轮研究院高空模拟技术重点实验室,四川绵阳621703 [2]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《推进技术》2023年第12期164-173,共10页Journal of Propulsion Technology

基　　金：中国航发四川燃气涡轮研究院稳定支持项目(GJCZ-0039-20)。

摘　　要：面向高空台进气压力调节系统试验和维护需求,提出了一种基于滑模观测器的执行机构故障诊断方法。考虑特种调节阀的流量-压差气动特性对执行机构外负载作用机制,建立了电液伺服执行机构的非线性模型。由其识别出最佳估计数学模型,以获得自适应滑模观测器。分析确定不同故障对应伺服阀或液压缸的主导特征参数,据此选择可观测状态量且结合自适应阈值进行判断某部件是否发生故障,仿真验证该观测器对典型故障的诊断效果。结果表明,基于自适应滑模观测器的故障诊断方法可实现对进气压力调节系统中电液伺服执行机构典型液压、机械、电气故障的诊断和定位,诊断准确率达91%以上。A fault diagnosis method of actuator based on sliding mode observer is proposed to meet the test and maintenance requirements of intake pressure regulating system of high altitude platform.Considering aerody⁃namic characteristics of flow-pressure difference across the special valve on external load mechanism of the actua⁃tor,the nonlinear model of the electro-hydraulic servo actuator is established.The best estimation model is iden⁃tified based on the nonlinear model,so as to obtain an adaptive sliding mode observer.The dominant characteris⁃tic parameters of the servovalve or the hydraulic cylinder for different faults are analyzed and determined.Accord⁃ingly,the observable state parameters are selected to decide whether one component has a fault or not by compar⁃ing with the adaptive threshold.Simulation demonstrator verifies diagnostic effect on typical faults using this ob⁃server proposed in this paper.The results show that the fault diagnosis method based on adaptive sliding mode ob⁃server can realize the diagnosis and location of typical hydraulic,mechanical and electrical faults in electro-hy⁃draulic servo actuator of the intake pressure regulating system of high altitude platform,and the diagnosis accuracy is no lower than 91%.

关 键 词：进气压力调节系统 特种调节阀 电液伺服执行机构 自适应滑模观测器 故障诊断 

分 类 号：V263.3[航空宇航科学与技术—航空宇航制造工程]