基于Lyapunov指数谱的转子-机匣系统故障诊断研究  

FAULT DIAGNOSIS OF AN AERO ENGINE ROTOR-CASE SYSTEM BASED ON LYAPUNOV EXPONENT SPECTRUM

作　　者：江龙平[1] 徐可君[1] 秦海勤[1] 

机构地区：[1]海军航空工程学院青岛分院航空机械系,青岛266041

出　　处：《振动与冲击》2007年第5期49-51,共3页Journal of Vibration and Shock

摘　　要：发展了基于Lyapunov指数谱的航空发动机转子-机匣系统故障诊断方法。基于实测的航空发动机机匣振动时间序列求解了系统不同状态的Lyapunov指数谱;基于Lyapunov指数谱,应用最大Lyapunov指数和Lyapunov指数谱图对航空发动机转子-机匣系统进行了故障诊断。研究结果表明:航空发动机机匣振动时间序列在不同状态下具有不同的Lyapunov指数谱,即可以Lyapunov指数谱作为故障诊断的特征量。The method for fault diagnosis of an aero engine rotor-case system is improved based on Lyapunov exponent spectrum.the Lyapunov exponent spectra of different fault conditions of the aero engine rotor-case system are calculated by using the experimental vibration time series which are measured from the aero engine pedestal.Faults are diagnosed on the basis of those Lyapunov exponent spectra.Research shows that Lyapunov exponent spectra,vary with fault conditions of the aero engine,and lyapunov exponent spectrum can be used as the characteristic quantity for aero engine fault diagnosis.This method offers a reliable means for aero engine fault diagnosis and its state monitoring and control.

关 键 词：转子-机匣系统 故障诊断 LYAPUNOV指数谱 

分 类 号：V23[航空宇航科学与技术—航空宇航推进理论与工程] TH165[机械工程—机械制造及自动化]