基于Hilbert-Huang变换的柴油机气门漏气故障诊断研究

Fault diagnosis of diesel engine valve leakage based on hilbert-huang transform

分析柴油机漏气故障的振动诊断机理,阐明Hilbert谱与傅里叶谱的区别,通过引入Hilbert-Huang变换这种新的时频分析方法成功诊断了气门漏气故障。

Vibration mechanism of diagnosis of valve leakage was studied in this paper; the distinction between Hilbert spectrum and Fourier spectrum is clarified ; valve leakage fault is successfully diagnosed by using a new time-frequency analyzing method-Hilbert-Huang transform, which give a prospect application for fault diagnosis of diesel engine.