局域波法在船舶柴油机燃油系统故障诊断中应用

Application of local wave method to fuel system fault diagnosis of marine diesel

局域波时频分析能够从振动信号中提取清晰直观的故障特征.根据该方法的优点,以船舶主机——柴油机的燃油系统漏油故障为例,对柴油机缸盖表面的振动信号应用局域波时频谱进行分析,为柴油机的故障诊断提出一种新的分析方法.

It is shown that the clear and visual feature of the fault information can be successfully extracted from the vibration signal by local wave timefrequency analysis method. According to the good quality of timefrequency analysis, taking the leakage of fuel injection system of ship diesel engine as an example, this paper puts forward a new method to diagnose the faults of diesel. The new method applies the local wave timefrequency analysis method to analyze the vibration signal on the cylinder head surface of diesel.