基于交叉小波变换与Teager算子的柴油机燃烧特征增强方法  

Combustion Feature Enhancement in Diesel Engine Based on Cross-wavelet Transform and Teager Energy Operator

作　　者：贾继德[1] 

机构地区：[1]军事交通学院汽车工程系,天津300161

出　　处：《汽车工程》2014年第2期164-167,163,共5页Automotive Engineering

基　　金：总后勤部重点项目(BS311C011)资助

摘　　要：为更有效地对柴油机燃烧进行监测和诊断,提出一种基于交叉小波变换与Teager能量算子的柴油机燃烧特征增强方法。首先利用交叉小波变换对柴油机缸盖振动信号进行时频相干分析,以衰减甚至消除随机噪声干扰,然后进一步采用Teager算子对于柴油机燃烧时频特征进行增强。仿真和实际信号分析结果表明,该方法有助于柴油机燃烧特征的提取和失火故障的诊断。For more effectively conducting the combustion monitoring and fault diagnosis in diesel engine, a combustion feature enhancement method for diesel engine is put forward based on cross-wavelet transform and Teager energy operator. Firstly cross-wavelet transform is adopted to perform time-frequency coherence analysis on the vi- bration signal of cylinder head for attenuating or even eliminating random noise interference. Then, the time-fre- quency feature of diesel engine combustion is enhanced by using Teager energy operator. The results of simulation and real signals analysis show that the method proposed is conducive to combustion feature extraction and misfire fault diagnosis for diesel engine.

关 键 词：柴油机 燃烧 特征增强 交叉小波变换 TEAGER能量算子 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]