基于小波包变换的柴油机燃油喷射系统故障诊断

Fault Diagnosis of Diesel Fuel Injection System Based on Wavelet Packet Transform

本文在介绍了小波包变换理论后,利用小波包变换对柴油机燃油喷射系统的常见故障进行了分析,并和傅立叶变换进行了比较,证明了前者比后者能提取更多的关于柴油机工作状态的特征信息。

This paper analyzed the common faults of diesel fuel injection system with wavelet packet transform and compared it with traditional Fourier transform. It was proved that wavelet packet transform could extract more feature information of diesel engine operating condition than that with traditional Fourier transform.