关键词: 故障诊断, 机械, 小波包, 小波分析

Abstract: To understand the wavelet analysis is put forward from engineering application. The relationship between wavelet function and scale function, the wavelet transform and the signal decomposition are given. Furthermore, we take advantage of the algorithm of wavelet packet to analyze two kinds of typical mechanical faults. Results show the wavelet packet is a more efficient method in comparison with windowed fourier transform (WFT) and winger distribution (WD) in the field of machinery diagnosis.

Key words: Fault diagnosis, Machinery Wavelet analysis, Wavelet packet