Abstract: The advantage of harmonic wavelet is analyzed. On the basis of research for part decomposition in frequency domain, the expression for harmonic wavelet packets transform on frequency section is put forward. The realizing method of harmonic wavelet packets transform is given out. The ability of harmonic wavelet analysis on arbitrary detail of frequency section is realized. The vibration signal of rotor is analyzed in detail frequency section. The real vibration of high speed rotor is analyzed by harmonic wavelet packets transform. At the same time of obtaining detail spectrum, the orbit of rotor’s sub-frequency signal is accurate obtaining directly. This is difficult in general method. The satisfied results are received. This provides the new method for signal analysis of rotor fault.

Key words: Harmonic wavelet packet, Orbit, Rotor, Sub-frequency