The abrupt change informatiom can be obtained through decomposing and reconstruction of the vibrating signal by wavelet packet ; therefore the fault condition of the hydro - generator unit can confirm and provide decision support for diagnosing the vibration fault of the unit 运用小波包分析对振动信号进行分解与重构，可以获得振动信号的突变信息，即可以获得机组振动的故障状况，从而?诊断机组振动的故障状况提供决策支援。
