基于谐波窗方法的转子轴心轨迹提纯

轴心轨迹是旋转机械转子振动信号时域分析的重要内容之一，不同的轴心轨迹反映出不同的转子运动状态或故障的基本信息。在深入研究谐波小波盒形频谱特性的基础上，采用了不分层分析的谐波窗方法来提纯轴心轨迹。该方法实现了真正意义上的信号任意频段的任意细化，可以将感兴趣的频段提取出来，然后进行时域重构，就能得到提纯的轴心轨迹。文中对小型转子试验台轴心轨迹的成功提纯验证了该方法的有效性。该方法具备算法简单，易于现场采用等优点，为转子故障信号的分析创造了条件。

Harmonic window method for purification of axis trace

Axis trace is an important content for vibration signal analysis in time domain of rotating machinery; different axis trace expresses different operating condition or basic fault information for rotor. On the base of deep research box-like spectrum feature of harmonic wavelet, a new method that need not decomposition to purify the axis trace was proposed by using the harmonic window method. With this method, the signal could be decomposed into any frequency band, and then the interested frequency band could be abstracted and reconstructed in time domain, so the purification of axis trace was completed. The effectiveness of this method has been proved by the successful purification of axis trace coming from the test-bed. This method has simple algorithm and easy on-site application; it provides a new method for signal analysis of rotor fault.