应用广义谐波小波提纯转子轴心轨迹

Purification of Axis Orbit of Rotor with Generalized Harmonic Wavelet

将二进谐波小波推广到广义谐波小波后,能够对信号的任意频段进行分析,且能够保证信号经过广义谐波小波变换后其频率分辨率保持不变。利用广义谐波小波的这一优点,对某一或某几个频段进行细化分析。利用广义谐波小波对某试验台具有不平衡故障的转子轴心轨迹信号进行谐波小波滤波,提纯后的轴心轨迹呈椭圆形,这与转子不平衡故障状态相符。应用实例说明,广义谐波小波有良好的滤波效果。

The generalized harmonic wavelet can analyze signals in random frequency band,and ensure the frequency resolution unchangingly by a generalized harmonic wavelet transformation.The axis orbit is very important in fault diagnosis of rotors.By applying generalized harmonic,the unbalanced axis orbit of the rotor on some test-bed is filtered,the purified axis orbit is obvious ellipse,its characteristics accord with the unbalanced fault state of the rotor.