A complex filter for vibration signal demodulation in bearing defect diagnosis
A complex filter for vibration signal demodulation in bearing defect diagnosis
复制标题
DOI：
10.1016/j.jsv.2003.08.007
复制
发表时间：
2004-09
影响因子：
4.7
通讯作者：
Yuh-Tay Sheen
中科院分区：
文献类型：
--
作者：
Yuh-Tay Sheen
本文提出了一种用于希尔伯特变换的复滤波器应用于实时振动信号解调。滤波器可以直接提供作为频率和时间的函数的复信号，并且包络可以从复信号的绝对值导出。设计了缩放因子、中心频率和通带宽度三个参数，以实现波形收敛快、通带增益恒定和相位失真小等令人满意的特性。因此，所提出的滤波器的有限波形间隔可以应用于振动信号解调。理论分析和实验研究表明，所提出的滤波器可以有效地应用于滚子轴承系统的实时振动信号解调。
In this paper, a complex filter for Hilbert transform is proposed to apply in the real-time vibration signal demodulation. The filter could provide a complex signal directly, as a function of both frequency and time, and the envelope could be derived from the absolute value of the complex signal. Three parameters, the scaling factor, center frequency and passband width, are designated to achieve the satisfactory properties of fast waveform convergence, constant passband gain and little phase distortion. Thus, a finite waveform interval of the proposed filter could be possibly applied in the vibration signal demodulation. From theoretical analysis and experimental studies, it is shown that the proposed filter could be effectively applied in the real-time vibration signal demodulation for a roller bearing system.