希尔伯特变换在扭振测量中的应用

Application of Hilbert Transform for Measurement of Torsional Vibration

使用希尔伯特变换,对与轴系相连接的增量编码器所检测到的旋转编码脉冲进行解调处理,在不改变系统组成的基础上,实现旋转机械系统在线监测与故障诊断。研究了一种基于希尔伯特变换的高分辨率扭转振动测量方法及相应的脉冲调制解调,讨论了该方法的工作原理和现实中的具体方法和使用中存在的一些问题。通过试验,证明了使用该方法可以获得轴系扭转振动信号。将希尔伯特变换解调与Labview相结合可以建立扭转振动在线实时监控系统。

Applying Hilbert transform to demodulate the signals coming from a encoder, we can implement the inspecting on line and the default diagnosis of a revolving machine system without changing the system＇s composing parts. This paper primarily focuses on a method based on Hilbert transform demodulation with high resolution to torsional vibration measurement. Discussions are devoted to its principle, implementation and some problems encountered in the appli- cation of the method. The experiments have proved the correctness of the method. Using Hilbert transform and labview we can implement torisional vibration measurement on-time and online.