HHT的LabVIEW实现及在振动信号中的应用

The Development of HHT Module Based on LabVIEW in Analysis Rotating Machinery Vibration Signal

采用一种新的固有模态函数(intrinsic mode function,简称IMF)筛选停止条件代替目前常用的筛选停止条件,根据希尔伯特-黄变换(Hilbert-Huang transform,简称HHT)原理开发出LabVIEW的HHT模块。利用仿真信号对不同筛选条件进行对比,并利用开发的模块对转子试验台实测的振动数据进行分析。结果表明,基于新的筛选条件开发的模块更具合理性,能够对信号进行正确分析,满足振动测试分析的任务要求。

Instead the commonly used intrinsic modal functions screening stop conditions of a new method of intrinsic modal functions screening stop conditions, according to Hilbert- Huang transform principledeveloped the LabVIEW HHT module, using simulation signal to contrast different stop conditions, and using the developed module to analysis the vibration data of the rotor test device, the results show that the development module based on new screening stop conditions is more rational, and could analysis the data correctly, meet the task requirements of test.