短时傅立叶变换在振动信号处理中的应用

摘要

As signals of short time non-stationary were often hidden in the course of long time stationary signal, the processing was neglected frequently and the whole signal analyzing was limited. In order to solve the problem, short time fourier transform was introduced to deal with local data in the paper. High time-frequency resolution was got by this method, which offered a way to analyze the characters of vibration signal.%短时非平稳振动信号往往淹没于较长时间的平稳或准平稳段落之中,从而忽略对其处理,使深入分析信号的全貌受到限制.针对实测振动信号中的这类信号,引进短时傅立叶变换进行局部数据处理,得到良好的时频分辨率,为全面分析振动信号特性提供了一种方法.