基于Z变换的频谱细化方法及其应用  

A METHOD OF CALCULATING ZOOM SPECTRUM BASED ON Z-TRANSFORMATION AND ITS APPLICATIONS

作　　者：李力[1] 

机构地区：[1]武汉水利电力大学

出　　处：《振动与冲击》1997年第2期44-46,共3页Journal of Vibration and Shock

摘　　要：本文介绍一种基于Z变换的频谱细化方法—C-ZOOM算法。应用该方法对频谱细化后再进行傅利叶变换得到的细化倒谱,克服了在频率分辨率较低时,倒频谱效果较差的缺点,并将其应用于识别齿轮振动信号的调制边带结构。A method of calculating zoom spectrum based on Z-transformation, called C-ZOOM is introduced. Cepstrum is an efficient method, but may be ineffective in the case of lower resolution. The shortcoming can be overcome by using C-ZOOM which is, as on example, Applied to distinguish the sideband structure of a modulation vibration signal of gear transmission.

关 键 词：Z变换 倒频谱 细化倒谱 齿轮 振动 频谱细化 

分 类 号：TH113.1[机械工程—机械设计及理论]