滑动峰态算法解调性能及应用研究  

Demodulation Analysis of Sliding Kurtosis Algorithm and Its Applications

作　　者：杨富春[1] 周晓军[1] 杨先勇[1] 

机构地区：[1]浙江大学,杭州310027

出　　处：《中国机械工程》2009年第7期803-807,共5页China Mechanical Engineering

摘　　要：在分析调制信号局部非高斯分布特性的基础上,提出了一种新的基于滑动峰态算法的解调方法。该方法首先通过对原信号时间序列进行滑动峰态计算,获得一个新的峰态时间序列,然后分析其频谱获得调制及载波信息。以仿真和轴承、齿轮的故障实例验证了该方法的有效性。A new demodulation method was proposed based on the local non--Gaussian characteristics of modulation signals. Using this method, a new kurtosis series was obtained firstly by computing the sliding local kurtosis of the original signals, then, FFT of the kurtosis series was done to demodulate the modulation information and carrier wave information. The analysis results of the simula- tion signals and the bearing and gear fault signals by the proposed method illustrate that the new method has good demodulation ability.

关 键 词：故障诊断 峰态 解调分析 轴承 齿轮 

分 类 号：TN911[电子电信—通信与信息系统]