中国机械工程Issue(19)：2564-2570,7.DOI:10.3969/j.issn.1004-132X.2015.19.002
基于ASTFA的广义解调方法及应用
Generalized Demodulation Method Based on ASTFA Method and Its Applications
摘要
Abstract
Combining with the advantages of the ASTFA and the generalized demodulation,a generalized demodulation method was proposed based on the ASTFA.Firstly,the original signals were decomposed via ASTFA,and the component and its corresponding phase function were obtained. Secondly,the demodulation phase function was formatted by extracting the secondary and higher or-der terms of the phase function.Then,the generalized demodulation method was applied to the com-ponent using the demodulation phase demodulation function.Finally,the frequency domain analyses were applied to the demodulated component to extract feature information.Simulation and experimen-tal analyses show that the method is very suitable for processing multi-component frequency modula-ted signals,and can effectively extract the damage characteristic informations of the rolling bearing damages in shifting conditions.关键词
自适应最稀疏时频分析/广义解调/相位函数/频率调制/滚动轴承Key words
adaptive and sparsest time-frequency analysis(ASTFA)/generalized demodulation/phase function/frequency modulation/rolling bearing分类
机械制造引用本文复制引用
李宝庆,程军圣,彭延峰,杨宇..基于ASTFA的广义解调方法及应用[J].中国机械工程,2015,(19):2564-2570,7.基金项目
国家自然科学基金资助项目(51375152) （51375152）
