CAJ | 학술논문

将经验模态分解( Empirical Mode Decomposition,简称EMD)和倒频谱结合,利用EMD分解齿轮箱的振动信号,得到具有不同频率的固有模态函数( IMF)。从得到的基本模态函数可以发现齿轮箱振动信号具有明显的调幅特性,证明EMD方法可以有效地提取齿轮箱故障信息。将固有模态函数进行包络谱分析,运用倒频谱的方法对这些信号进行进一步提取和分离。试验表明,倒频谱和EMD方法相结合,能够准确提取振动特征。
장경험모태분해( Empirical Mode Decomposition,간칭EMD)화도빈보결합,이용EMD분해치륜상적진동신호,득도구유불동빈솔적고유모태함수( IMF)。종득도적기본모태함수가이발현치륜상진동신호구유명현적조폭특성,증명EMD방법가이유효지제취치륜상고장신식。장고유모태함수진행포락보분석,운용도빈보적방법대저사신호진행진일보제취화분리。시험표명,도빈보화EMD방법상결합,능구준학제취진동특정。
This paper combines the empirical mode decomposition(EMD)with cepstrum. EMD will make the gearbox vibration signal decomposed, and the intrinsic mode function can be various with different fre-quencies. From basic components, we can see the characteristic of amplitude modulation, indicating that EMD can be effectively applied to gearbox fault diagnosis. Then the intrinsic mode functionare applied to envelope spectrum analysis at the same time, using the cepstrum to extract and separate these signals. The experimental result shows that the combination of cepstrum analysis and EMD can effectively extract features of vibration.