快速谱相关引导ACMD的滚动轴承复合故障特征分离方法  

A fast spectral correlation-guided ACMD method for the separationof composite fault features of rolling bearings

作　　者：唐贵基[1,2] 成彪 徐振丽 王晓龙[1,2] TANG Guiji;CHENG Biao;XU Zhenli;WANG Xiaolong(Department of Mechanical Engineering,North China Electric Power University,Baoding 071003,China;Hebei Provincial Key Laboratory of Health Maintenance and Failure Prevention of Electrical Machinery Equipment,North China Electric Power University,Baoding 071003,China)

机构地区：[1]华北电力大学机械工程系,河北保定071003 [2]华北电力大学河北省电力机械装备健康维护与失效预防重点实验室,河北保定071003

出　　处：《振动与冲击》2023年第16期129-137,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金(52005180);河北省自然科学基金(E2022502003);河北省高等学校科学技术研究项目(QN2022190);中央高校基本科研业务费专项资金(2023MS127)。

摘　　要：以不同故障类型产生的冲击信号周期不同为出发点,提出了一种快速谱相关引导自适应线性调频模态分解的滚动轴承复合故障特征分离方法。首先使用快速谱相关搜寻复合故障信号中潜藏的循环频率成分;然后根据快速谱相关图绘制循环频率沿频率轴的能量分布曲线,提出单一循环频率能量主导准则挑选包含单一故障信息最多而另一故障信息最少的频带范围,从中选取合适的中心频率指引自适应线性调频模态分解对指定频带进行分解;最后对分解信号进行包络分析,根据故障频率判定故障类型。通过分析仿真信号以及外圈6点钟故障和12点钟故障与内圈复合故障试验信号表明,该方法可以实现复合故障特征的分离。Based on the different periods of shock signals generated by different fault types,a fast spectral correlation guided adaptive chirp mode decomposition method for rolling bearing composite fault feature separation was proposed.First,the fast spectral correlation was used to search the hidden cyclic frequency components in the composite fault signal,and then the energy distribution curve of the cyclic frequency along the frequency axis was drawn according to the fast spectral correlation diagram.A single cyclic frequency energy dominant criterion was proposed to select the frequency band range that contains the most single fault information and the least other fault information,from which the appropriate center frequency was selected to guide the adaptive linear frequency modulation mode decomposition to decompose the specified frequency band.Finally,envelope analysis of the decomposed signal was carried out to determine the fault type according to the fault frequency.The analysis of simulation signals and the experimental signals of 6 o’clock fault and 12 o’clock fault of outer ring and compound fault of inner rings shows that the method can realize the separation of compound fault features.

关 键 词：滚动轴承 快速谱相关 自适应线性调频模态分解 复合故障 

分 类 号：TH17[机械工程—机械制造及自动化]