基于Fast-SC和EC的滚动轴承故障检测  

Fault Detection of Rolling Bearing Based on Fast-SC and EC

作　　者：杨新敏 郭瑜[1] 伍星[1,2] YANG Xinmin;GUO Yu;WU Xing(Faculty of Mechanical and Electrical Engineering,Kunming University of Science and Technology Kunming,650500,China;Yunnan Vocational College of Mechanical and Electrical Technology Kunming,650203,China)

机构地区：[1]昆明理工大学机电工程学院,昆明650500 [2]云南机电职业技术学院,昆明650203

出　　处：《振动．测试与诊断》2023年第3期578-583,624,625,共8页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(52165067);云南省重大科技专项计划资助项目(202002AC080001);昆明理工大学分析测试基金资助项目(2022P20193103005)。

摘　　要：解调分析的关键在于准确找到合适的解调频带,针对此问题,提出一种基于快速谱相关(fast spectral correlation,简称Fast-SC)和包络谱谱峰因子(crest of envelope spectrum,简称EC)的解调频带确定方法,应用于滚动轴承故障检测。首先,对信号进行Fast-SC计算,采用考虑滚动体滑移误差的故障频率区间作集成谱相关切片并将其作为目标谱相关曲线,根据其最大值确定解调频带的中心频率搜索中心;其次,用同时考虑冲击信号强度与周期性的EC进行频带优化选择,自适应获得优化的滤波参数组;最后,根据所得滤波参数组对信号进行带通滤波,并求其包络谱,实现轴承故障特征频率提取。仿真和实验表明,与Autogram解调算法相比,所提方法降噪能力更强,解调频带的选择更优。s of Vol.43 No.3 in English demodulation frequency band determination method based on the fast spectral correlation(Fast-SC)and the crest of envelope spectrum(EC)is proposed to extract the feature frequency of fault rolling bearings.Firstly,signal is performed by Fast-SC algorithm.Considering the difference between theoretical fault frequency and ac-tual fault frequency caused by slip,the integrated spectrum correlation section of theoretical fault frequency in-terval of bearing is adopted as the target spectrum correlation curve.The center frequency search center of the demodulation frequency band according determined to its maximum value.Then,the EC is used as the band-width optimization indicator to adaptively obtain the optimal filter parameters.Finally,the signal is bandpass fil-tered according to the obtained filter parameter set,and its envelope spectrum is obtained to realize bearing fault feature extraction.Simulation and experiment results show that compared with the Autogram demodula-tion algorithm,the proposed method has better noise reduction ability and better choice of demodulation fre-quency band.

关 键 词：解调频带 特征频率 快速谱相关 包络谱谱峰因子 集成谱相关切片 

分 类 号：TH17[机械工程—机械制造及自动化] TH133.332