一种基于对角切片高阶谱的故障识别方法  

A Fault Identification Method Based on High-order Spectral Analysis of Diagonal Slices

作　　者：刘文艺[1] 汤宝平[1] 陈仁祥 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400030

出　　处：《机械科学与技术》2010年第3期281-284,共4页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家高技术研究发展计划(863计划)项目(2009AA04Z411);国家自然科学基金项目(50875272;50735008);重庆大学"211工程"三期建设研究生开放实验室项目资助

摘　　要：针对轴承故障信号中调制信号二次相位耦合的特点,提出了一种基于对角切片高阶谱的故障识别方法。该方法利用希尔伯特变换构造原始信号的解析信号,在高阶谱分析的基础上求其对角切片谱,可以有效地分析二次相位耦合引起的非线性信号。通过理论分析和轴承故障诊断实例,表明该方法可以有效地抑制噪声,提取振动信号的非线性特征,完成对轴承外圈故障和内圈故障特征的识别。A fault identification method based on high-order spectrum of diagonal slices was presented in this paper. On the basis of analyzing the fault roller bearing signal feature and the principle of high-order spectrum analysis, the new method was used in the fault roller bearing vibration signal analysis. The diagonal slices high-order spectrum of the envelope signal based on the original vibration signal was calculated and the non-linear feature derived from the quadratic phase coupling was extracted. Theoretical analysis and fault roller bearing diagnoses show that the new method can suppress the noise effectively and extract the non-linear feature in the vibration signal clearly. The roller bearing vibration signal with inner rings defect and outer rings defect are used to simulate and testify the validity of this method .

关 键 词：对角切片 高阶谱 故障识别 滚动轴承 

分 类 号：TH17[机械工程—机械制造及自动化]