LCD谱熵及其在滚动轴承退化状态识别中的应用  

LCD spectrum entropy and its application on the degradation state identification of rolling bearing

作　　者：王余奎[1] 朱倩[1] 张磊[1] 朱臣[1] 滕伟 WANG Yukui;ZHU Qian;ZHANG Lei;ZHU Chen;TENG Wei(Air Force Logistics College,Xuzhou 221000,China)

机构地区：[1]空军勤务学院,江苏徐州221000

出　　处：《中国测试》2020年第3期135-142,共8页China Measurement & Test

基　　金：空军装备科研重点项目(KJ20172A05171,KJ2016A2162);国家自然科学基金青年科研基金项目(51705530)。

摘　　要：针对滚动轴承在出现故障时其振动信号呈现出非线性、非平稳特性,以及退化特征难以提取等问题,将局部特征尺度分解法应用到轴承振动信号分析中,并与信息熵理论融合提出局部特征尺度分解谱熵的滚动轴承退化特征指标。该方法首先对不同故障程度的轴承振动信号做局部特征尺度分解,基于得到的内禀尺度分量计算振动信号得能谱熵、奇异谱熵和包络谱熵用于表征轴承故障程度,仿真信号分析结果表明以上特征指标能够较好地反映滚动轴承的退化状态。对内圈故障和外圈故障模式下不同程度故障的轴承振动信号进行分析,结果表明该文提出的退化特征能够有效表征轴承的退化状态,并采用灰关联分析法构建轴承退化状态识别模型,可有效实现轴承退化状态识别。Aiming at the nonlinear and non-stationary characteristic of bearing vibration signal,the local characteristic scale decomposition was introduced and used in the analysis of its vibration signal.The local characteristic scale decomposition spectrum entropy as a novel degradation feature extraction method was proposed based on the combination of local characteristic scale decomposition arithmetic and information entropy theory.The local characteristic scale decomposition was performed to the rolling bearing vibration signal in different fault levels.The power spectrum entropy,singular spectrum entropy and the envelope spectrum entropy were extracted from the obtained intrinsic scale components.The analysis results of simulation signal demonstrated the good performance of the proposed method.The degradation feature vector was composed with the three features and the performance of it was tested by perform LCDSE to the practical vibration signal of bearing with inner circle point eclipse and inner circle point eclipse in different fault levels.The standard degradation mode matrix was built,and the degradation state testing samples of the two fault pattern were used to perform grey incidence analysis with the standard degradation mode matrix,and the incidence degree was used to judge the degradation state of bearing.

关 键 词：滚动轴承 局部特征尺度分解 谱熵 退化状态识别 

分 类 号：TP306.3[自动化与计算机技术—计算机系统结构]