基于多尺度量子熵的中介轴承故障诊断方法  

Inter-shaft bearing fault diagnosis method based on multi-scale quantum entropy

作　　者：田晶[1] 张羽薇 张凤玲[1] 艾辛平 高崇[1] TIAN Jing;ZHANG Yuwei;ZHANG Fengling;AI Xinping;GAO Chong(Liaoning Key Laboratory of Advanced Measurement and Test Technology for Aircraft Propulsion System,Shenyang Aerospace University,Shenyang 110136,China)

机构地区：[1]沈阳航空航天大学,辽宁省航空推进系统先进测试技术重点实验室,沈阳110136

出　　处：《航空学报》2022年第8期69-80,共12页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金(12172231);辽宁省自然科学基金(2020-BS-174);辽宁省教育厅项目(JYT2020019)。

摘　　要：针对中介轴承故障信号传递路径复杂,故障信号特征微弱诊断困难的问题,提出一种基于多尺度量子熵(MQE)、局部线性嵌入算法(LLE)与概率神经网络(PNN)的故障诊断方法。该方法采用空域相关降噪对振动信号进行滤波降噪,提高信号的信噪比;利用MQE提取中介轴承故障特征信息;采用LLE方法对高维特征进行降维处理;将低维故障特征输入PNN中进行故障识别。搭建了中介轴承故障模拟试验台,模拟中介轴承正常、内圈故障、外圈故障和滚动体故障,并采集数据对本文建立的中介轴承故障诊断算法进行验证。试验结果表明:提出的中介轴承故障诊断方法能够有效识别中介轴承故障类型,且没有出现过拟合现象,并表现出良好的泛化能力。Targeting at the problem of complex transmission path of inter-shaft bearing fault signal,weak fault signal characteristics and difficulty in fault feature extraction,a fault diagnosis method based on Multi-scale Quantum Entropy(MQE),Locally Linear Embedding(LLE)algorithm and Probabilistic Neural Network(PNN)is proposed in this paper.Firstly,the inter-shaft bearing fault signals are denoised through the spatial correlation noise reduction method to improve the signal to noise ratio.Secondly,MQE is utilized to extract the features of inter-shaft bearings.Then,LLE is utilized to reduce and fuse high-dimensional fault features of multi-sensor to construct fault samples.Finally,the low-dimensional fault features are input into PNN multi-fault classifier for fault identification.The fault simulation test bench of the inter-shaft bearing is built to simulate the normal bearing,inner ring fault,outer ring fault and rolling element fault,and the data were collected to verify the MQE-LLE-PNN inter-shaft bearing fault diagnosis algorithm established in this paper.The experimental results validate that the proposed method can effectively identify the inter-shaft bearing fault,and shows good generalization ability without any over-fitting phenomenon.

关 键 词：中介轴承 空域相关 多尺度量子熵 局部线性嵌入 故障诊断 

分 类 号：V231.92[航空宇航科学与技术—航空宇航推进理论与工程] TH133.33[机械工程—机械制造及自动化]