基于多尺度量子熵的中介轴承声发射信号故障特征提取技术研究  

Research on fault feature extraction technology of acoustic emission signal of inter-shaft bearing based on multi-scale quantum entropy

作　　者：刘丽丽 田晶 刘广鑫 张帅 田博文 艾延廷 LIU Li-li;TIAN Jing;LIU Guang-xin;ZHANG Shuai;TIAN Bo-wen;AI Yan-ting(Faculty of Aero Engine,Shenyang Aerospace University,Shenyang 110136,China;NO.1 Military Representative Office of the Equipment Department of PLA Air Force in Shenyang,Shenyang 110850,China;The Chinese People′s Liberation Army Unit 93318,Tieling 112300,China)

机构地区：[1]沈阳航空航天大学航空发动机学院,沈阳110136 [2]空军装备部驻沈阳地区第一军事代表室,沈阳110850 [3]中国人民解放军93318部队,辽宁铁岭112300

出　　处：《沈阳航空航天大学学报》2020年第2期1-9,共9页Journal of Shenyang Aerospace University

基　　金：国家自然科学基金(项目编号:11702177);辽宁省自然科学基金(项目编号:20180550560)。

摘　　要：针对中介轴承声发射故障信号非平稳、非线性,且故障信号特征微弱等特点,将信息熵理论与量子理论相融合,提出了一种多尺度量子熵的中介轴承故障特征提取方法。首先,建立了声发射信号的多量子位系统,构建量子信息熵的计算方法;然后,采集4种不同工况下的中介轴承声发射信号,最后,对采集的故障信号进行多尺度分解,提取不同尺度下粗粒向量的量子熵值。结果表明,提取的故障特征能够准确表征中介轴承故障状态,且具有良好的稳定性。Aiming at the non-stationary,non-linear and weak characteristics of acoustic emission fault signals of Inter-shaft bearings,a multi-scale quantum entropy based fault feature extraction method for Inter-shaft bearings was proposed,which combined information entropy theory with quantum theory.Firstly,the multi-qubit system of AE signal was established,and the calculation method of quantum information entropy was constructed.Then,the AE signals of Inter-shaft bearing under four different working conditions were collected.Finally,the fault signals were decomposed at multi-scale to extract the quantum entropy values of coarse-grained vectors at different scales.The results show that the fault features extracted can accurately characterize the fault state of Inter-shaft bearings and have good stability.

关 键 词：中介轴承 声发射 多尺度分解 量子熵 特征提取 

分 类 号：V263.6[航空宇航科学与技术—航空宇航制造工程]