匹配压缩脊线提取在齿轮箱故障诊断中的应用  

Planetary Fault Diagnosis via Demodulated Synchrosqueezing Ridge Extraction

作　　者：王箫剑 涂晓彤 李鸿光[1] 李富才[1] 包文杰 WANG Xiaojian;TU Xiaotong;LI Hongguang;LI Fucai;BAO Wenjie(State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University Shanghai, 200240, China)

机构地区：[1]上海交通大学机械系统与振动国家重点实验室

出　　处：《振动．测试与诊断》2019年第3期471-477,666,共8页Journal of Vibration,Measurement & Diagnosis

基　　金：国家科技重大专项资助项目(2017ZX04011014);国家自然科学基金资助项目(11427801)

摘　　要：匹配解调技术是一种新的时频分析方法,在处理非平稳信号的时频特性方面,具有较高的时频分辨率。基于此技术,提出了匹配压缩脊线提取技术用于旋转机械非平稳工况下的故障检测。结合匹配解调技术与同步压缩技术,从多分量信号频谱中提取基频;同时提出旋转算子滤波技术与包络线滤波技术,移除强能量分量信号,得到弱能量分量信号的脊线。运用此方法,当基频能量非最大且故障信号能量较小时,能同时提取基频与故障特征信号。仿真分析和实例分析表明,该方法优于一般的脊线提取方法。将该方法应用于行星齿轮箱上,可有效提取故障特征分量,并与基频进行较为直观的比较。此方法可用于变转速工况下行星齿轮箱的故障诊断。Matching demodulation is a new method of time-frequency analysis.The paper proposes a matching demodulation and synchrosqueezing technology to extract ridges of frequency from a multi-componentsignal spectrum.The ridges of weak energy component signals are obtained by using translation operator filtering and envelope line filtering.By using this method,the fault component can be simultaneously extracted with the component of the fundamental frequency.Simulation and example analyses show that the proposed method is superior to the general ridge extraction method.The method applied to the planet gearbox,can effectively extract the fault characteristic component,and the fundamental frequency.

关 键 词：匹配解调变换 同步压缩变换 脊线提取 非平稳信号 行星齿轮箱故障检测 

分 类 号：TH132.46[机械工程—机械制造及自动化] TB535[理学—物理]