无量纲与SVM的石化机组旋转机械故障诊断方法  

Dimensionless and SVM Fault Diagnosis Method for Rotating Machinery of Petrochemical Units

作　　者：周凌孟 张清华 邓飞其[1] 孙国玺[2] 苏乃权[2] 朱冠华 ZHOU Lingmeng;ZHANG Qinghua;DENG Feiqi;SUN Guoxi;SU Naiquan;ZHU Guanhua(School of Automation Science and Engineering,South China University of Technology,Guangzhou 510000,China;Guangdong Provincial Key Laboratory of Petrochemical Equipment Fault Diagnosis,Guangdong University of Petrochemical Technology,Maoming 525000,Guangdong,China)

机构地区：[1]华南理工大学自动化科学与工程学院,广州510000 [2]广东石油化工学院广东省石化装备故障诊断重点实验室,广东茂名525000

出　　处：《噪声与振动控制》2024年第1期119-125,161,共8页Noise and Vibration Control

基　　金：国家自然科学基金重点资助项目(61933013,61673127,61973094);广东省自然科学基金面上资助项目(2022A1515010599);茂名市科技计划资助项目(2017304,2020S004,170607111706145);博士启动基金资助项目(2020bs006)。

摘　　要：针对石化机组旋转机械故障信息存在非线性、重叠性等特点,提出一种无量纲与支持向量机(Support Vector Machine,SVM)的石化机组旋转机械故障诊断方法。首先对采集的振动信号进行分析并将其无量纲化;接着通过特征选择选取高价值与敏感性强的无量纲特征,降低分类模型复杂度并提高算法速度;最后通过选取合适的SVM分类模型进行分类诊断。结合具有无量纲特征的故障敏感性与SVM的非线性分类性进行诊断分类,并通过石化机组故障诊断实验平台进行验证,表明该方法相比于其他经典分类方法分类效果更好,分类正确率为99.1%,证明了方法的有效性。In view of the nonlinear and overlapping characteristics of the fault information of the rotating machinery of petrochemical units,a fault diagnosis method based on the dimensionless and support vector machine(SVM)is proposed.Firstly,the collected vibration signals are analyzed and non-dimensionalized.Then,through feature selection,the dimensionless features with high value and strong sensitivity are selected to reduce the complexity of classification model and improve the speed of algorithm.Finally,the appropriate SVM classification model is selected for classification diagnosis.The fault sensitivity of dimensionless features and the nonlinear classification of SVM are combined for diagnosis and classification.Through the verification by the petrochemical unit fault diagnosis experimental platform,this fault diagnosis method is proved to have a better classification effect than the other classical classification methods,and the classification accuracy can reach 99.1%.

关 键 词：故障诊断 旋转机械 无量纲特征 特征选择 SVM 

分 类 号：TH133.3[机械工程—机械制造及自动化] TP206.3[自动化与计算机技术—检测技术与自动化装置]