机械与电子2017，Vol.35Issue(5)：3-5,13,4.
融合工艺和振动信息的设备变工况运行风险评估方法
A Risk Assessment Method of Variable Operating Conditions for Equipment with Technology and Vibration Information
摘要
Abstract
An operating risk assessment method was put forward in this paper aiming at the problems of variable operating condition for equipment.Firstly, extract the eigenvalue of the equipment vibrating and processing signals and conduct feature fusion based on information entropy;Then, set up a CHMM condition monitoring model under the extremum condition, and build a SVM regression model by using the export data of the CHMM model and the process data;Thirdly, identify the source and extent of the state change by calculating the output result difference value of current data of the equipment from two models;Finally, convert the maximum likelihood estimation of CHMM-SVM model to possibility which was then converted to the credibility of the operating condition by threshold, and conduct the equipment operating risk assessment based on the D-S evidence theory.The gearbox operating state was verified in an experiment, the results of which show that the method can comprehensively reflect the changes of the equipment operating condition.关键词
信息熵/变工况/特征融合/CHMM-SVM模型/风险评估Key words
information entropy/variable operating condition/feature fusion/CHMM-SVM model/risk assessment分类
信息技术与安全科学引用本文复制引用
韩芝侠..融合工艺和振动信息的设备变工况运行风险评估方法[J].机械与电子,2017,35(5):3-5,13,4.基金项目
陕西省科技厅工业攻关项目(2014K05-47) （2014K05-47）
