| 基于混杂系统及多元线性回归的电液伺服系统参数性故障建模 |
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| 引用本文： | 蒋新华,周理,陈丙三.基于混杂系统及多元线性回归的电液伺服系统参数性故障建模[J].中南大学学报(自然科学版),2012,43(3):997-1004. |
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| 作者姓名： | 蒋新华 周理 陈丙三 |
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| 作者单位： | 1. 中南大学信息科学与工程学院,湖南长沙,410083;福建工程学院电子信息与电气工程系,福建福州,350108
2. 福建工程学院机电及自动化工程系,福建福州,350108 |
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| 基金项目： | 福建省高校产学合作科技重大项目(2010H6002) |
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| 摘 要： | 为了有效地诊断电液伺服系统参数性故障,提出一种基于混杂系统及多元线性回归模型的电液伺服系统参数性故障模型.其过程为:将电液伺服系统的工况抽象为多个离散状态,建立压力-流量的观测模型；以结构参数为回归系数,基于样本数据的线性回归分析辨识模型参数；结合故障参数建立电液伺服系统的故障模型.利用参数辨识实验验证方法的参数拟合精度.研究结果表明:该模型能有效地应用于早期参数性故障的诊断,并能解决并发故障诊断困难的问题.
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| 关 键 词： | 电液伺服系统 参数性故障 混杂系统 多元线性回归 |
Parametric fault modeling for electro-hydraulic servo system based on hybrid system and multiple linear regression |
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| JIANG Xin-hua
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ZHOU Li
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CHEN Bing-san.Parametric fault modeling for electro-hydraulic servo system based on hybrid system and multiple linear regression[J].Journal of Central South University:Science and Technology,2012,43(3):997-1004. |
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| Authors: | JIANG Xin-hua ZHOU Li CHEN Bing-san |
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| Institution: | 1.School of Information Science and Engineering,Central South University, Changsha 410083,China;2.Department of Electronic Information and Electric Engineering,Fujian University of Technology,Fuzhou 350108,China;3.Department of Electromechanical and Automation Engineering,Fujian University of Technology,Fuzhou 350108,China) |
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| Abstract: | To effectively diagnose the parametric fault of electro-hydraulic servo system,a parametric fault model of electro-hydraulic servo system based on hybrid system and multiple linear regression model was proposed.The procedures are as follows.The operating condition of electro-hydraulic servo system was abstracted to discrete state,and observation model was built on the basis of the relationship between pressure and flow rate.Using structure parameter as regression coefficients,the model parameters were identified by applying multiple linear regression algorithm.An electro-hydraulic servo system fault model was established by combining the fault parameters.The precision of parameter fitting in the method was verified using the parameter identification experiment.The results show that the model proposed can be used to diagnose parametric fault effectively,and the problem of hardness in diagnosing concurrent faults can also be solved. |
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| Keywords: | electro-hydraulic servo system parametric fault hybrid system multiple linear regression |
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