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论文:2014,Vol:32,Issue(5):787-792 |
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引用本文： |
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黄磊, 史仪凯, 袁小庆, 苏士斌. 混合系统故障诊断的模态转换自适应阈值研究[J]. 西北工业大学 |
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Huang Lei, Shi Yikai, Yuan Xiaoqing, Su Shibin. Mode-Dependent Thresholds for Fault Diagnosis and Identification of a Hybrid System[J]. Northwestern polytechnical university |
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| 混合系统故障诊断的模态转换自适应阈值研究 |
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| 黄磊, 史仪凯, 袁小庆, 苏士斌 |
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| 西北工业大学 机电学院, 陕西 西安 710072 |
| 摘要: |
| 混合系统是既有连续变量也有离散事件的复杂的动力学系统,混合系统中的模态转换及参数不确定性可引起残差突变,原因是不同的模态下有不同的元件参与,采用常数阈值或常规自适应阈值往往造成误诊和漏诊。通过搭建混合系统键合图诊断模型,在对参数不确定性进行区间估计的基础上,运用线性分式转换构造模态转换自适应阈值,解决混合系统故障诊断中的误诊和漏诊问题。通过车辆转向系统的故障诊断进行实例分析及检验,实验结果表明所提算法的正确性和可行性,为混合系统故障诊断提供了新的解决方案。 |
| 关键词:
键合图
故障诊断
混合系统
自适应阈值
模态转换
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| Mode-Dependent Thresholds for Fault Diagnosis and Identification of a Hybrid System |
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| Huang Lei, Shi Yikai, Yuan Xiaoqing, Su Shibin |
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| School of Mechatronics, Northwestern Polytechnical University, Xi'an 710072, China |
| Abstract: |
| A hybrid system is a complex dynamics system that includes both continuous variables and discrete e-vents; mode changes and component uncertainties lead to different compositions of component uncertainties and re-sidual fluctuations; the employment of constant threshold will cause false alarm or missed detection on hybrid faultdetection system.In this paper,we,taking component parameter uncertainties and mode change into considera-tion,utilize Global Analytical Redundancy Relations (GARR) and LFT Bond Graph model to formulate mode-de-pendent thresholds to address problems of false alarm or missed detection in FDI of a hybrid system.An online ex-periment of vehicle steering system is researched in detail to show the concepts of the proposed algorithm,and ex-perimental results of different faults suggest the feasibility of mode-dependent threshold in FDI of a hybrid system. |
| Key words:
failure analysis
fault detection
identification (control systems)
MATLAB
redundancy
uncertainsystems;adaptive threshold
Bond Graph model
hybrid system
FDI (fault diagnosis and identifica-tion)
mode change
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| 收稿日期: 2014-04-29
修回日期:
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| DOI: |
| 基金项目: 西北工业大学基础研究基金(JCY20130118);陕西省自然科学基金(2014KA050067)资助 |
| 通讯作者:
Email： |
| 作者简介: 黄磊(1975-)，西北工业大学博士研究生,主要从事机电控制与自动化研究。
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