含大时滞和噪声的网络化控制系统的最优故障诊断

李娟; 赵友刚; 于洋; 张鹏; 高洪伟

doi:10.3724/SP.J.1004.2012.00858

含大时滞和噪声的网络化控制系统的最优故障诊断

doi: 10.3724/SP.J.1004.2012.00858

李娟^1,2,,
赵友刚³,
于洋¹,
张鹏¹,
高洪伟¹

1.
青岛农业大学机电工程学院青岛 266109;
2.
重庆交通大学省部共建水利水运工程教育部重点实验室重庆 400074;
3.
青岛农业大学理学与信息科学学院青岛 266109

详细信息

通讯作者:
李娟, 青岛农业大学教授. 2008 年获中国海洋大学博士学位. 主要研究方向为动态系统的故障诊断和容错控制, 复杂系统的分析与设计.

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出版历程
- 收稿日期: 2011-05-31
- 修回日期: 2011-12-01
- 刊出日期: 2012-05-20

Optimal Fault Diagnosis for Networked Control Systems withLarge Time-delays and Noises

1.
College of Mechanical and Electrical Engineering, Qingdao Agricultural University, Qingdao 266109;
2.
Key Laboratory of Ministry of Education for Hydraulic and Waterborne Transportation Engineering, Chongqing 400074;
3.
College of Science and Information, Qingdao Agricultural University, Qingdao 266109

摘要

摘要: 研究含大测量时滞和噪声的网络控制系统(Networked control systems, NCS)的故障诊断问题, 提出一种新的基于无时滞转换方法的最优故障诊断器的设计方法. 该方法首先构造一个隐含故障状态的增广系统, 并利用无时滞转换方法将含有测量时滞的网络控制系统转换为无时滞系统. 然后给出了故障的可诊断性判据, 并利用对偶原理将最优故障诊断器的设计问题转换为状态反馈控制器设计问题. 最后, 通过构造一种满足二次型性能指标的最优故障诊断器, 实现了故障的实时诊断. 仿真示例验证了该方法的可行性和有效性.
- 故障诊断 /
- 网络化控制系统 /
- 时滞系统 /
- 最优控制 /
- 无时滞转换
Abstract: The problem of fault diagnosis is investigated for networked control systems (NCS) with large measurement delays and noises. Based on the delay-free transformation approach, a novel design approach to optimal fault diagnoser is proposed. This scheme first establishes an augmented system with hidden fault states, and the networked control system with delays is transformed into a delay-free one by using the delay-free transformation approach. Then, a diagnosability criterion of faults is given. Furthermore, the design problem of the optimal fault diagnoser is transformed into the design problem of a state feedback controller by utilizing the duality principle. Finally, the real-time fault diagnosis is realized by constructing a novel optimal fault diagnoser which meets the quadratic performance index. The feasibility and validity of the proposed scheme are demonstrated by a simulation example.
- Fault diagnosis /
- networked control systems (NCS) /
- time-delay systems /
- optimal control /
- delay-free transformation

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参考文献(1)

[1]

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