计算机工程

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连续时间网络控制系统的鲁棒故障检测

丰敏佳,王玉龙   

  1. (江苏科技大学电子信息学院,江苏 镇江 212003)
  • 收稿日期:2014-08-27 出版日期:2015-08-15 发布日期:2015-08-15
  • 作者简介:丰敏佳(1989-),男,硕士,主研方向:网络控制系统故障检测;王玉龙(通信作者),副教授、博士。
  • 基金项目:
    国家自然科学基金资助项目(61374063,61403170);江苏省产学研前瞻性联合研究基金资助项目(BY2013066-01);江苏省“青蓝工程”优秀青年骨干教师基金资助项目;江苏省高校中青年骨干教师境外研修基金资助项目。

Robust Fault Detection for Continuous-time Networked Control System

FENG Minjia,WANG Yulong   

  1. (School of Electronics and Information,Jiangsu University of Science and Technology,Zhenjiang 212003,China)
  • Received:2014-08-27 Online:2015-08-15 Published:2015-08-15

摘要: 针对一类具有网络诱导时延、数据丢包以及通信限制的连续时间网络控制系统,研究鲁棒故障检测滤波器的设计问题,提出一种新的故障检测方法。考虑传感器到控制器的网络诱导时延和数据丢包,以及控制器到执行器的通信限制,利用基于观测器的故障检测滤波器生成残差信号,建立连续时间网络控制系统的故障检测模型,通过定义合适的Lyapunov泛函并利用凸分析方法,给出故障检测滤波器设计准则。理论分析结果表明,故障检测滤波器设计准则具有较低的保守性,故障检测滤波器能同时保证残差系统对故障的灵敏性和对系统外部扰动输入的鲁棒性。数值算例验证了该检测方法的可行性。

关键词: 网络控制系统, 故障检测, 通信限制, 时延, 数据丢包, 凸分析

Abstract: This paper is concerned with fault detection filter design for continuous-time Networked Control System(NCS) under consideration of network-induced delays,packet dropouts and communication constrains.The network-induced delays and packet dropouts in the sensor-to-controller channel,and communication constrains in the controller-to-actuator channel are considered simultaneously,the observer-based fault detection filter is adopted to generate residual signal,then the fault detection model for continuous-time NCS is established.By defining an appropriate Lyapunov functional and adopting the convex analysis method,the observer-based fault detection filter design criteria is established.The theoretical analysis illustrates the less conservatism of the proposed fault detection filter design criteria.The designed fault detection filter can guarantee the sensitivity of the residual signal to faults,and the robustness of the considered systems to disturbances.The simulation results illustrate the effectiveness of the proposed detection method.

Key words: Networked Control System(NCS), fault detection, communication constrain, delay, packet dropout, convex analysis

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