摘要
针对存在随机数据包丢失的网络环境,研究了一类网络控制系统的故障检测问题.考虑随机丢包同时发生在传感器与控制器以及控制器与执行器之间,将网络控制系统建模为含有4个模态的马尔可夫跳变线性系统.基于此类模型,构造了系统的残差发生器,相应的故障检测问题转化为H∞滤波问题.利用马尔可夫跳变线性系统理论,设计了故障检测滤波器,使得残差动态系统均方稳定,且满足一定的扰动抑制水平.数值算例表明,在发生随机数据包丢失的情况下,上述故障检测滤波器不仅对故障敏感,同时对外界扰动具有鲁棒性.
With the presence of stochastic packet dropout effects in the network, the problem of fault detection filter design for a class of networked control system is investigated. When the random packet dropout occurs in both the channel between sensor and controller and the channel between controller and actuator, we model the networked control system as a Markovian jump linear system with four operation modes. Based on this model, the residual generator is developed and the problem of fault detection and isolation is formatted as a problem of H-infinity filtering. By using the theory of Markovian jump linear system, we propose a design method for fault detection filter, which makes the residual generation system stable in the mean-square sense, satisfying a prescribed disturbance attenuation level. The numerical example shows that the proposed fault detection filter is sensitive to the fault but robust to exogenous disturbance.
出处
《控制理论与应用》
EI
CAS
CSCD
北大核心
2011年第1期79-86,共8页
Control Theory & Applications
基金
国家自然科学基金资助项目(60574082
60804027
6094129)
江苏省自然科学基金资助项目(bk2009388)
南京理工大学自主科研专项计划资助项目(2010ZYTS012)
关键词
网络控制系统
数据包丢失
马尔可夫跳变系统
故障检测
networked control systems
random packet dropout
Markovian jump linear system
fault detection
