摘要
针对一类同时存在长时延和异步采样时钟的网络控制系统,假定其可能发生的故障,设计了系统的具有时延补偿功能的鲁棒H∞状态观测器,对其进行故障检测。当系统正常时,将观测器系统建模为一类具有不确定性的离散线性切换系统,基于该模型,利用线性矩阵不等式(LMIs)方法给出了系统鲁棒稳定性条件和H∞性能指标的求解方法;当系统发生故障时,观测器残差能够迅速发生跳变,从而检测出故障的发生。仿真示例验证了所提出方法的有效性。
Focusing on a class of networked control systems with long time-delay and asynchronous sampling clock, the robust H∞ state observer with delay compensation is designed to detect faults when they occur in the system. When the system is normal, the observer system is modeled as uncertain discrete linear switched system. Based on the model, the robust stability condition of the systern and the performance value of H∞ norm are given in terms of a group of linear matrix inequalities. When a fault occurs, the observer residue can change rapidly to detect the fault. A numerical example shows the effectiveness of the proposed method.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2009年第2期172-177,182,共7页
Journal of Nanjing University of Science and Technology
关键词
网络控制系统
故障检测
异步时钟
切换系统
长时延
networked control systems
fault detection
switched systems
long time-delays
