摘要
考虑一类存在异步采样时钟的不确定长时延网络控制系统.假定其可能发生故障,设计了离散状态观测器,对其进行故障检测.当系统正常时,观测器系统的稳定性条件被近似为一个包含线性矩阵不等式条件的最小化问题;只要该最小化问题有解,则整个系统是渐近稳定的.当系统发生故障时,该观测器残差能够迅速发生跳变,从而检测出故障的发生.给出一个仿真示例验证了文中方法的有效性.
A class of networked control systems with uncertain long time delays of asynchronous sampling clock is considered, and a discrete state observer is designed to detect faults when they occur in the＇system. When the system is normal, the stability condition of the observer system is approximated with a minimization problem involving conditions of linear matrix inequalities. So long as this minimization problem is solved, the whole system is asymptoti- cally stable. When a fault occurs, the observer residue can change rapidly to detect the fault. A simulation example is given to demonstrate the effectiveness of the proposed method.
出处
《信息与控制》
CSCD
北大核心
2007年第3期386-391,共6页
Information and Control
关键词
网络控制系统
故障检测
异步时钟
离散观测器
networked control system
fault detection
asynchronous clock
discrete observer
