摘要
针对被控对象是线性定常系统的网络控制系统,设传感器与控制器均为时间驱动,未能成功传输数据的传感器节点视为暂时失效,将网络控制系统建模为一类具有时变传感器"故障"的系统。此类系统相当于一个有限子系统的切换系统。借助容错控制和切换系统理论,利用Luenberger降维观测器估计系统状态,采用李亚普诺夫理论和线性矩阵不等式描述方法,给出了闭环系统渐近稳定的充分条件和控制器的设计方法。通过Matlab数值仿真算例,证明了分析方法和结果的有效性。
Considering a networked control system with an linear time-invariant plant, the sensors and controllers are assumed time-driven, the sensors failing to transmit data are treated to be invalidated temporarily, and the networked control system is modeled as a system with time- variant sensors fault. Such a system is a switched system with finite subsystems,With the theory of Lyapunov and linear matrix inequality for-mutation, the sutfficient condition for the asymptotic stability of the closed-loop system is proposed based on Luenberger reduced order state observer and the design approach of the controller and observer is given, A numerical simulation example with Matlab shows that the analysis method and the results are valid and feasible.
出处
《控制工程》
CSCD
2008年第3期306-309,共4页
Control Engineering of China
关键词
网络控制系统
降维观测器
容错控制
networked control systems
reduced order observer
fault-tolerant control
