Output Feedback Stabilization of Networked Control Systems With Packet Dropouts
Output Feedback Stabilization of Networked Control Systems With Packet Dropouts
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DOI：
10.1109/tac.2007.904284
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发表时间：
2007-09
影响因子：
6.8
通讯作者：
Wen-an Zhang;Li Yu
中科院分区：
文献类型：
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作者：
Wen-an Zhang;Li Yu
本文讨论了一类具有丢包的网络控制系统（ncs）的建模和控制问题。针对通信网络中前向和后向信道均可能存在丢包，且网络引起的时延小于一个采样周期的情况，将闭环网络控制系统建模为具有四个子系统的离散时间交换系统。利用异步动力系统方法和平均停留时间方法，以非线性矩阵不等式的形式给出了闭环网络控制系统指数稳定性的充分条件，并明确地建立了丢包率与闭环网络控制系统稳定性的关系。提出了一种基于观测器的输出反馈控制器的迭代设计方法。最后，通过一个算例验证了所提结果的有效性。
In this paper, we discuss the modeling and control of a class of networked control systems (NCSs) with packet dropouts. For the cases that there may be packet dropouts in both the backward and the forward channels in the communication network, and that the network-induced delays are shorter than one sampling period, the closed-loop NCS is modeled as a discrete-time switched system with four subsystems. By using the asynchronous dynamical systems approach and the average dwell-time method, sufficient conditions for the exponential stability of the closed-loop NCS are presented in terms of nonlinear matrix inequalities, and the relation between the packet dropout rate and the stability of the closed-loop NCS is explicitly established. A procedure involving an iterative algorithm is proposed to design the observer-based output feedback controllers. Lastly, an illustrative example is given to demonstrate the effectiveness of the proposed results.