Robust H_∞ Control of Networked Control Systems with Short Delays and Packet Dropouts
Robust H_∞ Control of Networked Control Systems with Short Delays and Packet Dropouts
复制标题
DOI：
--
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Liang We
中科院分区：
文献类型：
--
作者：
Liang We
针对一类具有网络延迟和丢包的网络控制系统（ncs），研究了H∞控制问题。在前向和后向信道均存在短时延和丢包的情况下，通过系统状态增强将网络控制系统建模为具有四个子系统的切换系统。基于增广系统模型，提出了一种新型的静态输出反馈控制律。利用时间窗丢包率的概念和平均阱时间方法，得到了闭环网络控制具有鲁棒稳定性和w加权H∞性能的充分条件。为实现增益随双信道丢包模式变化的输出反馈鲁棒H∞控制器的合成，应用线性矩阵不等式技术和锥互补线性化算法给出了控制器的设计步骤。设计实例验证了该方法的有效性。
The H∞control problem w as addressed for a class of netw orked control systems( NCSs) with network-induced delays and packet dropouts. For the case that short delays and packet dropouts existed in both the backw ard and the forw ard channels,the NCS w as modeled as a sw itched system w ith four subsystems via system states augmentation. A new type of static output feedback control law w as proposed based on the augmented system model. By using the notion of time-w indow packet dropout rate and the average dw ell time method, sufficient conditions w as obtained for the robust stability and the w eighted H∞performance of the closedloop NCS. To achieve synthesis of the output feedback robust H∞controller,for w hich the gain varied according to the mode of packet dropouts of dual channels,design procedures w ere given by applying the linear matrix inequality technique and the cone complementarity linearization algorithm. The effectiveness of the proposed approach w as validated by a design example.