基于状态观测器的网络化控制系统的H_∞控制分析  

Robust Observer-based H_∞ Control for a Class of Networked Control Systems

作　　者：姚秀明[1] 李清华[1] 王常虹[1] 凌明祥[1] 袁智[1] 

机构地区：[1]哈尔滨工业大学空间控制与惯性技术研究中心,黑龙江哈尔滨150001

出　　处：《兵工学报》2008年第7期870-876,共7页Acta Armamentarii

摘　　要：本文研究了具有随机时变延时的网络控制系统的H∞控制问题。通过对连续的网络控制系统模型离散化,得到离散的网络控制系统模型。借助于示例,分析了延时小于一个采样周期时,对离散时间系统动态性能的影响。基于离散的网络控制系统模型,通过选取合适的Lyapunov函数,利用线性矩阵不等式方法(LMI)、锥补线性化方法(CCL),设计了基于观测器的输出反馈控制律,使得系统是鲁棒渐进稳定的且满足给定的H∞干扰抑制率。最后仿真示例验证了本文方法的有效性。This paper focuses on the problem of robust H∞ controller design for networked control systems with the effects of time-varying random delay. The model of discrete-time networked control sys- tems was obtained by discretizing the model of continuous-time ones. With the aid fo an example, the influence of the delay on the dynamic performance of the discrete-time system was analyzed, which is less than a sampling period. Based on the discrete-time model of networked control system, by choosing a suitable Lyapunov functional and using linear matrix inequality （LMI） and cone complementarity linearization （CCL） algorithm, an observer-based controller was designed to guarantee the robust by asymptotical stability of the closed-loop system and achieve the prescribed H∞ disturbance attenuation level. A numerical example proved the proposed method to be feasible.

关 键 词：自动控制技术 网络化控制系统 控制 锥补线性化 线性矩阵不等式 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]