基于输出反馈网络化控制系统鲁棒容错控制  

Robust Fault-tolerant Control Based on Dynamic Output Feedback for Networked Control System

作　　者：李炜[1] 蒋栋年[1] 张建全[1] 

机构地区：[1]兰州理工大学电信工程与信息工程学院,甘肃兰州730050

出　　处：《控制工程》2011年第1期62-66,共5页Control Engineering of China

基　　金：国家自然科学基金资助项目(60964003);甘肃省自然科学基金项目(096RJZA101);兰州理工大学特色学术梯队基金项目(0950)

摘　　要：研究了一类具有时延不确定性的网络化控制系统的鲁棒容错控制问题。针对以往控制器大多采用状态反馈的形式,而对功能和结构复杂的网络化控制系统全部状态往往难于测取,因而状态反馈形式的控制器在应用中会受到限制,完整性问题的结果也主要基于0-1故障模型。采用动态输出反馈控制策略,针对网络化控制系统的时延和不同步对系统产生的影响,基于将时延的不确定性转换为系统状态方程系数矩阵不确定性的NCS模型,应用Lya-punov稳定性理论和LMI方法,推证出了当执行器或传感器发生更一般故障时网络化控制系统具有鲁棒完整性的充分条件,并给出了通过求解线性矩阵不等式求取容错控制器的设计方法,最后用仿真实例验证了此方法的可行性和有效性。The problem of robust fault-tolerant control for networked control systems（NCSs） with uncertainty of network-induced delay is investigated.For the past,because of the using of state feedback controller,the function and structure of complex networked control systems are often difficult to measure,and thus the form of state feedback controller in the application will be restricted.Integrity problem is based on 0-1 fault model.According to the impact of delay and synchronized of networked control system,the dynamic output feedback control strategy is adopted.The uncertainty of the delay is converted to the the parameters uncertainties,and in order to eliminate the effect of asynchronism,the states are transform to the augmented states.By using Lyapunov functional,and adopting dynamic output feedback controller,the integrity design for NCSs with failures of actuator and sensor is analyzed,and the robust fault-tolerant controller gain can be obtained via solving several linear matrix inequalities（LMIs）.The numerical example is given to demonstrate effective and feasibility.

关 键 词：网络化控制系统 容错控制 动态输出反馈 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]