一种少保守性的NCS鲁棒H_∞保性能容错控制  

A less-conservative robust H_∞ guaranteed cost fault-tolerant control of networked control system

作　　者：李炜[1] 王艳飞[2] 

机构地区：[1]兰州理工大学电气工程与信息工程学院,兰州730050 [2]兰州理工大学甘肃省工业过程先进控制重点实验室,兰州730050

出　　处：《控制与决策》2011年第12期1768-1776,共9页Control and Decision

基　　金：国家自然科学基金项目(60964003);甘肃省自然科学基金项目(096RJZA101)

摘　　要：研究一类含有时变时延和丢包的网络化控制系统的鲁棒H_∞保性能容错控制问题.基于一种状态多时延模型,推导出确保闭环系统在执行器或传感器发生失效故障时具有鲁棒H_∞保性能的时滞依赖充分条件,并针对求解具有LMIs约束的凸优化问题,给出了最优鲁棒H_∞保性能容错控制器的设计方法.由于新模型中考虑了时延下界,且证明过程引入了适当自由权矩阵变量,所得结果具有较少保守性.仿真实例验证了所提出方法的有效性.The problem of robust H∞ guaranteed cost fault-tolerant control for a class of networked control system（NCS） with time-varying delay and packet dropout is investigated. A new model is employed to represent the linear controlled plant in the NCS, a sufficient condition for a robust H∞ guaranteed cost integrity design with failures of actuator or sensor is given in terms of a delay-dependent approach. And the design method of the optimal robust H∞ guaranteed cost fault-tolerant controllers is given with LMIs constraints. Moreover, a less conservative method is obtained due to the lower bound of the time-delay introduced in the model and appropriate free-weighting matrices introduced during the proof. A numerical example shows the effectiveness of the proposed method.

关 键 词：网络化控制系统 时变时延 丢包 保性能控制 H∞容错控制 

分 类 号：TP302.8[自动化与计算机技术—计算机系统结构]