输入饱和受限不确定NCS鲁棒Η_∞容错控制  

RobustΗ∞fault-tolerant control for uncertain NCS with input saturation constraint

作　　者：曹慧超[1] 李炜[1] 

机构地区：[1]兰州理工大学电气工程与信息工程学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2014年第1期80-87,共8页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(61364011);甘肃省自然科学基金(1308RJZA148)

摘　　要：研究输入饱和受限情况下,存在时变时延和丢包的不确定网络化控制系统的鲁棒H∞容错控制问题.采用状态反馈控制策略,利用Lyapunov稳定性理论以及线性矩阵不等式方法,通过引入辅助矩阵,并与反馈矩阵构成凸组合形式处理输入饱和项,得到确保系统无扰时鲁棒稳定的不变集条件及有扰时鲁棒H∞容错控制器的设计方法.结论推证中更紧界引理及改进型积分不等式的应用,减少了结论保守性和计算复杂度.通过一个仿真算例验证文中所述方法的可行性和有效性.The problem of the robust H∞ fault-tolerant control for a class of uncertain networked control system with time-varying delay and data packet dropout was studied subject to input saturation.By utilizing the Lyapunov stability theory and linear matrix inequalities method,the set of invariance conditions without disturbance and the design method of robust H∞ fault-tolerant controller with disturbance of the system were obtained using state feedback control strategy.The input saturation item were expressed as a convex combination between the feedback matrix and auxiliary matrix.The tighter bounded lemma and improved integral inequality are applicated which reduces the conservative and computational complexity of the conclusion.Finally,an numerical example is provided to demonstrate the effectiveness and the feasibility of the proposed design method.

关 键 词：网络化控制系统 输入饱和受限 容错控制 执行器故障 

分 类 号：TP302.8[自动化与计算机技术—计算机系统结构]