基于事件触发机制的NNCS混合非脆弱容错控制  

Hybrid Non-fragile Fault-tolerant Control for NNCS based on Discrete Event-triggered Communication Scheme

作　　者：王君[1,2] 张晓燕 李炜 WANG Jun;ZHANG Xiaoyan;LI Wei(College of Electrical and Information Engineering, Lanzhou University of Technology, Lanzhou 730050, China;Key Lab of Advanced Control for Industrial Process in Gansu Province, Lanzhou 730050, China;National Demonstration Center for Experimental Electrical and Control Engineering Education, Lanzhou University of Technology, Lanzhou 730050, China)

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 [2]甘肃省工业过程先进控制实验室,甘肃兰州730050 [3]兰州理工大学电气与控制工程国家级实验教学示范中心,甘肃兰州730050

出　　处：《信息与控制》2019年第3期329-338,共10页Information and Control

基　　金：国家自然科学基金资助项目(61463030,61563031)

摘　　要：针对具有执行器故障和外界有限能量扰动的非线性网络化控制系统(NNCS),研究了离散事件触发通讯机制(DETCS)下的主—被动混合非脆弱容错控制器的设计问题。首先考虑了故障集,基于李亚普诺夫方法和状态反馈控制策略设计了被动非脆弱容错控制器,使得系统在发生已知故障类型时能够维持自身稳定,在发生未知故障初期减缓系统性能下降的速度。其次,基于H∞理论设计的故障估计器在线实时检测系统故障,一旦获得未知故障信息,立即重构控制器进行补偿,确保系统渐近稳定并满足性能指标。最后,仿真算例验证了所提方法的正确性和有效性。For nonlinear networked control system (NNCS) with actuator faults and external finite-energy disturbances, we present the design of a hybrid active-passive non-fragile fault-tolerant controller under discrete event-triggered communication scheme (DETCS). First, we consider the fault set and design a passive non-fragile fault-tolerant controller based on the Lyapunov method and the state feedback control strategy. The designed controller not only enables the NNCS to maintain its stability when the known fault types occurs, but also slows down the system performance degradation at the initial stages of unknown faults. Second, based on the theory, we design a fault estimator to detect system failure online. Once the information of an unknown fault is obtained, the controller is reconstructed immediately to ensure the system stability and to meet performance index. Finally, the correctness and effectiveness of the method are verified by a simulation example.

关 键 词：混合容错控制 非脆弱 离散事件触发通讯机制(DETCS) 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程]