基于事件触发机制的NCS主被动混合鲁棒H∞容错控制  

Hybrid Active-passive Robust Fault-Tolerant Control for a Networked Control System Based on an Event-triggered Scheme

作　　者：王君[1] 李淑真[1,2] 李炜 

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]鹤壁天海电子信息系统有限公司,河南鹤壁458030

出　　处：《信息与控制》2017年第2期144-152,共9页Information and Control

基　　金：国家自然基金资助项目(61463030)

摘　　要：研究了在离散事件触发机制(DETCS)条件下,网络化控制系统(NCS)的主被动混合鲁棒H_∞容错控制设计方法.针对具有时变时延的不确定线性NCS,在受到外部有限能量扰动的影响下,基于离散事件触发通讯机制,分别设计了正常控制器和被动鲁棒H_∞容错控制器:正常控制器使系统正常运行时能具备良好的动态性能;而当系统发生故障时,通过瞬态切换函数切换至被动鲁棒H_∞容错控制器,确保系统在已知故障发生时不仅稳定而且具有一定的H_∞扰动抑制性能,未知故障发生初期减缓系统性能下降速度.同时,设计了鲁棒H_∞故障检测观测器,实时检测故障,利用自适应补偿控制消除未知故障对系统的影响.最后通过仿真算例验证了所提方法的可行性.We address a hybrid active-passive robust fault-tolerant control design method for a networked control system( NCS) based on a discrete event-triggered communication scheme( DETCS). Aimed at an uncertain linear NCS with time-varying delays influenced by an external disturbance with limited energy,we propose robust passive and normal controllers based on the DETCS. The normal controllers ensure that the system has good dynamic performance while the system operates normally. When faults occur by switching to the passive robust faulttolerant controller through a switching function,the system not only keeps steady but also has certain disturbance performance restrictions. In addition,it can also slow the decreasing speed of system performance during early periods of unknown faults. We also use the robust fault diagnosis observer to detect faults in real time and find that adaptive compensation control can eliminate the effect of any unknown fault. Finally,a simulation example is used to justify the feasibility of the proposed approach.

关 键 词：网络化控制系统离散事件触发机制混合鲁棒容错 H∞控制系统扰动抑制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]