NCS新型离散事件触发通讯与少保守性鲁棒H_∞容错协同设计  

Co-design Between New Event-triggered Communication Scheme and Less Conservative Robust H_∞ Fault-tolerant Control for Networked Control Systems

作　　者：李炜[1] 翟鹏飞[1] 李亚洁[1] Li Wei Zhai Pengfei Li Yajie(College of Electrical and Information Engineering, Lanzhou University of Technology, Lanzhou 730050, Chin)

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：《系统仿真学报》2017年第4期740-751,共12页Journal of System Simulation

基　　金：国家自然科学基金(61364011);甘肃省自然科学基金(1308RJZA418)

摘　　要：针对现有网络化控制系统(networked control systems,NCS)依赖网络固有资源进行容错控制设计方法的局限性,以及多性能指标约束下控制器设计的保守性问题,分析了现有离散事件触发通讯机制对系统性能负面影响,提出了一种具有动稳过程协调约束的离散事件触发通讯机制,并在该机制下建立了闭环故障模型,并结合改进的Wirtinger不等式与改进的互反凸组合引理等技术,获得了NCS的新型离散事件触发通讯机制与鲁棒H_∞容错控制的协同设计方法;最后以仿真算例验证了本文方法在确保系统性能、节约网络通讯资源与减少控制器保守性方面的优越性。文中触发条件的设计物理意义明确,触发参数便于选取,动稳兼顾的属性在确保系统性能的前提下能更有效地节约网络通讯资源。Based on the analysis for the disadvantage of the current discrete event-triggered communication schemes, a new kind of event-triggered communication scheme constrained by transient and stead-state process was proposed to perfect the conservatism and isolation of the fault-tolerant controller. A closed-loop failure model which was concerned with state-error was established for networked control system. Using the improved Wirtinger＇s inequality and the improved reciprocally convex combination inequality, the co-design between new event-triggered communication scheme and less conservative robust H∞ fault-tolerant control for networked control systems was focused on. The simulation results show that the new discrete event-triggered communication scheme can save more network communication resource without deteriorating the system performance excessively. At the same time, the controller has less conservatism and becomes more easily to acquire. The triggering condition designed has a definite physical meaning and parameters are more likely to choose.

关 键 词：网络化控制系统 离散事件触发通讯机制 H∞容错控制 协同设计 

分 类 号：TP302.8[自动化与计算机技术—计算机系统结构]