分散事件触发NCS的H_∞控制器设计

H_∞ Controller Design of Decentralized Event-triggered NCS

针对具有时变时延的网络化控制系统(networked control system,NCS),提出一种新的分散事件触发通讯机制。该机制可以有效的节约网络资源并且不依赖于状态数据的完整信息,若干个空间分布式传感器结点采集状态数据的局部信息并根据子传输机制传输信号。本文首先建立包含网络时延和分散事件触发条件的闭环NCS模型,然后利用Lyapunov稳定性理论和线性矩阵不等式方法给出闭环系统渐近稳定的充分条件,进而给出H∞控制器和分散事件触发机制的协同设计方法,最后通过Matlab数值仿真验证该方法的有效性。

Aim at the networked control systems with time-varying delay （networked control system, NCS）,in order to save the limited network resources,decentralized event-trigger communication mechanism is introduced.This mechanism can effectively save network resources and does not depend on the complete information of state data, many spatially distributed sensors eollecte local information and transmit it according to sub-communication scheme.By establishing a closed-loop NCS model containing the delay and decentralized event-trigger, and using Lyapunov stability theory and liner matrix inequality approach,the sufficient condition is derived for the closed-loop system with asymptotic stability. Moreover, a method of codesign is given for H∞ controller and decentralized event-trigger mechanism. At last, a numerical simulation example is given to prove the effectiveness of the method.