时隙化网络控制系统的H_∞控制  

H_∞ control of time-slotted network control system

作　　者：肖力[1] 孙志刚[2] 朱德森[1] 陈绵云[1] 

机构地区：[1]华中科技大学控制科学与工程系,湖北武汉430074 [2]华中科技大学图像信息处理与智能控制教育部重点实验室,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2009年第7期70-74,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(60802002);华中科技大学985项目(985hust-13011)

摘　　要：针对网络控制系统提出一种时隙化控制策略,将系统的控制周期划分为多个时隙,利用时隙时间驱动执行器输出控制命令.将具有不确定通信延迟的网络控制系统转化为一类线性切换系统,切换系统由多个具有确定延迟的线性系统组成,从而简化了实时网络控制系统的分析模型.利用线性矩阵不等式方法建立了时隙化网络控制系统的随机稳定性判断条件,采用系统的H∞模测量网络控制系统的性能,通过求解凸优化问题得到控制器的H∞综合方法.数值仿真证实了这种控制策略的有效性.A new time-slotted control strategy to networked control system is presented. This strategy is implemented by dividing control period of system into several time slots, and the actuator updates output commands at the beginning of next time slot after receiving command data packets. The timeslotted system with random communication delays can be modeled as linear jump system which switching between several linear systems with constant delays, the system model is greatly simplified. Stochastic stability condition of time-slotted networked control system is established by using linear matrix inequality （LMI） approach. H∞ norm is used to measure system performance, and H∞ controller synthesis method is obtained by solving a convex optimization problem. The proposed results are tested hy some numerical simulations.

关 键 词：网络控制系统 时隙化 切换系统 通信延迟 H∞综合 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]