基于死区调度的无线网络控制系统保性能控制器设计  

Guaranteed Cost Controller Design for Wireless Networked Control Systems Based on Deadband Scheduling

作　　者：高政南[1] 谢蓉华[1] 陈庆伟[1] 

机构地区：[1]南京理工大学自动化学院,江苏南京210094

出　　处：《信息与控制》2012年第4期522-528,共7页Information and Control

基　　金：国家自然科学基金资助项目(60975075);教育部博士点专项基金资助项目(20070288022);江苏省自然科学基金资助项目(BK2008404)

摘　　要：针对无线网络控制系统(WiNCS)中网络带宽有限、节点能量有限、网络冲突概率高和节点动态移动的特点,提出了基于系统误差的死区调度策略,即只在系统误差绝对值大于死区阈值时才进行控制量的计算和传输.将死区调度描述为一个非线性函数,并在考虑系统参数不确定性和网络诱导时延的情况下,建立了基于死区调度的无线网络控制系统模型.利用Lyapunov-Krasovskii方法,给出了保性能控制器的设计方法.仿真实验结果表明所提方法在保证控制性能的基础上有效地降低了控制器的数据传输率.A deadband scheduling policy based on system errors is presented for wireless networked control systems （WiNCS）, in which the characteristics of WiNCS are considered, such as limited network bandwidth, limited node energy, high network collision probability and dynamic mobile node. The control variable is computed and transmitted only if the absolute value of system error is larger than the given threshold of deadband. The model of WiNCS based on deadband scheduling with parametric uncertainties and network-induced delay is established, in which the deadband scheduling is described by the nonlinear function. And the guaranteed cost controller is designed by using Lyapunov-Krasovskii methods. The results of simulative experiments indicate that the data transmission rate of the controller is reduced efficiently by the proposed approach, and the control performance is guaranteed.

关 键 词：无线网络控制系统 死区 调度 非线性 保性能控制 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]