随机长延迟同步网络控制系统的建模与最优控制  

Modelling and Optimal Control of Synchronous Networked Control Systems with Long Random Delays

作　　者：李毅[1] 胡保生[1] 彭勤科[1] 

机构地区：[1]西安交通大学系统工程研究所机械制造系统工程国家重点实验室,陕西西安710049

出　　处：《信息与控制》2006年第3期346-354,共9页Information and Control

基　　金：国家自然科学基金资助项目(60175015)

摘　　要：讨论了具有随机长延迟的同步网络控制系统的建模问题,并提出了这类系统的通用模型.在模型的推导过程中,引入了数据包的有效到达时刻和等效到达时刻的概念.通过对数据包的实际到达时刻等效化处理,对数据包丢失或者在接收时顺序错乱等情况下的网络控制系统进行建模,从而推导出了通用的网络控制系统模型.在此基础上利用状态预测和动态规划设计出了长延迟网络控制系统的最优控制器,并通过实例证明其有效性.*This paper discusses the modelling of synchronous networked control systems （NCSs） with long random network-induced delays, and proposes a general model for these NCSs. In the process of modelling, the concepts of the effective arrival instant and the equivalent arrival instant of signals are introduced. Through the equivalent treatment of the actual arrival instant of packets, we construct a model for the NCSs in which the packets might be lost or received disorderly, and present a general model of NCSs. Based on this general model, we design an optimal controller for synchronous NCSs with long random delays with the help of state prediction and dynamic programming. The effectiveness of the controller is validated with an example.

关 键 词：网络控制系统 随机长延迟 有效到达时刻 等效到达时刻 最优控制 状态预测 动态规划 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]