摘要
为了分析NCS中调度对控制性能的影响,研究了控制与调度协同设计时的保性能控制。首先,建立了输入、反馈端都具有通信约束的NCS调度模型,并利用通信序列来表示调度情况,将NCS中的不确定离散系统转化为不确定离散切换系统。在静态调度下,利用切换系统中的多Lyapunov函数方法,对系统的状态反馈保性能控制展开分析,并以LM I形式给出系统保性能控制律存在的充分条件。仿真表明,该方法可以用于分析不同调度情况对NCS保性能控制的影响。
In order to analyze the performance of control system which affected by scheduling in networked control system(NCS),guaranteed cost control(GCC) was researched integrating network scheduling.A scheduling model of NCS was established with communication constrain on input and feedback channels.Utilizing communication sequence to express the instance of scheduling,the model could be transformed into uncertain discrete time switch system.Under static scheduling,the research of guaranteed cost state feedback control was carried on utilizing the method of multiple Lyapunov function,and then the sufficient condition for the existence of guaranteed cost controller was derived via linear matrix inequalities(LMI).The results of simulation show that the method can be used to analyze the variation of guaranteed cost control in networked control systems with different scheduling sequence.
出处
《化工自动化及仪表》
CAS
北大核心
2009年第5期40-44,共5页
Control and Instruments in Chemical Industry
