一类不确定离散网络系统的全局滑模控制  

Global sliding mode control for a class of uncertain discrete-time network systems

作　　者：王宏伟[1] 井元伟[2] 

机构地区：[1]东北大学秦皇岛分校自动化系,河北秦皇岛066004 [2]东北大学信息科学与工程学院,辽宁沈阳110004

出　　处：《系统工程与电子技术》2011年第6期1367-1369,1406,共4页Systems Engineering and Electronics

基　　金：国家自然科学基金(60874024);秦皇岛科技计划项目(201001A011)资助课题

摘　　要：针对动态传输控制协议(transmission control protocol,TCP)网络的拥塞问题,基于离散全局滑模控制理论设计了一种主动队列管理(active queue management,AQM)算法,该算法消除了滑模控制的到达阶段,保证网络系统在整个控制过程中的鲁棒性。为了减弱离散指数趋近律的抖振现象,给出了一种改进的滑模趋近律,使得复杂的网络系统具有良好的性能。仿真结果验证了所设计的控制器对活动的TCP连接数、链路带宽及往返时延的不确定性具有很强的稳定性和鲁棒性。An active queue management（AQM） algorithm is presented based on discrete-time global sliding mode control to solve the problems of dynamic transmission control protocol（TCP） network congestion,which can remove the reaching phase from sliding mode control so as to guarantee the system robustness during the whole control process.An improved sliding mode reaching law is designed,which can weaken the chattering,and make the complex network systems to have well performance.Simulation results demonstrate that the proposed controllers have good stability and robustness with respect to the uncertainties of the number of active TCP sessions,link capacity and the round-trip time.

关 键 词：动态传输控制协议网络 拥塞控制 离散全局滑模控制 主动队列管理 鲁棒性 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]