摘要
针对传输控制协议(TCP)网络系统存在不确定参数和非响应流干扰的情况,基于自适应全局滑模控制,设计一种非线性主动队列管理算法.采用全局滑模控制消除了滑模控制的到达阶段,保证了网络系统在整个控制过程的鲁棒性.采用径向基函数(RBF)网络直接逼近系统的总不确定可有效地减小估计误差.由于没有使用符号函数或饱和函数,不仅可以有效抑制系统的抖振,而且系统的响应更加平稳.仿真结果表明,该算法具有较好的鲁棒性和较快的系统响应.
For the transmission control protocol(TCP) network systems in the presence of uncertain parameters and unresponsive flows, a nonlinear active queue management algorithm is presented based on adaptive global sliding mode control. The global sliding mode control is used to eliminate the arrival stage of sliding mode control and ensure the robustness of network systems in the whole control process. The radial basis function(RBF) network is used to directly approximate the lumped uncertainties of the systems so that the estimation error is effectively reduced. Because the sign function and the saturation function are not used, not only the system chattering is effectively eliminated, but also the system response is smoother. Simulation results show that the proposed algorithm has good robustness and fast system response.
出处
《控制与决策》
EI
CSCD
北大核心
2012年第10期1557-1560,1565,共5页
Control and Decision
基金
国家自然科学基金项目(60274009)
国家高技术研究发展计划项目(2004AA412030)