基于连续滑模控制的主动队列管理算法及仿真

基于一种改进的滑模控制器提出了一种主动队列管理（AQM）算法。采用连续的滑模控制（SMC）方案来取代不连续的切换控制，消除了滑模控制中存在的抖振现象从而使队列跟踪性能得到改善．对于网络模型的不确定性、网络参数的时变性及非TCP适应流所引起的网络抖动试算法具有很强的鲁棒性。仿真结果表明该方法可以使队列长度快速收敛到设定值，同时使队列振荡最小，结果也表明在网络条件变化的情况下，该算法优于传统的PI控制和传统的滑模控制。

Active Queue Management Algorithm Based on Continuous Sliding Mode Controller and Its Simulation

An active queue management(AQM) scheme based on an improved sliding mode controller was designed.The chattering was eliminated via the replacement of the discontinuous switching in the sliding mode control(SMC) by a continuous input control,so it could improve the queue tracking behavior.The proposed method has strong robust against network modeling uncertainties,network parameters time varying fluctuations and non-TCP sessions disturbances.Simulation results demonstrate that it can lead to the convergence of the queue length to the desired value quickly and maintain the oscillation small.The results also show that the scheme is very robust against disturbance under various network conditions and outperforms traditional PI control and traditional sliding mode control significantly.