Liu Yang, Liu Xiaoping, Jing Yuanwei, Zhang Ziye, Chen Xiangyong
College of Information Science and Engineering, Northeastern University, Shenyang 110819, Liaoning, PR China; Department of Electrical Engineering, Lakehead University, Thunder Bay, P7B 5E1, Ontario, Canada.
Department of Electrical Engineering, Lakehead University, Thunder Bay, P7B 5E1, Ontario, Canada.
ISA Trans. 2019 Jun;89:131-138. doi: 10.1016/j.isatra.2018.12.021. Epub 2019 Jan 2.
An H congestion tracking control problem for nonlinear transmission control protocol/active queue management (TCP/AQM) network is proposed in this paper. Inspired by the existing network models, a modified TCP/AQM network model with external disturbance and modelling uncertainty is first introduced. And then, a novel function for the desired queue length is defined for the first time, which can simulate the changes in the queue length during a day. Next, a novel AQM scheme is presented to control network congestion by combining H theory and integral backstepping technique. The proposed method guarantees that the better tracking performance of the queue is achieved, and all the signals are asymptotically stable in the closed-loop system in probability. Finally, the effectiveness of the presented algorithm is tested by simulation results.
本文提出了一种针对非线性传输控制协议/主动队列管理（TCP/AQM）网络的H∞拥塞跟踪控制问题。受现有网络模型的启发，首先引入了一种具有外部干扰和建模不确定性的改进TCP/AQM网络模型。然后，首次定义了一种新颖的期望队列长度函数，该函数可以模拟一天中队列长度的变化。接下来，提出了一种新颖的AQM方案，通过结合H∞理论和积分反推技术来控制网络拥塞。所提方法保证了队列具有更好的跟踪性能，并且在闭环系统中所有信号在概率意义下渐近稳定。最后，通过仿真结果验证了所提算法的有效性。
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