A switched system approach is proposed to model networked control systems （NCSs） with communication constraints. This enables us to apply the rich theory of switched systems to analyzing such NCSs. Sufficient condit...A switched system approach is proposed to model networked control systems （NCSs） with communication constraints. This enables us to apply the rich theory of switched systems to analyzing such NCSs. Sufficient conditions are presented on the stabilization of NCSs. Stabilizing state/output feedback controllers can be constructed by using the feasible solutions of some linear matrix inequalities （LMIs）. The merit of our proposed approach is that the behavior of the NCSs can be studied by considering switched system without augmenting the system. A simulation example is worked out to illustrate the effectiveness of the proposed approach.展开更多
随着云业务、视频业务和移动互联业务的快速发展,5G光接入网对于传输容量的需求日益迫切。接入网段日益增长的带宽需求不仅要求更高的传输速度,还需要保持较低的系统成本。但是成熟的商用低成本光电器件的带宽通常是有限的,当传输速率...随着云业务、视频业务和移动互联业务的快速发展,5G光接入网对于传输容量的需求日益迫切。接入网段日益增长的带宽需求不仅要求更高的传输速度,还需要保持较低的系统成本。但是成熟的商用低成本光电器件的带宽通常是有限的,当传输速率很高时,带宽明显小于信号的波特率。考虑到低成本光学器件的有限带宽,采用具有高频谱效率的先进调制格式,如PAM,CAP以及DMT是很有潜力的选择。主要针对光接入网器件带宽受限的问题,在带宽受限的100 G无源光网络中,仿真对比了三种先进调制格式的性能,分析了三种调制格式传输20 km SSMF后的接收灵敏度和功率预算,还讨论了他们的热噪声性能和抗色散性能。展开更多
针对网络控制系统(Networked Control System,NCS)中普遍存在的有限带宽和信息量化问题,采用基于模型的控制策略,研究了量化状态反馈下一类网络控制系统的稳定性。分析了量化误差、更新时间、模型误差对系统稳定性的影响,并给出了系统...针对网络控制系统(Networked Control System,NCS)中普遍存在的有限带宽和信息量化问题,采用基于模型的控制策略,研究了量化状态反馈下一类网络控制系统的稳定性。分析了量化误差、更新时间、模型误差对系统稳定性的影响,并给出了系统模型状态、对象状态的稳定域范围。仿真结果表明了结论的正确性。展开更多
基金This work is supported by the National Natural Science Foundation of China (No. 60528007, 10372002, 60274001, 60304003), the National KeyBasic Research and Development Program (No. 2002CB312200).
文摘A switched system approach is proposed to model networked control systems （NCSs） with communication constraints. This enables us to apply the rich theory of switched systems to analyzing such NCSs. Sufficient conditions are presented on the stabilization of NCSs. Stabilizing state/output feedback controllers can be constructed by using the feasible solutions of some linear matrix inequalities （LMIs）. The merit of our proposed approach is that the behavior of the NCSs can be studied by considering switched system without augmenting the system. A simulation example is worked out to illustrate the effectiveness of the proposed approach.
文摘随着云业务、视频业务和移动互联业务的快速发展,5G光接入网对于传输容量的需求日益迫切。接入网段日益增长的带宽需求不仅要求更高的传输速度,还需要保持较低的系统成本。但是成熟的商用低成本光电器件的带宽通常是有限的,当传输速率很高时,带宽明显小于信号的波特率。考虑到低成本光学器件的有限带宽,采用具有高频谱效率的先进调制格式,如PAM,CAP以及DMT是很有潜力的选择。主要针对光接入网器件带宽受限的问题,在带宽受限的100 G无源光网络中,仿真对比了三种先进调制格式的性能,分析了三种调制格式传输20 km SSMF后的接收灵敏度和功率预算,还讨论了他们的热噪声性能和抗色散性能。
文摘针对网络控制系统(Networked Control System,NCS)中普遍存在的有限带宽和信息量化问题,采用基于模型的控制策略,研究了量化状态反馈下一类网络控制系统的稳定性。分析了量化误差、更新时间、模型误差对系统稳定性的影响,并给出了系统模型状态、对象状态的稳定域范围。仿真结果表明了结论的正确性。
