针对网络系统中存在的阻碍网络通信问题,本文基于观测器,研究了一类非线性网络控制系统在非周期拒绝服务(denial of service,DOS)攻击下的控制问题。设计了一种弹性事件触发方案,并充分考虑非周期DOS攻击和事件触发方案的影响,基于T-S...针对网络系统中存在的阻碍网络通信问题,本文基于观测器,研究了一类非线性网络控制系统在非周期拒绝服务(denial of service,DOS)攻击下的控制问题。设计了一种弹性事件触发方案,并充分考虑非周期DOS攻击和事件触发方案的影响,基于T-S模糊模型,建立了一种切换系统模型。通过构造Lyapunov-Krasovskii泛函,并基于线性矩阵不等式方法,分析了系统的渐近稳定性,提出了一种控制器和观测器的协同设计方法。最后,以文献[13]中的卡车拖车系统为例,通过Matlab的LMI工具箱进行仿真验证。仿真结果表明,切换系统在非周期的DOS攻击下是渐进稳定的,验证了所得结果的有效性。该研究对非线性网络控制系统抵抗外部攻击具有重要意义。展开更多
An effective spot beam handover trigger and channel allocation scheme is proposed for GEO mobile satellite communication based on its characteristic and application. By using both signal strength and terminal location...An effective spot beam handover trigger and channel allocation scheme is proposed for GEO mobile satellite communication based on its characteristic and application. By using both signal strength and terminal location information, necessary handover is triggered promptly and accurately to reduce the negative effect of long signaling delay. Then handover decision is made with the handover queuing and channel allocation strategy. An adaptive channel resource allocation scheme is considered to optimize resource utilization with guarantee of emergency communication, which is significant for emergency rescue and disaster relief. Simulation results show that the proposed scheme prevents unnecessary handover effectively and has favorable adaptability to emergent requirement of satellite communication.展开更多
文摘针对网络系统中存在的阻碍网络通信问题,本文基于观测器,研究了一类非线性网络控制系统在非周期拒绝服务(denial of service,DOS)攻击下的控制问题。设计了一种弹性事件触发方案,并充分考虑非周期DOS攻击和事件触发方案的影响,基于T-S模糊模型,建立了一种切换系统模型。通过构造Lyapunov-Krasovskii泛函,并基于线性矩阵不等式方法,分析了系统的渐近稳定性,提出了一种控制器和观测器的协同设计方法。最后,以文献[13]中的卡车拖车系统为例,通过Matlab的LMI工具箱进行仿真验证。仿真结果表明,切换系统在非周期的DOS攻击下是渐进稳定的,验证了所得结果的有效性。该研究对非线性网络控制系统抵抗外部攻击具有重要意义。
基金Supported by the High Technology Research and Development Programme of China (No. 2008AA011102) and the National Natural Science Foundation of China ( No. 60772112).
文摘An effective spot beam handover trigger and channel allocation scheme is proposed for GEO mobile satellite communication based on its characteristic and application. By using both signal strength and terminal location information, necessary handover is triggered promptly and accurately to reduce the negative effect of long signaling delay. Then handover decision is made with the handover queuing and channel allocation strategy. An adaptive channel resource allocation scheme is considered to optimize resource utilization with guarantee of emergency communication, which is significant for emergency rescue and disaster relief. Simulation results show that the proposed scheme prevents unnecessary handover effectively and has favorable adaptability to emergent requirement of satellite communication.