具有不可靠链路的通信网最佳可靠路由的确定

研究了对给定拓扑结构的通信网在假定节点完全可靠而边存在随机破坏的情况下,通过计算点对间的路由概率确定最佳可靠路由的两种算法———邻接矩阵算法和动态路由算法－ 邻接矩阵算法通过构造网络的邻接矩阵及一些相关矩阵,利用深度优先搜索的方法找到点对间的所有路由,进而计算各路由的概率并由此确定最佳可靠路由－ 动态路由算法则给出了在链路失效后,按照最短路径原则由失效链路的起始点重新构造最佳可靠路由的方法－ 图１,参５－     

Robust reliable guaranteed cost control for nonlinear singular stochastic systems with time delay

To study the design problem of robust reliable guaranteed cost controller for nonlinear singular stochastic systems, the Takagi-Sugeno （T-S） fuzzy model is used to represent a nonlinear singular stochastic system with norm-bounded parameter uncertainties and time delay. Based on the linear matrix inequality （LMI） techniques and stability theory of stochastic differential equations, a stochastic Lyapunov function method is adopted to design a state feedback fuzzy controller. The resulting closed-loop fuzzy system is robustly reliable stochastically stable, and the corresponding quadratic cost function is guaranteed to be no more than a certain upper bound for all admissible uncertainties, as well as different actuator fault cases. A sufficient condition of existence and design method of robust reliable guaranteed cost controller is presented. Finally, a numerical simulation is given to illustrate the effectiveness of the proposed method.     

Robust reliable H∞ control for discrete-time Markov jump linear systems with actuator failures

The robust reliable H∞ control problem for discrete-time Markovian jump systems with actuator failures is studied. A more practical model of actuator failures than outage is considered. Based on the state feedback method, the resulting closed-loop systems are reliable in that they remain robust stochastically stable and satisfy a certain level of H∞ disturbance attenuation not only when all actuators are operational, but also in case of some actuator failures, The solvability condition of controllers can be equivalent to a feasibility problem of coupled linear matrix inequalities （LMIs）. A numerical example is also given to illustrate the design procedures and their effectiveness.     

不确定时滞系统的指数稳定保代价可靠控制

针对一类含有时变时滞的不确定参数系统,研究了在执行器发生故障情况下系统指数稳定保代价可靠控制器设计问题。系统的性能函数是含有指数项和故障输入项的积分二次型函数。经过适当的状态变换,将原系统的指数稳定保代价可靠控制问题转化为另一个等价系统的保代价可靠控制问题。根据Lyapunov稳定性理论,得到了系统存在指数稳定保代价可靠控制器应满足的一个矩阵不等式,进一步将这个矩阵不等式转化为线性矩阵不等式(LMI),并给出了系统的保代价表达式。利用论文方法设计的控制器能够使得时滞系统对于任意允许的不确定量以及执行器故障都保持鲁棒可靠指数稳定,并且使系统具有保代价的性能指标。仿真结果表明了该控制器设计方法的有效性。     

导弹攻防对抗仿真系统信息交互的方法研究

对抗双方公平、准确、符合实际的信息交互是导弹攻防对抗仿真系统必须着重考虑的问题,本文在对系统交互信息进行分类的基础上,对此问题进行了研究。利用有效空间法对实体进行了分组以实现组通信,降低了分布式仿真的网络流通量;利用信号仿真器的方法解决了信息传输的公正性问题。建立导弹攻防对抗仿真演示系统的实践表明本文所讨论的方法是有效可行的。     

基于LMI的直升机线性二次型可靠控制律设计

提出了一种新的直升机执行机构故障状况下的可靠飞行控制律设计与仿真方法。建立了正常情况下和故障情况下的直升机数学模型。通过迭代线性矩阵不等式方法（ILMI）求解基于线性二次型的直升机可靠控制律,使得直升机在正常情况和故障情况下均能取得满意的性能指标。通过与标准线性二次型方法设计的最优控制律进行仿真比较,证明所设计的直升机可靠控制律安全有效。     

LMI approach to reliable H∞ control of linear systems

The reliable design problem for linear systems is concerned with. A more practical model of actuator faults than outage is considered. An LMI approach of designing reliable controller is presented for the case of actuator faults that can be modeled by a scaling factor. The resulting control systems are reliable in that they provide guaranteed asymptotic stability and H∞ performance when some control component (actuator) faults occur. A numerical example is also given to illustrate the design procedure and their effectiveness. Furthermore, the optimal standard controller and the optimal reliable controller are compared to show the necessity of reliable control.     

论《孔乙己》的叙述者

针对《孔乙己》叙述说法不一的情况,我们认为《孔乙己》作为第一人称回忆性叙述本,其中小伙计“我”必然包含两个自我,即叙述自我和经验自我。真正的叙述应为叙述自我,而且是可靠的。由此,我们还可以看到本体现出的对孩子的关注意识和作强烈的自省意识。     

具有冗余执行机构的不确定非线性系统的H∞状态反馈可靠控制

研究了具有冗余执行机构的不确定非线性系统的H_∞状态反馈可靠控制问题.用耗散理论,基于Hamil-ton Jocabi不等式,得到了非线性H_∞状态反馈可靠控制问题可解的充分条件及控制器的设计算法.     

IP多播在数字视频监控系统中的实现

围绕ＩＰ多播在数字视频监控系统中的实现,深入讨论了系统引入ＩＰ多播技术所涉及的一系列关键技术及其相关的实现方法,ＩＰ多播流程的建立、基于Ｗｉｎｓｏｃｋ的ＩＰ多播技术的实现步骤、舆层协议的选择、网络流量控制策略以及用户权限控制的实现等技术在文中都提供了其具体的解决办法,该系统采用Ｄｉｇｉｔａｌ ２１２３０芯片硬件实现音视频ＭＰＧＥ－１标准的实时压缩,应用软件实时解压缩以及系统多功能操作等,软件基于Ｗ