联防联动 有防有控——新一代的安检门系统

“有防无控”的金属探测通道的致命弊端，就是一旦暴徒持有危险品发生暴力行为时，给安检人员及周围群众带来不可想象的灾难性事故。本文介绍了一种将将安检系统和门控系统有机整合在一起的新系统、通过门的自动化控制，有效阻止暴力案件的发生。     

DJK—7500局部操作站组态系统的研制

本文叙述ＤＪＫ－７５００局部操作站组态系统的功能，说明了ＤＪＫ－７５００系统的数据结构，以及组态系统的实现。     

随机时变参数的随机逼近辨识及收敛性分析

本文讨论MIMO离散系统的随机时变参数基于随机逼近法的辨识问题。文中研究了参数估计和输出误差的收敛性并给出了初步的持续激励条件。在该条件下,证明了估计参数值和估计值与随机时变参数的统计均方差分别收敛于该随机时变参数的期望值和方差值。仿真结果表明了参数估计具有较好的收敛性与一致性。     

广义离散随机线性系统的状态估计

本文讨论了广义离散随机线性系统的状态估计问题,得到了一种比较实用的系统状态预测和滤波估计的递推算法。     

系统崩溃

不管你如何小心．Windows系统终有崩溃的时侯,此时我们多半是哭丧着脸向高手求教,得到的回答又往往是“重新安装系统”……唉,这可是无助又无奈。     

SCADA系统及其应用

介绍了ＳＣＡＤＡ系统的基本概念,详细分析了ＳＣＡＤＡ系统,与ＰＬＣ、ＤＣＳ系统进行了比较。并给出应用实例。     

傻子？

11月12日，GE Infrastructure、Seucrity宣布加入OSE(Open Security Exchange)组织，推动并发展安防产业界标准化的平台，让安防产业能够真正达到整台的目的。而要加入OSE组织，GE还必须支付每年15000美元(约合人民币12万元)的会员费。市场上有人就说：“花这么多钱加入一个目前成效还不明显的组织，这不是傻子吗?”     

韩国安防厂家力争领先行列

国际货币基金组织（IMF）最近对韩国国内生产总值增长的预估人5.5％降到了4.6%,预计明年这一数字更将降低到4％。衰弱的投资和消费情绪已经伤害了韩国的经济，其中了包括了安防行业。     

基于信息熵的非线性动态系统的宏观分析*

本文针对一类Ｉｔｏ型随机非线性动态系统，分别基于微观ＦＰＫ方程和宏观信息熵方法推断系统特性，进而分析系统的熵结构，结果表明，宏观方法不仅能获得与微观方法相似的结果，而且能以统一简洁的方式各类系统，通过对一类非线性动态系统的应用进一步说明宏观信息熵分析方法。     

不确定离散时间系统鲁棒稳定控制

根据Lyapunov稳定性定理,针对不确定离散时间系统鲁棒稳定状态反馈控制问题,提出 一种方法,即通过不确定矩阵秩1分解,计算加权矩阵,沿用线性最优调节器问题的Riccati代 数方程,设计鲁棒稳定调节器,并讨论了控制矩阵的不确定程度与鲁棒稳定调节器的存在性关 系问题.     

基于状态观测器的一类非线性系统的模糊鲁棒控制

利用T－S模型对一类非线性不确定系统进行模糊建模,在此基础上研究模糊鲁棒观测器及模糊状态鲁棒控制器的设计,并证明所设计的模糊鲁棒观测器和模糊状态鲁棒控制器具有全局渐近稳定性质。     

Robust stabilization of nonlinear cascaded systems

This paper considers the problem of robust stabilization for an uncertain nonlinear system which is a cascaded interconnection of two subsystems. Both of the subsystems are allowed to be nonlinear, multi-variable, and containing uncertain parameters. We present a new approach to designing stabilizing controllers which assure both robust global asymptotic stability and local quadratic stability. Compared with existing results, the assumptions required for such robust stabilizing controllers to exist are significantly simplified.     

Robust stabilizing regions of fractional-order PDμ controllers of time-delay fractional-order systems

This study investigates the robust stabilizing regions with stability degrees of fractional-order PD^μ controllers for time-delay fractional-order systems. By the D-decomposition technology, we identify the stabilizing regions by three types of curves, i.e., the real root boundary (RRB) curves, complex root boundary (CRB) curves and infinite root boundary (IRB) lines. The existence conditions and computing methods of RRB curves, CRB curves and IRB lines are proposed to determine the boundaries of the potential stabilizing regions. The Test Lines and the principle of the identifying the stabilizing regions are presented to find the real stabilizing regions with a given stability degree. To deal with noises existing in the feedback signals, fractional-order PD^μ controllers involving filers are adopted. Meanwhile, the robust stabilizing regions are also analyzed via IRB curves, CRB curves and IRB lines with stability degrees. Finally, some illustrative examples are offered to verify the effectiveness of depicting algorithms of the robust stabilizing regions for PD^μ controllers with no filer or filers, respectively.     

Robust Stabilization for Single-Input Polytopic Nonlinear Systems

This note deals with the stabilization problem of single-input polytopic nonlinear systems. The robust control Lyapunov function approach is used to derive a sufficient condition for the existence of time-invariant, continuous, asymptotically stabilizing state feedback controllers. The obtained sufficient condition is proven also necessary for the existence of stabilizing state feedback controllers such that the closed-loop system has a robust Lyapunov function for all possible uncertainties. In addition, a universal formula for constructing stabilizing controllers when the presented sufficient condition is met is provided. The results are illustrated by a numerical example.     

多输入非线性不确定系统的全局鲁棒自校正控制器的设计

本文讨论了多输入非线性时变不确定系统的鲁棒镇定问题，其中的未知参变量是以线性形式出现的，同时给出了鲁棒可稳定化自校正控制器的设计。     

不确定非线性时滞系统鲁棒镇定化研究

The systematic recursive design method of the robust stabilizing controller for general uncertain nonlinear time-delay systems is investigated in this paper. A delay-independent state feedback control law can be obtained by recursively constructing Lyapunov-Razumikhin function. It is shown that by some design techniques the obstacle that is intrinsic to the application of the Razumikhin condition can be removed such that the design of the robust stabilizing control law is free of any restriction for the systems.     

不确定非线性时滞系统鲁棒镇定的进一步结果

针对广义的不确定非线性时滞系统，研究了其鲁棒镇定控制器的系统的递归设计方法。通过递归地构造Lyapunov-Razumikhin函数获得了一种独立于延时的状态反馈控制律。证明了通过一些设计技术处理，由Razumikhin 条件的应用所带来的固有的设计障碍是可以被克服的，从而使得系统鲁棒镇定控制器的获得不需要任何对系统的限制条件。     

Synthesis of robust discrete systems based on comparison with stochastic model

The problem of synthesis of the stabilizing control for a discrete linear system with uncertain parameters is considered. The stochastic model of comparison with parametric noise is constructed; the mean-square stability of this model implies the stability of the system with uncertain parameters varying in a given domain. For the case of the state feedback, the methods of synthesis of the robust stabilizing control based on the solution of either linear matrix inequalities or an auxiliary optimization problem with constraints in the form of linear matrix inequalities are proposed. The converging iterative algorithm of synthesis of the robust stabilizing control for the case of the output feedback is proposed. An example is given.     

一类具有非线性不确定性的时滞系统鲁棒控制

研究一类具有非线性不确定参数以及状态滞后线性系统的时滞依赖鲁棒稳定性判据和鲁棒镇定问题。提出了新的鲁棒可镇定判据和相应的鲁棒无记忆状态反馈控制器设计方法,导出的时滞依赖结果以线性矩阵不等式的形式给出。