加载柔性臂振动的非线性应力反馈控制

用数值仿真的方法讨论了一种用新型的非线性应力反馈律来镇定加载柔性臂振动的问题。该方法使用跟踪微分器取得柔性臂根部应力信号的微分信号,并与根部应力信号一起组成非线性控制输入来控制加载柔性臂的振动.其镇定效果明显地优于有关问题的现有实验结果。     

网络图广义连通性的基本性质与常见连通结构

网络图的广义连通性是通常连通性的推广,它反映了网络图顶点（元素）间一类更为广泛层面上的内在联系,本文通过决策判断信息的网络系统分析,研究了网络图广义连通性的基本性质,并通过考察相应的信息结构特征,给出了广义连通性几种常通结构类型。     

Fixed-Orderl1-Control for Systems with Time-Delay

1. INTRODUCTIONPhysical plaaes are inevitably affected by exogenous disturbance, hence rejecting disturbanceis important. Ffor example, HOO-control systems can reject the LZ disturbance. But in factthere are maily species of disturbances: some are LZ-attenuation; some are stochastic; andsome are Loo(loo) [6]. If the exogenous disturbance is modeled as the energy-bounded signal, and the performance is the output energyt that is Hoo problem. If the performance isoutput energy, that is p…     

The Optimum Model and Its Decision Support System of Coal Quality Balance

1　 Coal Quality Balance and Its Significance[1]Coal quality balance is to make a comprehensive plan concerning excavation steps and coalamount disposition of different coal seams based upon the natural coal-preservation stateand its relation with mining engineering in the three dimensional space so as to have thequality of coal excavated from different districts blended and coordinated the greatestextent possible and ensure the coal quality uniformity and stability,thus raise economicand soc…     

磁悬浮开关磁阻电机径向位置解耦及仿真研究

在深入分析磁悬浮开关磁阻电机(BSRM)径向力模型的基础上,针对BSRM径向位置两自由度上的相互耦合情况,采用反馈线性化方法进行了动态解耦,设计了解耦算法,并对解耦后的线性子系统进行了闭环设计。在Matlab7.0/Simulink环境下进行了整个径向位置控制系统的仿真建模。仿真结果显示,反馈线性化解耦可保证BSRM在径向两自由度上实现独立控制,且闭环系统具有良好的动、静态性能。     

Best weight pattern evaluation based security constrained power dispatch algorithm

This paper presents a methodology which determines the allocation of power demand among the committed generating units while minimizes number of objectives as well as meets physical and technological system constraints. The procedure considers two decoupled problems based upon the dependency of their goals on either active power or reactive power generation. Both the problems have been solved sequentially to achieve optimal allocation of active and reactive power generation while minimizes operating cost, gaseous pollutants emission objectives and active power transmission loss with consideration of system operating constraints along with generators prohibited operating zones and transmission line flow limits. The active and reactive power line flows are obtained with the help of generalized generation shift distribution factors （GGDF） and generalized Z-bus distribution factors （GZBDF）, respectively. First problem is solved in multi-objective framework in which the best weights assigned to objectives are determined while employing weighting method and in second problem, active power loss of the system is minimized subject to system constraints. The validity of the proposed method is demonstrated on 30-bus IEEE power system.     

ROBUST H∞ CONTROL FOR UNCERTAIN NONLINEAR SYSTEMS

This paper studies the robust H∞ disturbance attenuation with internal stability for uncertain nonlinear control systems. By adding one power integrator technique, this paper designs a explicit smooth robust dynamic feedback law while rejecting the disturbance to any specified degree of accuracy. Further, the example and simulation results show the effectiveness of the proposed schemes.     

基于DEA方法的额外资源分配算法

研究基于DEA(数据包络分析)方法的资源分配问题.求解该类问题的难点在于:对于参与分配的决策单元来说,其分得的额外资源数不仅依赖于该决策单元的相对效率值,还依赖于它的规模大小,因此分配权重难以确定.根据输入、输出指标数的分布情况,建立了3种基本模型,分别是单输入单输出、多输入单输出、单输入多输出模型,给出了这3种模型的资源分配权重的确定算法.最后给出实例,并对给出的分配原则的合理性进行了分析讨论.     

动态输出反馈网络控制系统鲁棒控制器设计

研究了具有不确定时延的动态输出反馈网络控制系统鲁棒控制器设计问题.考虑小于等于一个采样周期的不确定时延,将动态输出反馈网络控制系统建模为含有不确定性的离散时变系统.利用Lyapunov理论和矩阵不等式方法,推导出系统鲁棒控制律存在的条件,并转化为矩阵不等式表示的可行性问题,从而可利用Matlab LMI工具箱来求解,以便构造鲁棒控制律.Matlab仿真算例说明分析方法和结果是有效可行的.     

一种新型的非线性随机大系统自适应镇定方法

研究了一类具有严反馈形式并含有Wiener噪声扰动的非线性随机大系统,其互联项满足线性增长约束。利用微分几何的理论,应用Backstepping算法,基于Lyapunov稳定性理论,选择了适合这类组合非线性系统的状态观测器,设计了自适应输出反馈分散控制律和自适应律,使得闭环,互联的非线性随机大系统实现了概率意义下的全局稳定,仿真结果表明了控制算法的有效性。