鲁里叶系统鲁棒输入输出稳定性的H∞范数摄动界

讨论了一般鲁里叶系统的鲁棒输入、输出稳定性问题.利用H∞范数与互质因子摄 动两种度量方法给出了鲁里叶系统在线性部分与非线性部分同时有摄动时,系统仍能保持输 入、输出稳定性的摄动量上界估计式,并用两个例子说明了该摄动界的有效性.     

GeoMap地质制图系统开发与应用

ＧｅｏＭａｐ地质制图系统开发与应用中国石油天然气总公司北京石油勘探开发科学研究院１ＧｅｏＭａｐ地质制图系统简介近年来，随着计算机应用技术的迅猛发展，石油行业的图形管理、编制也逐渐实现计算机化。在这种情况下，考虑到地质研究工作的数据具有容量大、来源多、...     

时变不确定连续时间LQG系统的鲁棒稳定性

本文讨论连续时间ＬＱＧ系统的鲁棒稳定性问题，该系统用常规的状态空间方程进行描述，但同时包含有时变系统摄动和噪声不确定性，因而刻划了一般实际系统的特征。文中给出了判别这类系统鲁棒稳定性的条件，它比已有的有关结论更简单、有效。     

基于模糊集贴近度的模糊推理系统摄动研究

目前对模糊推理系统规则摄动度量都是基于蕴涵关系进行研究的,而蕴涵算子选取不当必然会导致规则摄动出现误差。多数模糊推理算法也是基于蕴涵关系,这些算法因涉及模糊关系矩阵运算而使算法的计算过程比较复杂,有时推理结果和实际相差甚远。采用一种度量模糊推理系统规则摄动的新方法分析模糊推理系统的摄动,该方法不再使用蕴涵算子,而是基于规则摄动前后模糊集合的贴近度来度量,与以往的方法有着本质的不同,推理结果更贴合实际情况。     

奇异摄动系统H∞问题的进一步研究*

本文给出奇异摄动系统Ｈ∞问题有解的一个简洁的ε－独立充要条件，并给出Ｈ∞控制器的具体形式。同时本文证明该控制器料具有奇异摄动性，并且其快、慢部分分别为原系统的快、慢子系统之Ｈ∞问题的次优控制器。本文结果亦适用于非标准摄动情形。     

GIS构件及其在城镇公安综合管理信息系统中的应用

本文提出了传统ＧＩＳ应用系统开发中所存在的问题,以此介绍了ＧＩＳ构件在应用系统开发中的特点,并以ＭａｐＩｎｆｏ公司的构件产品 ＭａｐＸ为例,详细阐述 ＴＧＩＳ构件在城镇公安综合管理信息系统（ＰＳＧＩＳ）中的应用。     

GIS构件及其在城镇公安综合管理信息系统中的应用

本文提出了传统ＧＩＳ应用系统开发中所存在的问题,以此介绍了ＧＩＳ构件在应用系统开发中的特点,并以ＭａｐＩｎｆｏ公司的构件产品ＭａｐＸ为例,详细阐述了ＧＩＳ构件在城镇公安综合管理信息系统中的应用。     

使用MapX组件实施地理图形与数据库的结合

针对使用ＭａｐＸ组件开发配电网地理信息系统（Ｇｅｏｇｒａｐｈｉｃ Ｉｎｆｏｒｍａｔｉｏｎ Ｓｙｓｔｅｍ,简称ＧＩＳ）的背景,讨论了实现地理图形与数据库结合的思路与方法,首先介绍了ＭａｐＸ组件的模型结构,然后分析了ＭａｐＩｎｆｏ（ＭａｐＸ）的空间数据结构,最后着重研究了使用ＭａｐＸ组件在双服务器模式下实现地理图形与数据库结合的方法。     

作用MapX组件实现地理图形与数据库的结合

针对使用ＭａｐＸ组件开发配电网地理信息系统（Ｇｏｏｇｒａｐｈｉｃ Ｉｎｆｏｒｍａｔｉｏｎ Ｓｙｓｔｅｍ,简称ＧＩＳ）的背景,讨论了实现地理图形与数据库结合的思路与方法,文章首先介绍了ＭａｐＸ组件的模型结构,然后分析了ＭａｐＩｎｆｏ（ＭａｐＸ）的空间数据结构,最后着重研究了使用ＭａｐＸ组件在双服务器模式下实现地理图形与数据库结合的方法。     

训练模式摄动对模糊形态学神经网络的影响

在构建神经网络时,采集的训练模式总存在摄动,如何度量这种摄动,提出模糊集摄动度量的新方法.众多学者研究的两类形态学联想记忆网络的存储能力和抗腐蚀/膨胀噪声的能力等性质几乎都相同,但基于这种模糊集摄动的度量方法,研究训练模式摄动对两类模糊形态学联想记忆网络的影响时发现,两类网络对训练模式摄动的鲁棒性差异很大,其中一类模糊...     

Stability criteria for large-scale systems

Recent research into large-scale system stability has proceeded via two apparently unrelated approaches. For Lyapunov stability, it is assumed that the system can be broken down into a number of subsystems, and that for each subsystem one can find a Lyapunov function (or something akin to a Lyapunov function). The alternative approach is an input-output approach; stability criteria are derived by assuming that each subsystem has finite gain. The input-output method has also been applied to interconnections of passive and of conic subsystems. This paper attempts to unify many of the previous results, by studying linear interconnections of so-called "dissipative" subsystems. A single matrix condition is given which ensures both input-output stability and Lyapunov stability. The result is then specialized to cover interconnections of some special types of dissipative systems, namely finite gain systems, passive systems, and conic systems.     

Connections between finite-gain and asymptotic stability

The relationship between input-output and Lyapunov stability properties for nonlinear systems is studied. Well-known definitions for the input-output properties of finite-gain and passivity, even with quite reasonable minimality assumptions on a state-space representation, do not necessarily imply any form of stability for the state. Attention is given to the precise versions of input-output and observability properties which guarantee asymptotic stability. Particular emphasis is given to the possibility of multiple equilibria for the dynamical system.     

Input-output decoupling with stability for Hamiltonian systems

The input-output decoupling problem with stability for Hamiltonian systems is treated using decoupling feedbacks, all of which make the system maximally unobservable. Using the fact that the dynamics of the maximal unobservable subsystem are again Hamiltonian, an easily checked condition for input-output decoupling with (critical) stability is deduced.     

The input–output version of the Aizerman–Myshkis problem for retarded systems

Non-linear retarded systems are considered. Conditions for the input-output stability are derived. They are formulated in terms of the zeros of the corresponding quasi-polynomials. In addition, it is proved that retarded systems with positive impulse (Green) functions satisfy the Aizerman-Myshkis conjecture in the input-output version.     

A normal form approach to approximate input-output linearizationfor maximum phase nonlinear SISO systems

A control synthesis scheme is presented for nonlinear single-input-single-output systems which have completely unstable (antistable) zero dynamics. The approach is similar in spirit to linear approaches for nonminimum phase systems and involves the derivation of an input-output linearizing controller for a suitably-defined nonlinear minimum phase approximation to the original system. The linearizing controller achieves an approximately linear input-output response and internal stability     

Input-output finite-time stability of time-varying linear singular systems

This paper studies the input-output finite-time stabilization problem for time-varying linear singular systems. The output and the input refer to the controlled output and the disturbance input,respectively.Two classes of disturbance inputs are considered,which belong to L-two and L-infinity.Sufficient conditions are firstly provided which guarantee the input-output finite-time stability.Based on this,state feedback controllers are designed such that the resultant closed-loop systems are input-output finite-time stable.The conditions are presented in terms of differential linear matrix inequalities.Finally,an example is presented to show the validity of the proposed results.     

Some remarks on the stability of Mamdani fuzzy control systems

This paper presents a passivity approach to the stability analysis of Mamdani fuzzy control systems. The main idea of the paper is that the fuzzy controller can be considered from an input-output viewpoint as a nonlinear dissipative operator. An input-output approach is provided by considering a dynamical dependency of inputs of the fuzzy controller. Then the passivity theory is applied in order to obtain conditions for absolute stability of the closed-loop control system     

结构未建模系统的变结构自适应控制器设计

本文对一类结构未建模的动态不确定系统，采用变结构控制与自适应控制相结合的方法，给出了一种鲁棒控制器设计方案。所提方案适用于系统已建模部分为非最小相位的系统，并能保证系统输入输出全局有界稳定。