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1.
基于Riccati方程解的存在条件,建立了离散系统H滤波问题的最优范数γopt与相关的Hamiltonian差分方程一阶特征值,以及矩阵广义特征值问题一阶特征值之间的对应关系.根据这一关系可以用求解特征值问题的算法计算最优H范数.由于仅需计算一阶特征值,所以可用扩展Wittrick-Williams算法求解这一问题.  相似文献   

2.
具有时滞的奇异系统H控制   总被引:2,自引:0,他引:2  
针对具有时滞的奇异系统H输出反馈控制问题, 利用Lyapunov泛函方法, 得到闭环系统稳定且具有H-范数界γ的充分条件, 基于相应的LMI可行解给出了动态控制器显式表示. 最后, 数值例子表明了该方法的正确性.  相似文献   

3.
一类不确定非线性系统的鲁棒H控制   总被引:1,自引:0,他引:1  
在一种工程应用背景之下, 考虑了一类非线性系统的鲁棒H 控制问题, 不确定性范数有界, 基于HJI不等式研究了状态反馈控制器设计问题, 使得闭环系统满足H 干扰抑制性能要求.  相似文献   

4.
混合H2/H鲁棒控制器设计   总被引:3,自引:2,他引:3       下载免费PDF全文
在状态空间描述下,定义了混合H2/H控制的完整信息、完整控制、干扰顺馈、输出估计这4种典型情况.在二次稳定意义上,讨论了混合H2/H的性能指标,及这4种典型情况的混合H2/H线性反馈控制器设计,给出了充分必要条件.在典型情况分析的基础上,研究一般意义上的混合H2/H反馈控制器设计.H2和H的干扰输入阵及性能评价函数各不相同时的混合H2/H反馈控制器,与H2和H控制器设计相似,归结为解两个Riccati方程.但这两个Riccati方程含有参数,最优解要通过搜索这两个参数得到.结果包含了单纯的H2和H设计,可看作是H2,H和混合H2/H的统一设计方法.最后通过一个简单的例子,说明了控制器设计方法的可行性.  相似文献   

5.
基于模糊模型的时滞不确定系统的模糊H鲁棒反馈控制   总被引:4,自引:0,他引:4  
讨论了一类具有状态和控制时滞的不确定非线性系统的模糊H 状态反馈控制问题. 采用具有时滞的不确定Takagi-Sugeno(T-S)模糊模型对非线性系统进行建模, 提出了一套基于LMI的模糊鲁棒控制器的系统设计方法, 给出了模糊H状态反馈控制器存在的充分条件, 以保证闭环模糊系统渐近稳定并满足从干扰输入到控制输出的H范数界约束. 示例仿真表明了该方法的有效性.  相似文献   

6.
反馈控制系统多性能约束指标的相容性   总被引:8,自引:0,他引:8  
对一类线性随机系统的状态反馈控制, 研究极点配置指标、被控输出对范数有界外扰的H抑制指标及稳态状态方差上界指标的相容性, 希望为实际控制系统多性能指标的选定提供理论依据, 用线性矩阵不等式(LMI)方法分别刻画了极点指标约束下H指标的取值范围、以及相容极点指标和H指标约束下稳态方差上界指标的取值范围, 对上述三类相容指标约束的控制问题给出求取满意控制策略的有效方法. 文中结论用数值算例作了说明.  相似文献   

7.
研究了具有范数有界不确定性的广义系统的弹性H控制问题. 首先证明了广义系统的有界实引理可以用一个严格的线性矩阵不等式来描述. 在此基础上, 针对控制器存在加性摄动的情形, 以严格线性矩阵不等式约束条件给出了弹性H状态反馈控制器存在的充分必要条件, 并给出了控制器的显式表示. 算例验证了本文方法的可行性.  相似文献   

8.
时延网络化控制系统的H2/H混合控制   总被引:3,自引:1,他引:3       下载免费PDF全文
针对存在多步随机传输时延的网络化控制系统模型 ,研究了其随机稳定性及H2/H混合控制问题 .在一定的系统通信控制模式下 ,网络传输时延可以建模为一个马尔可夫随机过程 ,通过增广系统状态的方法将原系统转化为一个具有随机跳变系数的离散系统 ,同时通过建立随机跳变Lyapunov函数 ,构建了满足系统随机稳定的H次优和H2/H混合控制状态反馈控制器 .该控制器可通过求解一组耦合的矩阵不等式而得 .  相似文献   

9.
状态滞后线性系统的H状态反馈控制器   总被引:1,自引:0,他引:1  
利用LMI(线性矩阵不等式 )的方法, 首先给出了一般的状态滞后自治系统内稳定且具有H范数界的一个充分条件. 并由此得到了一般的状态滞后系统H问题有解的一个充分条件, 通过解LMI可以获得控制器的解. 最后举例说明方法的正确性.  相似文献   

10.
具有状态和测量时滞不确定系统的鲁棒H状态估计   总被引:1,自引:0,他引:1  
考虑一类已知状态和测量时滞且范数有界参数不确定连续时间系统的鲁棒H状态估计问题. 这个问题解的充分条件由二个代数Riccati不等式给出, 它可以保证存在一个渐近稳定状态估计器使得对于所有不确定性从外界干扰到输出估计误差的传递函数满足指定的H指标. 以上这些结果可以推广到一类未知状态和测量时滞且范数有界参数不确定连续系统的鲁棒H状态估计问题, 对于已知状态和测量时滞系统, 所得状态估计器与参数不确定性无关, 而与时滞有关. 对于未知状态和测量时滞系统, 其状态估计器不仅与参数不确定性无关, 而且与时滞也无关.  相似文献   

11.
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.  相似文献   

12.
European Community policy and the market   总被引:1,自引:0,他引:1  
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.  相似文献   

13.
融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。  相似文献   

14.
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.  相似文献   

15.
This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.  相似文献   

16.
Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008  相似文献   

17.
为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.  相似文献   

18.
Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.  相似文献   

19.
《计算机科学》2007,34(4):148-148
Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.  相似文献   

20.
This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)SM and Team Software Process (TSP){SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.  相似文献   

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