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1.
董宇 《软件》2012,33(9):109-111
本文给出了闭环系统根轨迹存在分离点的充分必要条件.研究表明,根轨迹的分离点可位于复平面上的任意位置,而且阶次是任意的.利用该充分必要条件,可以构造使闭环系统根轨迹包含分离点的被控对象传递函数.  相似文献   

2.
本文用一维直接搜索法在给定的区域内能准确地搜索出根轨迹点或补根轨迹点.它可 适用于零极点或分式多项式且均带有纯时间迟延的开环传递函数,原则上不受阶次的限制.本 法的程序在袖珍机PC-1500上已满意地做出了大量的实例,高至十阶.  相似文献   

3.
研究了基于多输入多输出离散时间系统的给定阶控制器l1优化设计问题.基于You la参数化法,对自由参数Q分为多项式和有理多项式两种情况进行了讨论,并将有理式的情形转化为多项式的形式,最后将给定阶的控制器优化问题归结为求解标准的线性规划问题.在给定控制器阶次的条件下,得到使闭环系统内部稳定并使相应的l1范数最小的最优控制器.最后给出了算例来验证算法的有效性.*  相似文献   

4.
研究了基于多输入多输出离散时间系统的给定阶控制器e1优化设计问题.基于Youla参数化法,对自由参数Q分为多项式和有理多项式两种情况进行了讨论,并将有理式的情形转化为多项式的形式,最后将给定阶的控制器优化问题归结为求解标准的线性规划问题.在给定控制器阶次的条件下,得到使闭环系统内部稳定并使相应的e1范数最小的最优控制器.最后给出了算例来验证算法的有效性.  相似文献   

5.
LQ最优控制之逆问题的研究   总被引:5,自引:2,他引:3  
本文通过适当地选取LQ性能指标函数中的加权矩阵R,给出了该二次型性能指标函数中的另一个加权矩阵Q与系统的开环特征多项式、闭环特征多项式的系数以及系数的系数矩阵A、B之间的对应关系。如果给定一个系统以及该系统的一组最优闭环极点,就可以求得矩阵Q。同时,用本文的研究结果,还可以直接确定系统的最优状态反馈系数矩阵。  相似文献   

6.
一种线性分数阶系统稳定性的频域判别准则   总被引:1,自引:0,他引:1  
高哲  廖晓钟 《自动化学报》2011,37(11):1387-1394
在分析了分数阶系统稳定性与传递函数分母相角增量的关系的基础上, 提出了一种线性分数阶系统的频域稳定性判别定理.定义了关于分数阶系统分母各项系数的两个函数,通过分析这两个函数正实数解的大小关系以及解的数目与分母最高阶数的关系,给出了分数阶系统稳定所需满足的条件.将用于在频域上对整数阶系统稳定性判别的Hermite-Biehler定理推广到对分数阶系统稳定性的判定.最后,通过对两个数值算例的分析,说明了提出的稳定性判别准则的正确性.  相似文献   

7.
构造了一种新的仅基于函数值的C1连续四次有理插值样条,其分子为四次多项式,分母是二次多项式.由于这种新的四次有理插值样条中含有3个参数和一个调节参数,因而在给定插值数据不变的前提下,能通过改变插值函数中参数与调节参数来更灵活地对插值曲线的局部进行修改,给约束控制带来了方便.对该种插值曲线的形状控制问题进行了研究,给出了将其约束于给定的折线、二次曲线之上、之下或之间的充分条件,改进和推广了一些相关结论.最后给出了数值例子.  相似文献   

8.
离散系统最优调节器的逆问题   总被引:3,自引:1,他引:2  
本文证明了在闭环特征多项式的系数,以及二次型指标函数中的矩阵Q和系统的系数矩阵A,B之间所存在的一组关系,并对系统(A,B)的形式无特别要求。对于SiSO系统来说,如果给定开环系统以及所希望的闭环特征,通过这组关系,就能方便地求出矩阵Q。  相似文献   

9.
前言我们知道用根轨迹法来研究系统是一种比较常用的方法。但是,当系统阶次高达三阶以上时,作根轨迹就会遇到一个难题:那就是找根轨迹的分离点或会合点。虽然现在可以用计算机来分析根轨迹,但是作为一般地分析系统还需要既简便又切实可行的办法。我们先讨论无延迟因子 e~(-rs)的情况,然后讨论有延迟因子 e~(-rs)的情况。  相似文献   

10.
本文描述了包含有多重实或复极点函数的拉普拉斯反变换的数字计算的一种算法,同时讨论了它的优点和缺点。 这种算法用了一种众所周知的简单数学方法来求一个多项式及其导数在它的一个根处的值。这种方法允许把函数的分子分母多项式分开处理,即是通过将每一多项式除以一个一阶项实现的。多项式与一阶项都含有复系数进行综合除法时更适合于用数字计算。对Pottle算法与本文所提出的算法的执行时间也作了比较。在本文的结尾有一个用于说明该算法的BASIC程序。  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.
《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   

18.
正The 34th Chinese Control Conference and SICE Annual Conference 2015(CCCSICE2015)is organized by the Technical Committee on Control Theory(TCCT)of Chinese Association of Automation(CAA)and the Society of Instrument and Control Engineers(SICE)of Japan,and locally organized by Hangzhou Dianzi University(HDU).  相似文献   

19.
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   

20.
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   

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