检索结果-内蒙古大学图书馆

International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Service (TELSIKS)

作者： Mario Schulz Ivan Velickovic Sasa Andelkovic Volker Zerbe Goran S. Dordevic Computer Science and Automation Faculty System and Control Theory Department Technical University Ilmenau Ilmenau Germany Faculty of Electronics engineering Robotics Lab University of Nis Nis Serbia

Robots are complex systems that require multidisciplinary approach to development. Hence, both research and production of a robotic system require a tool that would provide means for coordination between teams with different areas of expertise as well as the ability to integrate, simulate and debug the system in a comprehensive way. Also, with the growing popularity of service robotics, research and modeling of human-machine interaction gains the attention. From a simulation tool, it is expected to support the means for describing this interaction. For that purpose we are investigating the ML Designer TM , not just as a possible simulation tool, but also as a modeling and design paradigm. For verification purposes we will compare it against MATLAB Simulink TM . A pneumatic system will be modeled with both tools and a comparison will be performed.

关键词： Mathematical model Robot kinematics Cleaning System testing Power system modeling MATLAB Pneumatic systems control systems Level control Costs

来源：评论

学校读者我要写书评

暂无评论

An Initial Rotor Position Estimation Method for Switched Reluctance Motor without Using Machine Parameter

An Initial Rotor Position Estimation Method for Switched Rel...

引用

International Conference on Electrical Machines and Systems 2007(ICEMS2007)(第十届国际电机与系统会议)

作者： K. Tungpimolrut S. Kachapornkul P.Somsiri P. Jitkreeyarn Tadashi Fukao Akira Chiba Industrial Control and Automation Laboratory Section National Electronics and Computer Technology C Department of Electrical Engineering Faculty of Science and Technology Tokyo University of Science

In this paper a method to estimate the initial rotor position of the switched reluctance motor (SRM) at the stand still condition is proposed. The proposed method can be implemented by the simple microcontroller based system, and it is not necessary to know the magnetization curves. The impulse gate drive signal is applied and the winding current is detected and its approximate value is used for calculating the rotor position. The compensation method to reduce the estimation error thorough one cycle is also mentioned. The proposed method is implemented with the 6-stator-pole and 4- rotor-pole, 1.5 kW 3-phase switched reluctance motor.

关键词： Switched reluctance motor initial rotor position estimation

来源：评论

学校读者我要写书评

暂无评论

Electric Power Quality in Isolated Systems - Requirements and Examples of Analysis

Electric Power Quality in Isolated Systems - Requirements an...

引用

Compatibility in Power Electronics (CPE)

作者： Daniel Czarkowski Janusz Mindykowski Marek Olesz Edward Szmit Mariusz Szweda Cork Institute of Technology Ireland Department of Marine Electrical Power Engineering Gdynia Maritime Academy Poland Faculty of Electrical and Control Engineering Gdansk University of Technology Poland Electrical and Automation Department PRS

The paper analyses power quality requirements for isolated systems. Standards used within this framework are taken from widely used classification societies rules, international standards applied to shore and off-shore units. The norms can be also divided into merchant and navy ships, both are analyzed. The requirements themselves are just a simple indication tool of the electric power quality. Hence, four real time examples are presented: 1) a navy ship with regular propeller, 2) an all electric ship with power network exceeded 1 MVA, 3) a passenger ship with 6.6 kV network and 4) equipment installed on shore, i.e. 120 kVA uninterruptible power supply system. For some of the presented examples standards are not fulfilled, which is discussed and some remarks are given.

关键词： Marine vehicles Electromagnetic compatibility Power quality Uninterruptible power systems Marine technology Power system measurements Voltage IEC standards Power system harmonics Frequency

来源：评论

学校读者我要写书评

暂无评论

NEURAL-ADAPTIVE control BASED ON ADALINE NEURONS WITH APPLICATION TO A POWER SYSTEM

引用

IFAC Proceedings Volumes 2007年第18期40卷 457-464页

作者： Ioan Filip Octavian Prostean Florin Dragan Cristian Vasar Department of Control System Engineering “Politehnica” University from Timisoara Faculty of Automation and Computer Science 300223 Timisoara Romania Phone: (+40) 0256-403238 E-Mail: ioan.filip@aut.upt.ro

A neural-adaptive control solution is exposed in this paper. The control strategy is based on the linear adaptive neuron, which is called ADALINE. Unlike other neural control solutions, based on perceptrons neurons characterized by a long time learning process and a difficult on-line tuning of weights, this approach uses a fast algorithm, which adapts on-line the neuron's weights. Therefore the non-linear character of control law is induced by the permanent changes of neuron weights, which are variable parameters of controller. A set of study cases is done, with application to the excitation control of a synchronous generator.

关键词： adaptive control neural networks ADALINE modelling simulation synchronous generator

来源：评论

学校读者我要写书评

暂无评论

SHORT TERM ELECTRIC LOAD FORECAST WITH ARTIFICIAL NEURAL NETWORKS

引用

IFAC Proceedings Volumes 2007年第18期40卷 443-449页

作者： Vasar Cristian Szeidert Iosif Filip Ioan Prostean Gabriela Department of Control System Engineering “Politehnica” University from Timisoara Faculty of Automation and Computer Science 300223 Timisoara Romania Phone: (+40) 256-403237 E-Mail: cristian.vasar@aut.upt.ro

This paper presents issues regarding short term electric load forecasting using feedforward and Elman recurrent neural networks. The study cases were developed using measured data representing electrical energy consume from Banat area. There were considered 35 different types of structure for both feedforward and recurrent network cases. For each type of neural network structure were performed many trainings and best solution was selected. The issue of forecasting the load on short term is essential in the effective energetic consume management in an open market environment.

关键词： neural networks prediction problems load forecasting feedforward networks simulation

来源：评论

学校读者我要写书评

暂无评论

Federated filtering for fault tolerant estimation and sensor redundancy management in coupled dynamics distributed systems

Federated filtering for fault tolerant estimation and sensor...

引用

Mediterranean Conference on control and automation (MED)

作者： A. Edelmayer M. Miranda Faculty of Engineering Department of Chemical Engineering Laboratory of Unit Operations University de Los Andes Merida Venezuela Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences Budapest Hungary

This paper discusses the application of the idea of federated filtering to the estimation of intrinsically nonlinear distributed systems by examining its impacts on filtering performance by using the Extended Kalman Filter (EKF) as state estimator. Specifically, the performance of the traditional centralized solution is compared with the filtering structure obtained using the federating idea, and their conceptions, and their ability to balance between fault tolerance and estimation accuracy is examined. Our research demonstrates how successfully the EKF for solving nonlinear estimation problems in federated structures can be used, noting that the idea of federation have only been demonstrated for linear problems previously. In addressing the demands of both fault tolerance and estimation accuracy, it is shown that increased filtering accuracy is relied on the proper choice of sharing of the error covariance information between local filters, while sensor fault tolerance is provided by the utilization of an appropriate resetting policy of the filter.

关键词： Fault tolerant systems Sensor systems Redundancy Nonlinear filters Fault tolerance control systems Information filtering Information filters Computer architecture Sensor arrays

来源：评论

学校读者我要写书评

暂无评论

4×1 to 7×3 transition in the In∕GexSi1−x(111) system induced by varying the substrate lattice constant

引用

Physical Review B 2007年第7期76卷 073307-073307页

作者： D. V. Gruznev D. A. Olyanich D. N. Chubenko A. V. Zotov A. A. Saranin Institute of Automation and Control Processes 690041 Vladivostok Russia Faculty of Physics and Engineering Far Eastern State University 690000 Vladivostok Russia Department of Electronics Vladivostok State University of Economics and Service 690600 Vladivostok Russia

Taking Si(111)4×1−In as a prototype reconstruction, we have examined the possibility of modifying an adsorbate-induced reconstruction by varying the averaged lattice constant of the substrate. In the experiment, the lattice constant of Si(111) substrate has been increased by forming a thin alloying GexSi1−x layer on Si(111). It has been found that this action results in removing the 4×1 reconstruction and developing a 7×3 reconstruction, the transformation being completed when more than 0.3 ML (monolayer) of Ge has been incorporated into the substrate. The 7×3 reconstruction has a striped-shaped structure built of double rows and plausibly contains 0.1 ML of In and 0.65±0.04 ML of Si(Ge) atoms and, like the 4×1, demonstrates metallic properties. The 7×3 reconstruction is not observed in “pure” In∕Si(111) and In∕Ge(111) systems. We believe that the artificial variation of substrate lattice constant not only provides a possibility of examining the role of surface stress in reconstructions but also opens a degree of freedom for engineering other types of reconstructions.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Pb-modified In∕Si(100)4×3 magic clusters: Scanning tunneling microscopy and first-principles total-energy calculations

引用

Physical Review B 2007年第11期76卷 115310-115310页

作者： A. V. Zotov O. A. Utas V. G. Kotlyar I. A. Kuyanov A. A. Saranin Institute of Automation and Control Processes 690041 Vladivostok Russia Faculty of Physics and Engineering Far Eastern State University 690000 Vladivostok Russia Department of Electronics Vladivostok State University of Economics and Service 690600 Vladivostok Russia

Using scanning tunneling microscopy and first-principles total-energy calculations, Pb-induced modification of the In∕Si(100)4×3 magic cluster arrays has been studied. Cluster modification has been found to occur upon Pb deposition onto Si(100)4×3−In surface held at 330–380°C and reside in substituting central Si atom in Si7In6 cluster of Bunk et al. [Appl. Surf. Sci. 123/123, 104 (1998)] for Pb atom. According to scanning tunneling spectroscopy data, Pb-modified cluster shows up as a semiconductor with a band gap somewhat larger than that of an ordinary cluster. Possibility to fabricate arrays almost completely (up to 95%) built of Pb-modified clusters has been demonstrated.

关键词：

来源：评论

学校读者我要写书评

暂无评论

SUPER-HEURISTICS AND THEIR APPLICATIONS TO COMBINATORIAL PROBLEMS

引用

Asian Journal of control 2008年第1期1卷

作者： Tak Wing Edward Lau Yu-Chi Ho Division of Engineering and Applied Sciences Harvard University Cambridge MA02138 U.S.A. Yu-Chi (Larry) Ho received his S.B. and S.M. degrees in Electrical Engineering from M.I.T. and his Ph.D. in Applied Mathematics from Harvard University. Except for three years of full time industrial work he has been on the Harvard Faculty. Since 1969 he has been Gordon McKay Professor of Engineering and Applied Mathematics. In 1988 he was appointed to the T. Jefferson Coolidge Chair in Applied Mathematics and Gordon McKay Yu-Chi (Larry) Ho received his S.B. and S.M. degrees in Electrical Engineering from M.I.T. and his Ph.D. in Applied Mathematics from Harvard University. Except for three years of full time industrial work he has been on the Harvard Faculty. Since 1969 he has been Gordon McKay Professor of Engineering and Applied Mathematics. In 1988 he was appointed to the T. Jefferson Coolidge Chair in Applied Mathematics and Gordon McKay Professor of Engineering at Harvard and as visiting professor to the Cockrell Family Regent's Chair in Engineering at the University of Texas Austin. He has published over 120 articles and three books one of which (co-authored with A.E. Bryson Jr.) has been translated into both Russian and Chinese and made the list of Citation Classics as one of the most referenced works on the subject of optimal control. He is on the editorial boards of several international journals and is the editor-in-chief of the new international Journal on Discrete Event Dynamic Systems. He is the recipient of various fellowships and awards including the Guggenheim (1970) and the IEEE Field Award for Control Engineering and Science (1989) the Chiang Technology Achievement Award (1993). He is a fellow of IEEE a Distinguished Member of the Control Systems Society and a member of the U.S. National Academy of Engineering. In addition to serving on various governmental and industrial panels and professional society administrative bodies he was the President of the IEEE Robotics & Automation Society in 1988

Combinatorial problems are known to be difficult because of the shear size of the solution space and the lack of polynomial time algorithms to “solve” them. Heuristics are often devised to produce acceptable solutions in an affordable time. In this paper, we propose a method called super-heuristic that expands the capabilities of heuristics using randomization and sampling techniques. We submit that heuristics are in general strategies that map from available information of a problem instance to decisions in solution constructions/improvement. We show that it is important to utilize the information effectively in the randomization process. More importantly, the possibility of randomization around a heuristic spells out the demarcation between the roles of human and machines in complex optimization problems.

关键词： Combinatorial problems heuristics randomization and sampling techniques man-machine interactions

来源：评论

学校读者我要写书评

暂无评论

Developing antiphase boundaries in one-monolayer Tl∕Ge(100) system by re-bonding of underlying Ge dimers

引用

Physical Review B 2007年第19期76卷 193302-193302页

作者： A. A. Saranin A. V. Zotov I. A. Kuyanov Yu. V. Luniakov M. Katayama K. Oura Institute of Automation and Control Processes 690041 Vladivostok Russia Faculty of Physics and Engineering Far Eastern State University 690000 Vladivostok Russia Department of Electronics Vladivostok State University of Economics and Service 690600 Vladivostok Russia Department of Electronic Engineering Faculty of Engineering Osaka University Suita Osaka 565-0871 Japan Research Center for Ultra-High Voltage Electron Microscopy Osaka University Ibaraki Osaka 567-0047 Japan

Using scanning tunneling microscopy, it has been found that a one-monolayer Tl∕Ge(100)2×1 surface demonstrates a fascinating possibility to form antiphase boundaries (APB’s) by re-bonding underlying Ge dimers. This is in contrast to adsorbate-free Si(100) and Ge(100) surfaces and one-monolayer Tl∕Si(100) system, where APB formation does not occur. Energetics of APB formation in various systems, including adsorbate-free Si(100) and Ge(100) surfaces and Tl∕Si(100) and Tl∕Ge(100) systems, have been evaluated using first-principles total-energy calculations, which reveal that Tl∕Ge(100) is the only system where APB formation is the energetically favorable process.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：