检索结果-内蒙古大学图书馆

作者： Korobtsov, V.V. Balashev, V.V. Pisarenko, T.A. Chusovitin, E.A. Markidonov, E.V. Institute of Automation and Control Processes FEBRAS Radio Street 5 690041 Vladivostok Russia Faculty of Physics and Engineering Far Easten State University Sukhanova Street 8 690950 Vladivostok Russia

Kinetics of structure and phase constitution of Fe/SiO2/Si(001) system under different conditions of deposition and annealing was considered. It was established that SiO2 layer is not destroyed during Fe deposition process over the temperature range from 20 to 650° C. As a result, the Fe films having different morphologies are formed on the oxide surface. Destruction of SiO2 layer occurs upon annealing on defect places of SiO2 film that results in the interaction of Fe atoms with the Si substrate and successive suicides formation. © 2007 The Surface Science Society of Japan.

关键词： Iron

来源：评论

学校读者我要写书评

暂无评论

Decoupled control of two tank system via algebraic μ-synthesis

Decoupled control of two tank system via algebraic μ-synthe...

引用

Mediterranean Conference on control and automation (MED)

作者： M. Dlapa Department of Automation and Control Engineering Faculty of Applied Informatics Tomas Bata University Zlin Zlin Czech Republic

The paper deals with design of a robust controller via algebraic mu-synthesis for two tank system, which is a well known benchmark problem. The controller is designed by decoupling two-input two-output system into two identical SISO (Single-Input Single-Output) plants. The task of designing the robust controller is then performed by finding a suitable pole placement for the SISO systems with the robustness assessed by structured singular value denoted mu for generalized plant. The final controller is compared with D-K iteration as a standard tool for mu-synthesis through simulation for nominal plant and plant perturbed by the worst case perturbation.

关键词： control systems Robust control MIMO Automatic control State feedback Valves Temperature Transfer functions Design automation control engineering

来源：评论

学校读者我要写书评

暂无评论

Design and Practical Application of Simple Robust controllers: A Parametric Approach

Design and Practical Application of Simple Robust Controller...

引用

IEEE Conference on control Technology and Applications (CCTA)

作者： Radek Matusu Roman Prokop Department of Automation and Control Engineering Faculty of Applied Informatics Tomas Bata University in Zlín Zlin Czech Republic

The contribution is focused on brief description of proposed control design process and primarily on practical application of obtained simple robust control algorithms. The synthesis is based on general solutions of Diophantine equations in the ring of proper and stable rational functions, Youla-Kucera parameterization and divisibility conditions and one of its main advantages can be seen in existence of single scalar tuning parameter. The real-time control behaviour has been tested on laboratory model of hot-air tunnel which has been mathematically described by various transfer functions containing parametric type of uncertainty.

关键词： Robust control control systems Uncertainty Tuning Transfer functions Optimal control control design control system synthesis Equations Testing

来源：评论

学校读者我要写书评

暂无评论

ML DESIGNERTM as simulation tool in robotics

ML DESIGNERTM as simulation tool in robotics

引用

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

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：