检索结果-内蒙古大学图书馆

IEEE International Symposium on Industrial Electronics (ISIE)

作者： D. Gracanin K. Matijasevic N.C. Tsourveloudis K.P. Valavanis Virtual Reality and Multimedia Laboratory University of Southwestern Louisiana Lafayette LA USA Faculty of Electrical Engineering and Computing University of Zagreb Zagreb Croatia Department of Production Engineering and Management Technical University of Crete Crete Greece Center for Advanced Computer Studies University of Southwestern Louisiana Lafayette LA USA

This paper presents a distributed, multi-user virtual reality testbed for a mobile robot. The main components of the testbed include user interface, networking, simulation and robot control. The user interface is implemented as a combination of a virtual environment and a standard graphical user interface (GUI). The virtual environment is developed using the Virtual Reality Modeling Language (VRML) and it corresponds to the laboratory environment where the robot is placed and tested. The standard GUI is implemented using Java Programming language. The World Wide Web (WWW) browser is used to integrate the virtual environment (embedded VRML) and the standard GUI (Java applet) in a single user interface. Users can access a dedicated WWW server and download the user interface. Networking component (communication among users and robots) is implemented using the Distributed Interactive Simulation (DIS) protocol. The existing robot development system has been utilized to provide simulation capabilities. A separate stand-alone Java application has been developed to communicate and control the robot using a wireless Ethernet link. In addition to user's direct control, control algorithms (e.g. fuzzy logic based) can be used to replace the user. A Nomad200 mobile robot has been used for initial measurements and evaluations of the testbed.

关键词： Virtual reality Testing Mobile robots User interfaces Graphical user interfaces Virtual environment Java Robot control World Wide Web Communication system control

来源：评论

学校读者我要写书评

暂无评论

CNN-based difference-controlled adaptive non-linear image filters

引用

International Journal of Circuit Theory and Applications 1999年第4期26卷

作者： Csaba Rekeczky Tamás Roska Akio Ushida Analogical and Neural Computing Laboratory Computer and Automation Institute Hungarian Academy of Sciences Budapest Hungary Department of Electrical and Electronic Engineering Faculty of Engineering University of Tokushima Tokushima Japan

In this paper, we develop a common cellular neural network framework for various adaptive non-linear filters based on robust statistic and geometry-driven diffusion paradigms. The base models of both approaches are defined as difference-controlled non-linear CNN templates, while the self-adjusting property is ensured by simple analogic (analog and logic) CNN algorithms. Two adaptive strategies are shown for the order statistic class. When applied to the images distorted by impulse noise both give more visually pleasing results with lower-frequency weighted mean square error than the median base model. Generalizing a variational approach we derive the constrained anisotropic diffusion, where the output of the geometry-driven diffusion model is forced to stay close to a pre-defined morphological constraint. We propose a coarse-grid CNN approach that is capable of calculating an acceptable noise-level estimate (proportional to the variance of the Gaussian noise) and controlling the fine-grid anisotropic diffusion models. A combined geometrical–statistical approach has also been developed for filtering both the impulse and additive Gaussian noise while preserving the image structure. We briefly discuss how these methods can be embedded into a more complex algorithm performing edge detection and image segmentation. The design strategies are analysed primarily from VLSI implementation point of view; therefore all non-linear cell interactions of the CNN architecture are reduced to two fundamental non-linearities, to a sigmoid type and a radial basis function. The proposed non-linear characteristics can be approximated with simple piecewise-linear functions of the voltage difference of neighbouring cells. The simplification makes it possible to convert all space-invariant non-linear templates of this study to a standard instruction set of the CNN Universal Machine, where each instruction is coded by at most a dozen analog numbers. Examples and simulation results are given t

关键词： non-linear cellular neural networks CNN Universal Machine adaptive non-linear filters robust statistic filters geometry-driven diffusion

来源：评论

学校读者我要写书评

暂无评论

Healthcare Informatics Society of Ireland

引用

Irish Journal of Medical Science 1999年第4期168卷 276-282页

作者： Rigby, M. Sheridan, A. Draper, R. Stephens, G. Gaffney, P. Grimson, J. Avalos, G. Comerford, F. R. Kanagaratnam, B. Dineen, B. Hamilton, I. Jung, B. Felton, E. Berry, D. Grimson, W. Rice, D. H. Healy, M. Bruce, A. Kelly, J. Carroll, T. Grogan, A. Hurl, G. A. Hyland, D. Roberts, J. Brazil, J. Callanan, I. Devitt, A. O’Brien, T. O’Sullivan, U. M. Peyton, K. Wilson, M. J. Collins, R. Crawley, L. Foley, D. Strachan, H. McBrearty, P. Murnane, R. Murphy, E. Keane, V. Mulvany, F. Sweeney, P. D. Kenny, D. O’Connell, P. R. Balfe, P. Minogue, G. Centre for Health Planning & Management Keele University Keele Staffordshire Britain St. John of God Hospital Stillorgan Hospitaller Order of St. John of God Stillorgan Dept. of Computer Science Trinity College Dublin Clinical Chemistry Laboratory Tallaght Hospital Tallaght Dublin 24 Department of Experimental Medicine Faculty of Medicine National University of Ireland Galway Department of Health Promotion Faculty of Medicine National University of Ireland Galway School of Control Systems & Electrical Engineering Dublin Institute of Technology Ireland Shared Medical Systems Malvern USA Healy Services Dublin Universal Learning Systems Ltd. Dublin The Rotunda Hospital Dublin Mater Misericordiae Hospital Dublin Institute for Healthcare Informatics Dublin First Consulting Group Macclesfield Britain Virus Reference Laboratory UCD Belfield Dublin 4 Cappagh Orthopaedic Hospital Dublin Ireland Southern Health Board Cork Mater Misericordiae Hospital Dublin 7 DSS Dublin Ltd. Ireland University College Dublin Ireland Mary Aikenhead School of Nursing St. Vincent’s Hospital Dublin Blackrock Clinic Dublin Borders Community Health Services NHS Trust Britain James Connolly Memorial Hospital Blanchardstown Dublin 15 Kildare and West Wicklow Mental Health Service for People with A Learning Disability Eastern Health Board Dublin Health Research Board Dublin General Practice Research Unit The Medical Centre Dungloe Dept. of Clinical Biochemistry Our Lady’s Hospital for Sick Children Crumlin Dublin 12

来源：评论

学校读者我要写书评

暂无评论

A sensitivity measure for variable reluctance step motor and calculating optimum parameter tolerances 6

A sensitivity measure for variable reluctance step motor and...

引用

6th International Conference on Optimization of electrical and Electronic Equipments, OPTIM 1998

作者： Erdal, Cevat Istanbul Technical University Faculty of Electrical-Electronics Engineering Department of Control and Computer Engineering Maslak Istanbul80626 Turkey

ISBN: (纸本)9739851126

The variable reldance step motor ( m-step motor) is one the most important control elements used in process control industry. In this study a method is proposed by the use of the sensitivities of the transfer ,function to determine the optimum parameter tolerances. These tolerances keep the deviation of the output ofthe VRstep motor due to parameter variations. in folerance region. Furthermore a sensitivity measure is dejned to be used to improve the sensitivity perfrirmance of a VR-step motor and to compare various b%-step motors with drfferent set of design parameter values which realize the same transfer function. © 1998 Institute of electrical and Electronics Engineers Inc. All rights reserved.

关键词： Transfer functions

来源：评论

学校读者我要写书评

暂无评论

Modelling and control of Water Supply Systems

引用

IFAC Proceedings Volumes 1998年第20期31卷 543-548页

作者： Nedjeljko Perić Ivan Petrović Ante Magzan University of Zagreb Croatia Faculty of Electrical Engineering and Computing Department of Control and Computer Engineering in Automation Končar-Electrical Engineering Institute Zagreb Croatia

A dynamical mathematical model of a water supply plant based on lumped parameters is described. A concept of its control system is proposed that ensures output pressure stabilisation under conditions of variable water consumption and variable water recourses. The control system consists of inner control loops which control the flow of each pump station and of a superimposed control loop that controls the output pressure of the water supply plant. The pressure controller calculates the cumulative reference value of the water flow for all controlled pumps and from this value an algorithm for the flow distribution calculates the reference flow for each inner loop, taking into account the level of water accumulation in each water well. control performances of output pressure obtained by a conventional PI controller and a fuzzy logic based controller are compared.

关键词： Large-scale systems Pressure control Flow control Pipelines Plants Mathematical models Fuzzy control

来源：评论

学校读者我要写书评

暂无评论

Comparison of the self-tuning generalized predictive controller and pole placement controller

Comparison of the self-tuning generalized predictive control...

引用

Mediterranean Electrotechnical Conference (MELECON)

作者： I. Santro N. Peric I. Petrovic Faculty of Electrical Engineering and Computing Department of Control and Computer Engineering in Automation University of Zagreb Zagreb Croatia

The basic principles of the self-tuning generalized predictive controller (GPC) and the self-tuning pole placement controller are presented. A laboratory shell-and-tube heat exchanger is used to test the properties of the presented controllers. The self-tuning GPC were compared with the self-tuning pole placement controller regarding their parameter adjustment complexity, reference and disturbance step responses and robustness to differences between the real process and its mathematical model.

关键词： State feedback Automatic control Predictive models Optimal control Costing Cost function control engineering computing Laboratories Testing Robust control

来源：评论

学校读者我要写书评

暂无评论

Rudder servo-system fault diagnosis using neural network fault modeling

Rudder servo-system fault diagnosis using neural network fau...

引用

OCEANS

作者： Z. Vukic D. Pavlekovic H. Ozbolt Faculty of Electrical Engineering and Computing Department of Control and Computer Engineering in Automation University of Zagreb Zagreb Croatia

The model based fault detection and identification scheme for the rudder servo system as the actuator in the closed loop course keeping control system is presented. The nonlinear process model that enables description of a wide class of fault types is given and the fault function as the residual for detecting and identifying the fault is introduced. A fault detection scheme with variable thresholds is suggested and its performance has been tested via simulation in the presence of modeling uncertainty and noise. A fault identification scheme based on comparison between the fault function estimate and the output of a predefined analytical fault model is suggested.

关键词： Fault diagnosis Neural networks Fault detection control systems Automatic control Actuators control system synthesis Redundancy control engineering computing computer networks

来源：评论

学校读者我要写书评

暂无评论

Improved Fuzzy Autopilot for Track-Keeping

引用

IFAC Proceedings Volumes 1998年第30期31卷 123-128页

作者： Zoran Vukić Edin Omerdić Ljubomir Kuljaca University of Zagreb Faculty of Electrical Engineering and Computing Department of Control and Computer Engineering in Automation Unska 3 HR-10000 Zagreb Croatia University of Tuzla Faculty of Electrical and Mechanical Engineering Department of Control Engineering in Automation Franjevačka 2 BH-75000 Tuzla Bosnia and Herzegovina

Improved 2-input fuzzy autopilot for ship course control and 3-input fuzzy autopilot for track-keeping are proposed. Nonlinear model of a ship and a steering subsystem is used. The 3-input fuzzy autopilot uses heading signal, yaw rate signal and lateral offset from the nominal track to produce a command rudder angle. Input variable fuzzyfication, fuzzy associative memory rules and output set defuzzyfication are described. Obtaining of FAM rules for 3-input fuzzy is described. Dynamical behavior of 2 and 3-input fuzzy autopilot is compared. The influence of wave disturbance, sea current and external disturbance from a passing ship on track-keeping performance was analyzed.

关键词： Disturbance rejection Fuzzy control Nonlinear control systems Ship control

来源：评论

学校读者我要写书评

暂无评论

Adriatic Sea noise spectrum measurement and polynomial approximation

Adriatic Sea noise spectrum measurement and polynomial appro...

引用

OCEANS

作者： D. Matika H. Ozbolt Ministry of Defense of the Republic of Croatia Zagreb Croatia Faculty of Electrical Engineering and Computing Department of Control and Computer Engineering in Automation University of Zagreb Zagreb Croatia

Based on the research at the location "Middle Adriatic", the analysis of the noise spectrum of the Adriatic Sea is presented. The applied measurement method and necessary instrumentation, followed by the basic scheme of the measurement channel, are given. A representative Adriatic Sea noise spectrum for the particular location is given, with the sea state as a parameter. A regression analysis is made that led to an appropriate approximation polynomial of the spectrum.

关键词： Sea measurements Noise measurement Polynomials Frequency Low-frequency noise Wind speed control engineering computing Noise level Rain Ice

来源：评论

学校读者我要写书评

暂无评论

A Sensitivity Measure for Variable Reluctance Step Motor and Calculating Optimum Parameter Tolerances

A Sensitivity Measure for Variable Reluctance Step Motor and...

引用

International Conference on Optimization of electrical and Electronic Equipment, OPTIM

作者： C. Erdal Faculty of Electrical-Electronics Engineering Department of Control and Computer Engineering Istanbul Technical University Istanbul Turkey

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：