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Application of a genetic algorithm in triangulation of a 3-D object surface

International Journal of computers and Applications 2000年第2期22卷 73-77页

作者： Zhenyu, Chen Mbede, J.B. Yan, Zhou Dehua, Li Hanping, Hu State Commn. Res. Open Lab. Image P. Inst. Pattern Recog. Artif. Intell. Huazhong Univ. of Sci. and Technol. 430074 Wuhan China Intelligent Contr. and Robotics Lab. Dept. of Contr. Sci. and Engineering Huazhong Univ. of Sci. and Technol. 430074 Wuhan China Second Artillery Institute Huazhong Univ. of Sci. and Technol. Inst. Pattern Recog. Artif. Intell. Huazhong Univ. of Sci. and Technol. Second Artillery Institute China Wuhan University China Artificial Intelligence Department University of Edinburgh Inst. of AI and Pattern Recognition Huazhong Univ. of Sci. and Technol. China Cogn. Sci. Natl. Key Found. Res. P. Douala University Cameroon Tübingen University Germany Automatic Control Laboratory Darmstadt University Department of Service Cameroon Min. of National Education Robotics Laboratory Huazhong Univ. of Sci. and Technol. Wuhan China Assoc. Connectionnistes These-ACTH Rennes France IEEE Soc. of Robotics and Automation IEEE Society of Control Systems IASTED Assoc. Jeunes Chercheurs Robotique France Navy University of Engineering China Huazhong Univ. of Sci. and Technol. China Department of Computer Science Airforce Radar Acad. of Engineering China Inst. of P.R and AI Huazhong Univ. of Sci. and Technol.

This paper proposes a genetic-based algorithm for surface reconstruction of three-dimension (3-D) objects from a group of contours representing its section plane lines. The algorithm can optimize the triangulation of the surface of 3-D objects with a multi-objective optimization function to meet the needs of a wide range of applications. Further, a new crossover operator for triangulation and a new 3-D quadrilateral mutation operator are also introduced.

关键词： Object recognition

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Interactive on-line evaluation of robot motion control

Interactive on-line evaluation of robot motion control

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IEEE Conference on control Technology and Applications (CCTA)

作者： A. Valera A. Robertsson K. Nilsson R. Johansson Department of System Engineering & Automation Valencia Technical University Valencia Spain Department of Automatic Control Lund Institute of Technology Lund University Lund Sweden Lund Institute of Technology Department of Computer Science Lund University Lund Sweden

This paper presents a new real-time architecture for motion control of industrial robots. The new control system obtained has two main advantages: first it provides a total open control architecture and the second advantage is the simplicity and the interactivity of the platform developed. Experimental evaluation of a passivity-based control scheme shows the benefits of the architecture which is unique in the sense that open and advanced control can be combined with built-in safety logic as required in industrial applications.

关键词： Robot motion Motion control Robot control Industrial control control systems Electrical equipment industry Service robots Robot sensing systems Safety Logic

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Technical note Hybrid fuzzy P+ID control of manipulators under uncertainty

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Mechatronics 1999年第3期9卷 301-315页

作者： W. Li X.G. Chang F.M. Wahl S.K. Tso Department of Computer Science and Technology Tsinghua University Beijing 100084 Peoples Republic of China Institute for Robotics and Process Control Technical University of Braunschweig Hamburger Str. 267 D-38114 Braunschweig Germany Center for Intelligent Design Manufacturing and Automation Department of Manufacturing Engineering and Engineering Management City University of Hong Kong Hong KongPeoples Republic ofChina

Currently, most commercial robot manipulators are equipped with conventional PID controllers due to their simplicity in structure and ease of design. Using such a controller, however, it is difficult to achieve a desired control performance since the dynamic equations of a mechanical manipulator are tightly coupled. In addition, they are highly nonlinear and uncertain. This paper uses a new hybrid control scheme to control a direct drive two-link manipulator under inertial parameters changes. The proposed hybrid control scheme consists of a fuzzy logic proportional controller and a conventional integral and derivative controller (FUZZY P+ID). In comparison with a conventional PID controller, only one additional parameter has to be adjusted to tune the FUZZY P+ID controller. The outlined experimental results demonstrate the effectiveness and the robustness of the new FUZZY P+ID controller.

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Specialized neural network and fuzzy logic algorithm in comparison for word frequency prediction in document filtering

Specialized neural network and fuzzy logic algorithm in comp...

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1998 IEEE International Conference on Fuzzy Systems, FUZZY 1998

作者： Baranyi, Péter Aradi, Petra Kóczy, László T. Gedeon, Tamás D. Dept. of Automation T. U. of Budapest Hungary Department of Systems and Control Engineering T.U. of Budapest Hungary Dept. of Telecommunication and Telematics T. U. of Budapest Hungary School of Computer Science and Eng. U. of New South Wales Australia

ISBN: (纸本)078034863X

For very large document collections or high volume streams of documents, finding relevant documents is a major information filtering problem. A major aid to information retrieval systems produces a word frequency measure estimated from some important parts of the document using neural network approaches. In this paper a fuzzy logic technique and as its simplified case a neural network algorithm will be proposed for this task. The comparison of these two and an alternative neural network algorithm will also be discussed. © 1998 IEEE.

关键词： Information retrieval systems

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Specialized neural network and fuzzy logic algorithm in comparison for word frequency prediction in document filtering

Specialized neural network and fuzzy logic algorithm in comp...

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IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)

作者： P. Baranyi P. Aradi L.T. Koczy T.D. Gedeon Department of Automation TU Budapest Hungary Department of Systems and Control Engineering TU Budapest Hungary Department of Telecommunication and Telematics TU Budapest Hungary School of Computer Science and Engineering University of New South Wales Australia

关键词： Intelligent networks Neural networks Fuzzy logic Frequency estimation Frequency measurement Information retrieval Information filtering Information filters Machine assisted indexing Filtering algorithms

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Fault detection filter for linear time varying systems: An algebraic-geometric approach 4

Fault detection filter for linear time varying systems: An a...

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4th European control Conference, ECC 1997

作者： Szigeti, F. Bokor, J. Edelmayer, A. Tarantino, R. Department of Control Engineering Faculty Universidad de los Andes Mérida5101 Venezuela Systems and Control Laboratory Computer and Automation Institute Hungarian Academy of Science XI Kende u. 13-17 BudapestH1111 Hungary Maraven Oil Refinery Punta Cardon Venezuela Universidad de Los Andes Mérida5101 Venezuela

ISBN: (纸本)9783952426906

In this paper we consider the fault isolation problem for the linear time varying systems. Our approach is based on characterization of the observability of LTV systems by Kalman's rank condition, which permits us to design fault detection filters, feeding also the derivatives of the inputs and the outputs. We prove, using a computable method, that the isolation problem can be solved by generalized Luenberger's observer if and only if the detectability and the weak separability of fault signatures holds.

关键词： Observability

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Developing a prototype concurrent design tool for composite topside structures

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NAVAL ENGINEERS JOURNAL 1997年第3期109卷 279-290页

作者： Dirlik, S Hambric, S Azarm, S Marquardt, M Hellman, A Bartlett, S Castelli, V Steve Dirlik:began his career at the Naval Surface Warfare Center Carderock Division in 1981 as an aerospace engineer co-op student. He completed his bachelor of science degree in aeropace and ocean engineering from Virginia Polytechnic Institute and State University in 1985 and his master of science degree in aerospace engineering from the University of Maryland in 1990. Mr. Dirlik recently completed a master of science program in applied physics at The Johns Hopins University and currently works in the Radar Cross Section and Target Physics Branch of the Signatures Directorate at the Naval Surface Warfare Center Corderoke Division. He has worked on Navy low observable programs since 1990. Stephen Hambric:is a research associate at the Applied Research Laboratory at The Pennsylvania State University. He received his B. S. and M.S. degree in mechanical engineering from Virginia Polytechnic Institute and State University and his D. Sc. in mechnical engineering from the George Washington University. He has worked on several computer aided multidiscikplinary design and optimization projects over the years including an automated propeller design system and a structural acoustic optimization capability. Dr. Shpour Azarm:is currently working as an associate professor with the Design and Manufacturing Group of the Department of Mechanical Engineering at the University of maryland at College Park. Dr Azarm's expertise is in the areas of optimization-based designed and concurrent design and optimization of multidisciplinary systems. He was a consultant at Black & Decker Corporation (summer 1996) and worked as a Navy senior summer faculty fellow (summer 1995) and a NASA summer faculty fellow (summer 1994). He was a visiting scientist at NASA Langley Research Center for Multidisciplinary Analysis and Applied Structural Optimzatiom at the University of Siegen in Germany (spring 1992) and the Design Institute of the Technical University of Denmark (summer 1990). Dr Azarm was an associate technical editor of the ASME Jour

A prototype concurrent engineering tool has been developed for the preliminary design of composite topside structures for modern navy warships. This tool, named GELS for the Concurrent Engineering of Layered Structures, provides designers with an immediate assessment of the impacts of their decisions on several disciplines which are important to the performance of a modern naval topside structure, including electromagnetic interference effects (EMI), radar cross section (RCS), structural integrity, cost, and weight. Preliminary analysis modules in each of these disciplines are integrated to operate from a common set of design variables and a common materials database. Performance in each discipline and an overall fitness function for the concept are then evaluated. A graphical user interface (GUI) is used to define requirements and to display the results from the technical analysis modules. Optimization techniques, including feasible sequential quadratic programming (FSQP) and exhaustive search are used to modify the design variables to satisfy all requirements simultaneously. The development of this tool, the technical modules, and their integration are discussed noting the decisions and compromises required to develop and integrate the modules into a prototype conceptual design tool.

关键词： Warships

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Reliability evaluation of highly reliable computer control systems for energy generation, transmission and distribution

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EUROPEAN TRANSACTIONS ON ELECTRICAL POWER 1996年第2期6卷 111-118页

作者： Kochs, HD Dieterle, W Dittmar, E Prof. Dr.-Ing. Hans-Dieter Kochs (1943) VDE is head of the Department of Computer Science and Information Processing Systems at the Gerhard Mercator-University of Duisburgl Germany. He received the Dip1.-Ing. degree in Electrical Engineering and the Dr.-Ing. degree from the RWTH Aached Germany in 1972 and 1976 respectively. From 1979 to 1991 he was system engineer and division leader in the areas of R & D of highly-reliable large-scale control and information systems (AEGIDaimler FAG-Kugelfischer). Since 199 1 he has been Professor at the University of Duisburg. His current R & D areas are reliability safety and fault tolerance of technical systems especially automation systems and hybridknowledge based systems including fuzzy-logic and neural networks. (Gerhard-Menxitor-University-GH Duisburg FB 71FG 10 Lotharstr. 1 D-47048 Duisburg T +49203/379-2204 Fax +49203I379-2205) Dipl.-Ing. Werner Dieterle (1966). VDE received his degree in Electrical Engineering (Dip1.-Ing.) from the Technical University of Karlsruhd Germany in 1991. After having finished his studies he joined the scientific staff of the department of Computer Science and Information Processing Systems at the Gerhard-Mercator-University of Duisburgg Germany. His research interests include design of highly-reliable distributed computer control systems with particular focus on system communication. (Gerhard-Mercator-University -GH Duisburg FB 7/FG 10 Lothantr. 1 D-47048 Duisburg T +49203/3793483 Fax +49203/379-2205) Ing. (grad.) Ewald Dittmar (1943) received his degree in Electrical Engineering from the school of engineering in Mannheim/Germany. Since then he worked for different industrial companies and utilities. Since 1988 he has been with ABB/Germany where he cumntly is head of the strategy department of ABB Network Control and Rotection. He investigates new development strategies for modern control systems hardware and software architecture in the area of energy transmission and distribution. (ABB Netzleittechnik GmbH. Wallstadter S

The paper presents the results of an application-based reliability study of distributed computer control systems with very high reliability demand, e.g. for supervision and control of power plants and energy distribution systems. A reliability classification scheme is presented and typical redundant control system structures are evaluated and classified due to their system reliability Special focus is placed on assessing the influence of the communication system on total system reliability.

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Steady‐state security evaluation of electrical power systems by means of artificial neural network

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European Transactions on Electrical Power 1995年第2期5卷 91-97页

作者： Chiodo, E. Menniti, D. Testa, A. Picardi, C. Elio Chiodo (1959) received the degree in Electronics Engineering in 1985 and the Ph.D. degree in Computational Statistics both from the University of Naplefltaly. He is a Researcher at the Department of Electrical Engineering of the University of Naples and a member of the Italian Statistical Society. His areas of interest include probabilistic methods applied to electric power systems analysis. (University of Naples Fedrrico 11. Electrical Engineering Dept.via Claudio 21 1-80125 Naplefltaly T +3981/7683226 Fax+3981/2396897) Daniele Menniti (1958) received the degree in Electrical Engineering from the University of Calabria. Cosenzataly and the Ph.D. degree in Electrical Engineering from the University of NapleslItaly in 1984 and 1989 respectively. He is a researcher at the Electronic. Computer and Systems Science Department of the University of Calabria. Italy. Hiscurrent research interests concern electric power system analysis real-time control and automation. (University of Calabria Electronic Computer and Systems Science Dep. Arcavacataji Rende (CS). 1-87036 CosenzdItaly T +39984/494707. Fax +39984/4947 13) Alfredo Testa (1950) received the degree in Electrical Engineering from the University of Naples/Italy in 1975. He is an Associate Professor in Electrical Power Systems at the Department of Electrical Engineering of the University of Naples. He is engaged in researches on electrical power systems reliability and harmonic analysis. (University of Naples Federico 11. Electrical Engineering Dep. via Claudio '2 1 1-80 I25 NapleslItaly T + 39 8 I/7 68 3'2 11. Fax+3981/2396897) Ciro Picardi (1949) received the degree in Electronics Engineering from the University of Naples/Italy in 1975. He is currently Associate Professor in Process Control at the Department of Electronic Computer and System Science of the University of Calabria. Italy. His current research interests are in the area of electrical drives robotics neural networks and fuzzy control. (University of Calabria Electronic. Compu

An artificial‐neural‐network (ANN) application for steady‐state security evaluation of electrical power systems is presented. Such application is based upon a combined use of a multilayer back‐propagation neural network and of an opportune electrical system model, previously proposed by some of the authors. In the paper, the definition of steady‐state security and the problems arising from its on‐line evaluation are briefly recalled. Then, the ANN utilized is described with particular reference to the solutions adopted by the authors. Afterwards, some remarks on the system model utilized are reported. Finally, numerical applications on the AEP‐14 bus system are presented and the results obtained with different ANN configurations are analyzed. Copyright © 1995 John Wiley & Sons, Ltd.

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A method for evaluating software engineering environments

A method for evaluating software engineering environments

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IEEE Annual International computer Software and Applications Conference (COMPSAC)

作者： M.A. Taylor J.E. Urban Industrial Automation and Control Honeywell Inc. Phoenix AZ USA Department of Computer Science and Engineering Arizona State University Tempe AZ USA

A major obstacle blocking the widespread deployment of software engineering environments is the absence of generally accepted quantitative methods to measure the benefits or value, of their use. Such an evaluation technique can be used to identify settings where environments may have the greatest benefit, suggest directions for research efforts, and allow potential users to make informed choices among various candidates. The evaluation method presented here is inexpensive and easy to apply. The method is independent of any specific software engineering environment, process model, or methodology. The evaluation questionnaire enforces a distinction between perceptions of the development setting and perceptions of the utility of the software engineering environment. The method is composed of evaluation criteria and evaluation scales from the body of work in software measurement. automation of the evaluation method is straight forward.< >

关键词： Software engineering automation Standardization Software measurement Capability maturity model computer industry Industrial control Automatic control Software metrics Measurement standards

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