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Proceedings of the 46th IEEE Conference on Decision and control, Pages 4593-5051

作者： Manuela L. Bujorianu John Lygeros Faculty of Computer Science University of Twente Netherlands Automatic Control Laboratory ETH Zurich Switzerland

ISBN: (纸本)9781424414970;1424414970

In this paper, we give new characterizations of the stochastic reachability problem for stochastic hybrid systems in the language of different theories that can be employed in studying stochastic processes (Markov processes, potential theory, optimal control). These characterizations are further used to obtain the probabilities involved in the context of stochastic reachability as viscosity solutions of some variational inequalities.

关键词： stochastic reachability stochastic hybrid systems Markov processes reduite optimal stopping problem

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DFT algorithm analysis in low-cost power quality measurement systems based on a DSP processor

DFT algorithm analysis in low-cost power quality measurement...

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International Conference on Electrical Power Quality and Utilisation (EPQU)

作者： Miroslaw Szmajda Krzysztof Gorecki Janusz Mroczka Faculty of Electrical Engineering Automatic Control and Computer Science Opole University of Technology Opole Poland Faculty of Electronics Chair of Electronics and Photonics Metrology Technical University of Wrocław Wroclaw Poland

The application of power quality parameters measurement algorithms requires utilization of computational methods which transform the signal from the time- to the frequency-domain. Currently, the most frequently applied method is the fast Fourier transformation (FFT). Because of the amendment of the proper power quality standards, it is also necessary to consider of implementation discrete Fourier transformation (DFT) algorithms. Considering the number of computations, DFT is more complicated than FFT. This paper presents basic analog-to-digital conversion parameters, which are defined in the norms, the time duration analysis of DFT algorithms, considering described assumptions and comparing them to FFT. Codes created in C and assembler languages, as well as the Matlab/Simulink environment, were taken into account. The software including the aforementioned codes was implemented in a low-cost power quality measurement system based on the TMS320c6713 floating point DSP processor from Texas Instruments. In the software, a real time DSP/BIOS operation system was used. Multi thread programming in power quality measurement systems was presented, and an analysis of computational efficiencies of the systems based on the TMS320c6 713 DSP processors was performed.

关键词： Algorithm design and analysis Power quality Power measurement Digital signal processing Discrete Fourier transforms Frequency measurement Discrete transforms Frequency domain analysis Analog-digital conversion Assembly

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COMPARATIVE ANALYSIS OF PD CLASSICAL control AND PD FUZZY control IN TWO LIQUID LEVEL TANKS

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IFAC Proceedings Volumes 2007年第18期40卷 487-491页

作者： AZZOUZI MESSAOUDA FADI HALAL University “Politehnica” of Bucharest Faculty of Automatic control and Computer science 060032 Bucharest Romania Phone(40)726666281 E-Mail: enailia@yahoo.fr

This paper deals with comparative study of two structures of two liquid level control, that are PD fuzzy control and PD control. The classical control theory which relies on the mathematical model of the underlining system has been successfully applied to the control of a large variety of simple plant, therefore the PD fuzzy control that has two input variables and one output variable based on Mamdani inference system using 49 full rules base was introduced to compare it with the conventional one. The main idea from using PD fuzzy control is to build a model of an expert operator who is capable of controlling the plant without thinking in terms of mathematical model. A comparison well detailed in the application of these two control strategies on liquid level problem is presented [4].

关键词： Fuzzy control two liquid tanks PD fuzzy Conventional control Liquid level

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NEXT GENERATION OF INTELLIGENT MANUFACTURING SYSTEMS: A SURVEY

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IFAC Proceedings Volumes 2007年第18期40卷 181-186页

作者： Ioan Dumitrache Aurelian Mihai Stanescu Simona-Iuliana Caramihai University POLITEHNICA Bucharest Automatic Control and Computer Science Faculty dumi@cpru.pub.ro ams@cpru.pub.ro sic@cpru.pub.ro

The American Institute of Industrial Engineering formulated in 1955 the following paradigm for Manufacturing Systems: conceptual and detailed design, as well as socio- technologic- economic systems including heterogeneous resources (human, financial, technologies, capital, energy resources). During the last five decades many paradigm shifts have been identified. The paper is focused on the current achievements sustaining the time of convergence for different recent paradigm shifts. The authors do believe that Intelligent Autonomous Manufacturing Systems should be an appropriate purpose within global digital eve.

关键词： predictive design for manufacturing complex adaptive systems

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Towards interoperability -based collaborative research to support “environment & health”

Towards interoperability -based collaborative research to su...

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IEEE International Technology Management Conference (ITMC)

作者： Aurelian Mihai Stănescu Ioan Dumitrache Simona Iuliana Caramihai Mihnea Alexandru Moisescu Corina Ieremiciuc Otilia Ceangă Faculty of Automatic Control and Computer Science University “POLITEHNICA” of Bucharest Bucharest Romania Universitatea din Bucuresti Bucuresti RO University of Oil and Gas Ploiesti Ploiesti Romania

The rapid changes, that are induced continuously by the ICT, are going to transform gradually the Information Society into the Knowledge Based Society. It is the time of paradigms convergence like Concurrent Enterprising Collaborative Network Organizations, Extended Enterprise, Life Long Learning & Learning Organization, Enterprise Interoperability & Networking, etc. The Concurrent Engineering has been launched in the 80s as a new systematic methodology to design the New Product & Support Services & Systems, concurrently. But the CE is not yet a science. Can we, the Professional Virtual Community (PVC) transform it into a Collaborative multi domain science? The paper is aiming to provide the answer to one of the many questions facing the scientific community based on the results of a Romanian National Research pilot project, called “REMEDIUM”. The project is focused on developing a Complex Adaptive Metasystem (System of Systems) to investigate the pollutants effect on health.

关键词： Organizations Lead Automation computer aided software engineering Adaptation models

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

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

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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

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ML DESIGNERTM as simulation tool in robotics

ML DESIGNERTM as simulation tool in robotics

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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

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MARKOV DECISION PROCESSES WITH UNCERTAIN TRANSITION RATES: SENSITIVITY AND MAX HYPHEN MIN control

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Asian Journal of control 2008年第2期6卷

作者： Suresh Kalyanasundaram Edwin K. P. Chong Ness B. Shroff Motorola India Electronics Limited No. 66/1 Plot 5 Bagmane Techpark C. V. Raman Nagar Post Bangalore 560 093 India. Department of Electrical and Computer Engineering Colorado State University Fort Collins CO 80523-1373 USA. Professor Edwin K. P. Chong received the B.E.(Hons.) degree with First Class Honors from the University of Adelaide South Australia in 1987 graduating top of his class and the M.A. and Ph.D. degrees in 1989 and 1991 respectively both from Princeton University where he held an IBM Fellowship. He joined the School of Electrical and Computer Engineering at Purdue University in 1991 where he was named a University Faculty Scholar in 1999 and promoted to Full Professor in 2001. Since August 2001 he has been a Professor of Electrical and Computer Engineering and Professor of Mathematics at Colorado State University. His current interests are in communication networks and optimization methods. He coauthored the best-selling book An Introduction to Optimization 2nd Edition Wiley-Interscience 2001. He received the NSF CAREER Award in 1995 and the ASEE Frederick Emmons Terman Award in 1998. He coauthored a paper that was awarded Best Paper in the journal Computer Networks 2003. Professor Chong is a Fellow of the IEEE. He was founding chairman of the IEEE Control Systems Society Technical Committee on Discrete Event Systems and until recently served as an IEEE Control Systems Society Distinguished Lecturer. He has been on the editorial board of the IEEE Transactions on Automatic Control. He is currently on the editorial board of the journal Computer Networks. He has also served on the organizing committees of several international conferences. He has been on the program committees for the IEEE Conference on Decision and Control the American Control Conference the IEEE International Symposium on Intelligent Control IEEE Symposium on Computers and Communications and the IEEE Global Telecommunications Conference. He has also served in the executive committees for the IEEE Co

Solution techniques for Markov decision problems rely on exact knowledge of the transition rates, which may be difficult or impossible to obtain. In this paper, we consider Markov decision problems with uncertain transition rates represented as compact sets. We first consider the problem of sensitivity analysis where the aim is to quantify the range of uncertainty of the average per-unit-time reward given the range of uncertainty of the transition rates. We then develop solution techniques for the problem of obtaining the max-min optimal policy, which maximizes the worst-case average per-unit-time reward. In each of these problems, we distinguish between systems that can have their transition rates chosen independently and those where the transition rates depend on each other. Our solution techniques are applicable to Markov decision processes with fixed but unknown transition rates and to those with time-varying transition rates.

关键词： Markov decision processes sensitivity max-min control call admission control policy iteration

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Observer-based control of differential linear repetitive processes 9

Observer-based control of differential linear repetitive pro...

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2007 9th European control Conference, ECC 2007

作者： Paszke, Wojciech Galkowski, Krzysztof Rogers, Eric Kummert, Anton Institute of Control and Computation Engineering University of Zielona Góra ul. Podgórna 50 Góra65-246 Poland Department of Electronics and Computer Science University of Southampton SouthamptonSO17 1BJ United Kingdom Faculty of Electrical Information and Media Engineering University of Wuppertal Rainer-Gruenter-Strasse 21 D-42119 Germany

ISBN: (纸本)9783952417386

Repetitive processes are a distinct class of two-dimensional systems (i.e. information propagation in two independent directions) of both systems theoretic and applications interest. They cannot be controlled by direct extension of existing techniques from either standard (termed 1D here) or two-dimensional (2D) systems theory. Here we give significant new results on the design of mixed state feedback/output (or pass profile) control schemes incorporating a state observer. These results are for the sub-class of so-called differential linear repetitive processes which arise in applications areas such as iterative learning control. © 2007 EUCA.

关键词： State feedback

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Multi-agent based virtual learning environment. A socio-cultural approach

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WSEAS Transactions on Information science and Applications 2007年第1期4卷 30-35页

作者： Moisil, Ioana Pah, Iulian Barbat, Boldur Popa, Emil Marin Faculty of Engineering Computer Science and Automatic Control Dept. Lucian Blaga University of Sibiu Blvd. Victoriei No. 10 Sibiu Romania Faculty of Sciences - Economic Informatics Lucian Blaga University of Sibiu Blvd. Victoriei No. 10 Sibiu Romania Faculty of Sociology and Social Work Babes-Bolyai University of Cluj Napoca Cluj Napoca Romania

In our paper we are proposing a complex model of the student (learner) in a virtual educational environment, supported by a multi-agent system. The whole system is centered on the student and it mainly takes into account Vygotsky's socio-cultural theory that states that social interaction plays a fundamental role in the development of cognition. The model is part of a larger project - DANTE - Socio-Cultural Models implemented through multi-agent architecture for e-learning - that has as main objective the development of a student centred framework for the virtual educational universe that facilitates collaborative learning. The virtual educational world is inhabited by agents: human agents and artificial agents that interact. Agents can be mediating agents, semiotic agents or social agents;they can be intelligent software entities or simple ones, like interface agents.

关键词： Multi agent systems

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