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EAEEIE Annual Conference,

作者： Sergei Kostin Raimund Ubar Jaan Raik Margit Aarna Marina Brik H.-D. Wuttke Department of Computer Engineering Tallinn University of Technology Tallinn Estonia Faculty of Computer Science and Automation Ilmenau Technical University Ilmenau Germany

In this work, we propose a multifunctional e-learning environment with remote access for learning, getting hands-on experience, and carrying out laboratory research in developing optimized procedures for locating faults in complex electronic systems. It is a combination of a collection of software tools which simulate a system under diagnosis, emulate a pool of different strategies, methods, and algorithms of diagnostic reasoning and fault location, and allow to experiment with different embedded self-diagnosing architectures. Hands-on experiments target research teaching issues. The interactive character of the environment makes experiments attractive and helps to raise the students' curiosity.

关键词： Education Digital systems Fault diagnosis Circuit faults System testing Electronic learning Software tools Software algorithms Circuit testing Built-in self-test

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The designing and simulation of passive filters used in urban transportation substations

The designing and simulation of passive filters used in urba...

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Eurocon

作者： Petre-Marian T. Nicolae Lucian N. Mandache Ileana-Diana V.D. Nicolae Department of Fundamental Electrical Engineering Faculty of Electrotechnics University of Craiova Romania Department of Software Engineering Faculty of Automation Computer Science and Electronics University of Craiova Romania

The paper presents the features of passive filters and some of the topologies used for the improving of power quality. One has in view aspects on the designing of passive filters tuned for some harmonic components. One presents some recordings and numerical simulations made over the electric signals from a substation used for the supplying of a d.c. line of 600 V. Based on the obtained results one proposes solutions for passive compensations with the consideration of a number of filtering components that depends on the compensation necessities. In order to verify the compensation efficiency, through SPICE simulation, one estimates the effects of compensation correlated with the number of passive filtering cells.

关键词： Passive filters Transportation Substations Power harmonic filters Filtering Frequency Resonance Impedance Band pass filters SPICE

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Signal and system representations on hyperbolic groups: Beyond rational orthogonal bases

Signal and system representations on hyperbolic groups: Beyo...

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IEEE 7th International Conference on Computational Cybernetics, ICCC 2009

作者： Soumelidis, Alexandros Bokor, József Schipp, Ferenc Computer and Automation Research Institute Hungarian Academy of Sciences Kende 13-17 Budapest H-1111 Hungary Computer and Automation Research Institute Control Engineering Research Group Hungarian Academy of Sciences Kende 13-17 Budapest H-1111 Hungary Department of Numerical Analysis Faculty of Informatics Eötvös Loránd University Pazmany Peter Setany 1/C Budapest H-1117 Hungary

ISBN: (纸本)9781424453115

This paper investigates signal and system representations in special rational orthogonal bases of the Hardy space H2. These bases are derived from the Blaschke-group associated to the hyperbolic group SH(n) of matrices. Using the concept of the unitary group representations over H 2, and the voice-transform, specific hyperbolic wavelet constructions - Blaschke-wavelets and the associated Blaschke-Fourier transform are constructed. State space representations of systems over hyperbolic groups are discussed, too, with the purpose to explore the perspectives of elaborating a unified system theory upon this conceptual base. ©2009IEEE.

关键词： State space methods

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Test-Data Generation for Web Services Based on Contract Mutation

Test-Data Generation for Web Services Based on Contract Muta...

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2009 Third IEEE International Conference on Secure Integration and Reliability Improvement SSIRI 2009(第三届IEEE安全软件集成及可信性改进国际会议)

作者： Ying-Na Li Ying Jiang Shan-Shan Hou Lu Zhang Faculty of Information Engineering and Automation Kunming University of Science and Technology Kun Institute of Software School of Electronics Engineering and Computer Science Peking University Be Institute of Software School of Electronics Engineering and Computer Science Peking University Be

ISBN: (纸本)9780769537580

Software testing is one of the most important techniques used to assure the quality of Web Services at present. Test-data generation is an important topic in Web Services testing. The quality of test data will influence the efficiency and cost when testing Web Services. Based on the contract-based mutation testing technique, this paper presents a method of automated test-data generation for Web Services. First, according to the description information and contracts in WSDL documents of Web Services, initial test data are generated automatically by the random method. Then the test data are selected using contract mutation testing. This method can generate a test suite meeting a certain contract mutation score, which indicates the quality and efficiency of testing. Finally, we have developed a prototype on the *** platform, and carried out some experiments. The results have shown that the proposed method is effective in automated test-data generation for Web Services.

关键词： Web Service observational data contract data generation program testing

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Dynamic GTS Scheduling of Periodic Skippable Slots in IEEE 802.15.4 Wireless Sensor Networks

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IFAC Proceedings Volumes 2009年第3期42卷 110-117页

作者： Tiago Semprebom Carlos Montez Ricardo Moraes Francisco Vasques Paulo Portugal Automation and Systems Department Federal University of Santa Catarina Florianopolis Brazil Computer Science Department UFSC Florianopolis Brazil UISPA/ISR Faculty of Engineering University of Porto Porto Portugal

The IEEE 802.15.4 standard offers a flexible communication solution for low-rate wireless small area networks. When the beacon mode is enabled, real-time communication is possible by using the Guaranteed Time Slots (GTS) mechanism. However, the beacon-enabled mode only supports a maximum of seven GTS allocated in each superframe, preventing other nodes to benefit from the guaranteed service. This paper introduces the SIGHT (Skips In GTS scHeduling for IEEE 802.15.4 neTworks) model, which incorporates a dynamic GTS allocation policy for IEEE 802.15.4 networks based on the (m,k)-firm task model. Our approach ensures that at least m messages are allocated in a guaranteed slot, for any k consecutive superframes. It adopts a deterministic schedulability test and an on-line prioritization heuristic algorithm called Slotted DBP (Distance Based Priority) to attend requests according to this schedulability model. A simulation model has been developed, in order to compare the behaviour in overload conditions of the proposed Slotted DBP with other approaches (DWCS and FIFO).

关键词： IEEE 802.15.4 WLAN real-time systems (m,k)-firm scheduling QoS

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Redundancy method used in PLC related applications

Redundancy method used in PLC related applications

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International Workshop on Soft Computing Applications (SOFA)

作者： Gianina Gabor Doina Zmaranda Cornelia Gyorodi Sanda Dale Faculty of Electrical Engineering and Information Technology Department of Computer Science University of Oradea Oradea Romania Faculty of Electrical Engineering and Information Technology Department of Automation and Electrical Drives University of Oradea Oradea Romania

PLC related applications are more complex as far as more components are involved. If some error occurs, diagnosis can take some time, but a logical procedure will shorten the time needed to locate the fault. The probability of failure of different parts of typical PLC systems shows that 95% of PLC systems are external faults and occur on plant items such as: sensors, actuators, transducers, limit switchers, and others. The possibility of determining the validity of the data gathered from all transducers of the control system assures a way of short time fault detection. Consequently, a fault-tolerant control system must be implemented using redundant structures, representing an alternative for malfunctioning element detection. This paper presents a method used to design and implement a control system based on redundant structures. A case study for the geothermal power plant at the University of Oradea was developed. The redundant structure considered was simulated using MathLab/Simulink and analyzed using different scenarios. Finally, a possible implementation of resulting control system structure is done using a programmable logical controller (PLC).

关键词： Programmable control Control systems Transducers Fault detection Redundancy Fault diagnosis Sensor systems Actuators Fault tolerant systems Design methodology

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On the identification of LPV traffic flow model 10

On the identification of LPV traffic flow model

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2009 10th European Control Conference, ECC 2009

作者： Luspay, T. Kulcsar, B. Van Wingerden, J.W. Verhaegen, M. Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences Kende u. 13.-17 BudapestH-1111 Hungary Delft Center for System and Control Faculty of Mechanical Maritime and Materials Engineering Technical University of Delft Mekelweg 2 Delft Netherlands

ISBN: (纸本)9783952417393

关键词： LPV Identification Linear Parameter Varying (LPV) systems freeway traffic modeling Traffic flow Authentication Subspace systems comparison Loop detector nonlinearity Flow models

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Distributed state and unknown input estimation for freeway traffic flow models 10

Distributed state and unknown input estimation for freeway t...

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2009 10th European Control Conference, ECC 2009

作者： Luspay, T. Kulcsar, B. Tettamanti, T. Varga, I. Bokor, J. Systems and Control Laboratory Computer and Automation Research Institute HAS Kende u. 13.-17 BudapestH-1111 Hungary Delft Center for System and Control Faculty of Mechanical Maritime and Materials Engineering Technical University of Delft Mekelweg 2 Delft Netherlands Department of Control and Transport Automation Budapest University of Technology and Economics Bertalan L. u. 2 BudapestH-1111 Hungary

ISBN: (纸本)9783952417393

The paper presents a joint state and unmeasured input estimation technique for a special class of nonlinear second order macroscopic traffic model. The freeway traffic system is transformed into a quasi and affine approximate Lin- ear Parameter Varying (LPV) form. Observer design technique is formulated using off-line optimization problem subjected to Linear Matrix Inequality (LMI) conditions, considering uncertain scheduling parameters. Furthermore, locally designed state estimators are interconnected to cover multiple freeway sections. The elaborated method is validated using real traffic measurements. © 2009 EUCA.

关键词： Linear matrix inequalities

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Noninvasive Continuous Blood Pressure Measurement and GPS Position Monitoring of Patients

Noninvasive Continuous Blood Pressure Measurement and GPS Po...

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IEEE Conference on Vehicular Technology (VTC)

作者： Ondrej Krejcar Zdenek Slanina Jan Stambachr Petr Silber Robert Frischer Department of Measurement and Control Faculty of Electrical Engineering and Computer Science Technical University of Ostrava Ostrava Czech Republic Department of Automation and Computing in Metallurgy Faculty of Metallurgy And Materials Engineering Technical University of Ostrava Ostrava Czech Republic

ISBN: (纸本)9781424425143

Need of blood pressure measurement is usable in wide spectrum of applications from physicians offices to home care applications. Many types of blood pressure measurement devices can be bought in electronics shops. All such devices are measurement devices which need to be in contact with human body (hand or foot mainly). Further they allow only one measurement per several minutes interval (typically 10 minutes). Our goal is to develop a small device for noninvasive continuous measurement of blood pressure. This device must be a small battery powered embedded system which measures a blood pressure during a long time period and sends this information to remote operator's stations. In this station the analysis of receiving video data is made for several types of usage. In current state we develop a small device to scan a video or a set of images with the NIR (Near Infra Red) CCD camera. The video data are transferred by wireless connection to the computer where they are analyzed. The first results provide an indication to be a right way to obtain exact continuous blood pressure information. In the future there exists a way to integrate this blood pressure measurement system to concurrently developed biotelemetric system architecture for patients and physicians called Guardian. For position monitoring in outdoor areas there is developed GPS module which informs about patient location and brings very precise time basis for other measuring modules of Guardian system and time synchronization.

关键词： Blood pressure Biomedical monitoring Position measurement Pressure measurement Global Positioning System Patient monitoring Battery charge measurement Time measurement Humans Foot

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Estimating the State of Distributed Dynamical Systems Based on Limited Measurements by means of Cooperative Filtering with Application to ad-hoc Vehicle Network

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IFAC Proceedings Volumes 2009年第8期42卷 929-934页

作者： A. Edelmayer M. Miranda Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences Kende u. 13-17 H-1111 Budapest Hungary Faculty of Engineering University of Los Andes Mérida Venezuela

In this paper a decentralized approach to state estimation of distributed dynamical systems over unreliable communication network subject to uncertain and limited measurements is addressed. Specifically, a distributed filtering concept for enhancing the estimation accuracy of vehicles state from uncertain position data in ad-hoc vehicle networks is presented. The filter relies on a variety of position measurements obtained from the on-board vehicle positioning system, from other nearby cooperating vehicles, as well as from the immediate roadside environment via communication. Direct distance measurements between vehicles as well as between vehicles and the static elements of the roadside infrastructure can be used, if available, as highly accurate reference measurements. The paper demonstrates how successfully the idea of cooperative filtering in addressing the demands of both sensor fault tolerance and enhanced estimation accuracy in distributed systems over ad-hoc communication networks can be used.

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