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International Conference on Computer engineering and Applications (ICCEA)

作者： Ondrej Krejcar Michal Tutsch Robert Frischer Ivo Spicka Department of Measurement and Control Faculty of Electrical Engineering and Computer Science VSB-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)9781424460793;9780769539829

Most systems are controlling by common PID controllers. These PID controllers are available in variety possibilities. They are divided by types of controlling systems, by speed of action interference, by complexity, by robustness etc. Most of industrial controllers are very expensive and except of some basic setting they are not offering any other way, how to involve into controlling process. On the other side, developing new analog controller to control simple systems is not reasonable in financial or time issue. That's why we decided to build simple, discrete controller and implement its algorithm into single chip eight bit microcontroller (MCU). This discrete controller - PSD - is characteristic its simplicity and variability. It can control plenty of less complicated systems by a mere change of its characteristic parameters. Thanks to modern approach is possible to create a full-featured controller including power action element on an area equal to 7cm 2 .

关键词： Costs Power electronics control systems Three-term control Interference Robust control Electrical equipment industry Industrial control Process control Microcontrollers

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Robust Adaptive Sliding-Mode control for Fuzzy Systems With Mismatched Uncertainties

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IEEE Transactions on Fuzzy Systems 2010年第4期18卷 700-711页

作者： Jinhui Zhang Peng Shi Yuanqing Xia Department of Automatic Control Beijing Institute of Technology Beijing China School of Engineering and Science Victoria University Melbourne VIC Australia School of Mathematics and Statistics University of South Australia Adelaide SA Australia Department of Computing and Mathematical Sciences University of Glamorgan Pontypridd UK

This paper is devoted to design adaptive sliding-mode controllers for the Takagi-Sugeno (T--S) fuzzy system with mismatched uncertainties and exogenous disturbances. The uncertainties in state matrices are mismatched and norm-bounded, while the exogenous disturbances are assumed to be bounded with an unknown bound, which is estimated by a simple and effective adaptive approach. Both state- and static-output-feedback sliding-mode-control problems are considered. In terms of linear-matrix inequalities (LMIs), both sliding surfaces and sliding-mode controllers can be easily obtained via a convex optimization technique. Finally, two simulation examples and a real experiment are utilized to illustrate the applicability and effectiveness of the design procedures proposed in this paper.

关键词： Robust control Programmable control Adaptive control Sliding mode control Fuzzy systems Uncertainty control systems Takagi-Sugeno model Linear matrix inequalities State estimation

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Robust finite-horizon filtering of time-varying networked systems with error variance constraints

Robust finite-horizon filtering of time-varying networked sy...

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2010 8th IEEE International Conference on control and Automation, ICCA 2010

作者： Dong, Hongli Wang, Zidong Ho, Daniel W.C. Gao, Huijun College of Electrical and Information Engineering Daqing Petroleum Institute Daqing 163318 China Space Control and Inertial Technology Research Center Harbin Institute of Technology Harbin 150001 China Department of Information Systems and Computing Brunel University Uxbridge Middlesex UB8 3PH United Kingdom Department of Mathematics University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong

ISBN: (纸本)9781424451951

In this paper, the robust finite-horizon filtering problem is investigated for a class of uncertain nonlinear discrete time-varying stochastic systems with multiple missing measurements and error variance constraints. The stochastic nonlinearities are described by statistical means which can cover several classes of well-studied nonlinearities. The measurement missing phenomenon is also considered. Sufficient conditions are derived for a finite-horizon filter to satisfy the estimation error variance constraints. These conditions are expressed in terms of the feasibility of a series of recursive linear matrix inequalities (RLMIs). An illustrative simulation example is given to show the the effectiveness of the proposed algorithm. © 2010 IEEE.

关键词： Stochastic systems

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A Prediction Based Long-Cycle Time Synchronization Algorithm for Sensor Networks

A Prediction Based Long-Cycle Time Synchronization Algorithm...

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2010 IEEE Global Telecommunications Conference GLOBECOM 2010

作者： Wentao Jiang Limin Sun Junwei Lv Feng Wang Department of Control Engineering Naval Aeronautical and Astronautical University Yantai China Institute of Software Chinese Academy and Sciences Beijing China School of Computing Science Simon Fraser University BC Canada

Existing time synchronization algorithms and protocols mostly focus on improving the synchronization accuracy. However, they usually require frequent resynchronization to keep designed precision in actual applications, which leads to high energy consumption and heavy traffic load. This paper presents a Prediction based Long-cycle Time Synchronization algorithm (PLTS), which puts emphasis on reducing the resynchronization frequency while guaranteeing a given accuracy. PLTS is a combination of periodic synchronization and prediction synchronization. It makes use of an existing time synchronization protocol to accomplish the periodic synchronization, while during the intervals of periodic synchronization, each node applies a prediction model to calibrate its own logic time according to the crystal oscillator's frequency characteristics. By this means, all nodes can keep synchronization till next periodic synchronization starts. Experiment results show that PLTS can reduce resynchronization frequency remarkably and possesses good merits in saving energy and reducing traffic load.

关键词： Synchronization Crystals Oscillators Time frequency analysis Peer to peer computing Temperature Accuracy

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Modular fuzzy control with input shaping technique for transformation of two-wheeled wheelchair to four-wheeled mode

Modular fuzzy control with input shaping technique for trans...

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IEEE Symposium on Industrial Electronics & Applications (ISIEA)

作者： Salmiah Ahmad M. O. Tokhi N. H. Siddique Department of Mechatronics International Islamic University Malaysia Kuala Lumpur Malaysia Automatic Control & Systems Engineering University of Sheffield Sheffield UK School of Computing & Intelligent System University of Ulster UK

This paper presents a mechanism for wheelchair transformation from two-wheeled upright position to four-wheeled position using a modular fuzzy logic control (MFC) approach. A wheelchair model that can be operated in four-wheeled and two-wheeled modes has been developed within the Visual Nastran environment and integrated with Simulink for control purposes. A multi-input multi-output modular fuzzy logic control configuration is designed and implemented on the wheelchair model. To improve the system performance, an input shaping technique is augmented inside the feedback loop. It is shown that the shaped signals have improved the system performance with promising results.

关键词： Wheelchairs Niobium Wheels Mathematical model Torque Fuzzy control Conferences

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Use of accelerometers for material inner defect detection

Use of accelerometers for material inner defect detection

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International Conference on Applied Electronics, AE

作者： Ondrej Krejcar Robert Frischer Department of Measurement and Control Center of Applied Cybernetics Faculty of Electrical Engineering and Computer Science VSB-Technical University of Ostrava Ostrava Czech Republic Department of Automation and Computing in Metallurgy VSB-Technical University of Ostrava Ostrava Czech Republic

This paper deals with a possibility of non-destructive diagnostics of solid objects by software analysis of vibration spectrum by accelerometers. By a use of MATLAB platform, a processing and information evaluation from accelerometer is possible. Accelerometer is placed on the measured object. The analog signal needs to be digitized by a special I/O device to be processed offline with FFT (Fast Fourier Transformation). The power spectrum is then examined by developed evaluating procedures.

关键词： Accelerometers Vibrations Software Conferences Distortion measurement Converters Unified modeling language

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Notice of Retraction: Material inner defect detection by a vibration spectrum analysis

Notice of Retraction: Material inner defect detection by a v...

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International Conference on Mechanical and Electronics engineering (ICMEE)

作者： Ondrej Krejcar Robert Frischer Department of Measurement and Control Center for Applied Cybernetics Faculty of Electrical Engineering and Computer Science VSB-Technical University of Ostrava Ostrava Czech Republic Department of Automation and Computing in Metallurgy VSB-Technical University of Ostrava Ostrava Czech Republic

This article has been retracted by the publisher.

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Meta-analysis of the TAEE project applying social network analysis

Meta-analysis of the TAEE project applying social network an...

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2010 IEEE Education engineering Conference, EDUCON 2010

作者： López Vargas, Jorge A. Piedra, Nelson Chicaiza, Jeanneth Tovar, Edmundo Blázques, Manuel Castro, Manuel Arriaga, Jesús Pescador, Fernando Romo, Jesús Casquero, Oskar Benito, Manuel Landaluce, Ariana Computer Sciences School Universidad Técnica Particular de Loja Loja Ecuador School of Computing Universidad Politécnica de Madrid Madrid Spain Industrial Engineering School Universidad Nacional de Educación A Distancia Madrid Spain Control and Electronic Systems Department Universidad Politécnica de Madrid Madrid Spain Universidad Del País Vasco Bilbao Spain

ISBN: (纸本)9781424465682

The social network analysis (SNA) is an approach that can be applied as a complement to other analysis (such as statistical) in order to obtain other valuable information. The social network analysis has been used in several initiatives showing that it is an approach that can contribute in building the semantic web. Within the project Technologies Applied to Electronics Teaching (TAEE) there are biannual conferences (it has been organized since 1996) and have accumulated a significant amount of data resulting from the conferences held. All of this information constitutes a data source that should be exploited and that can provide meaningful information. In this document we describe, how to social network analysis has been used on data sources generated by user communities, in order to obtain some semantic artifacts, like ontologies. Also describes how to was applied the social network analysis and its metrics on the information generated in the TAEE congresses to answer a set of questions (What are the relationships and the level of cohesion of the different organizations (at the level of Spain and across continents) involved in TAEE? How have evolutioned the thematics covered in the conference?, What are the new ontological additions in technology over the years?, and How have evolutioned the thematics in the research and studies related to teaching electronics?) formulated by the organizers of the congresses and that through other approaches would have been a large task and complicated. The answers to the questions can provide us important information about the behavior and characteristics of the elements present in TAEE conferences, furthermore being an element for making decisions on future initiatives with the same style of TAEE. © 2010 IEEE.

关键词： Ontology

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Label-Based DV-Hop Localization Against Wormhole Attacks in Wireless Sensor Networks

Label-Based DV-Hop Localization Against Wormhole Attacks in ...

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International Conference on Networking, Architecture, and Storage (NAS)

作者： Junfeng Wu Honglong Chen Wei Lou Zhibo Wang Zhi Wang Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Hong Kong China State Key Laboratory of Industrial Control Technology University of Zhejiang China Department of Computing Hong Kong Polytechnic University Hong Kong China

Node localization becomes an important issue in the wireless sensor network as its broad applications in environment monitoring, emergency rescue and battlefield surveillance, etc. Basically, the DV-Hop localization mechanism can work well with the assistance of beacon nodes that have the capability of self-positioning. However, if the network is invaded by a wormhole attack, the attacker can tunnel the packets via the wormhole link to cause severe impacts on the DV-Hop localization process. The distance-vector propagation phase during the DV-Hop localization even aggravates the positioning result, compared to the localization schemes without wormhole attacks. In this paper, we analyze the impacts of wormhole attack on DV-Hop localization scheme. Based on the basic DV-Hop localization process, we propose a label-based secure localization scheme to defend against the wormhole attack. Simulation results demonstrate that our proposed secure localization scheme is capable of detecting the wormhole attack and resisting its adverse impacts with a high probability.

关键词： Labeling Wireless sensor networks Bismuth Relays Monitoring Buildings Feature extraction

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Research on the Mobility Management Scheme in Heterogeneous Network

Research on the Mobility Management Scheme in Heterogeneous ...

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International Conference on Electrical and control engineering (ICECE)

作者： Xin Yang Chong Li Xin-sheng Ji National Digital Switching System Engineering &Technological Research Center People''s Liberation Army Information and Engineering University Zhengzhou China Department of Information Control PLA Air defense forces command academy Zhengzhou China Computing Laboratory The University of Oxford UK Training Department People''s Liberation Army Information and Engineering University Zhengzhou China

Aiming at moving aspect of heterogeneous wireless network, The paper puts forward a heterogeneous network mobile management mechanism- Identifiers Split Memory, Substitution Transmission Scheme ISMSTS, introduces the basic theory and the protocol process of ISMSTS detailed, and makes the performance analysis and the contrast with MIPv6 protocol. ISMSTS is the mobile management scheme based on the network, both of the position and switch management are accomplished by the network. It can satisfy the needs of the heterogeneous converged network mobile management mechanism on fast switching, extensible, controllable, safety and reducing of wireless link costs. Theoretical analysis shows that on the network layer the average switching lag time of network ISMSTS much less than MIPv6's, which can effectively support most real-time application. And the realization and verification of the prototype system further illustrates the feasibility and the effectiveness of the ISMSTS.

关键词： Mobile communication Authentication Switches Delay Mobile computing Wireless communication Servers

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