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IEEE PES Asia-Pacific Power and Energy engineering Conference (APPEEC)

作者： Pairoj Kajoijilertsakul Santi Asawasripongtorn Peerayot Sanposh Jittiwut Suwatthikul Hideaki Fujita Department of Electrical Engineering Faculty of Engineering Kasetsart University Bangkok Thailand Industrial Control and Automation Laboratory National Electronics and Computer Technology Center Bangkok Thailand Department of Electrical and ElectronicEngineering Tokyo Institute of Technology Tokyo Japan

This paper presents modeling of the 500 kV transmission line located between Bang-Saphan 2 (BSP2) and Chom-Bung (CBG) substations, Thailand. The network is modeled based on the transient simulation program- PSCAD/EMTDC. The equivalent circuit of BSP2 and CBG is obtained from the actual parameters. The initial condition parameters are verified by PSS/E, an electrical simulation program. After the modeling has been established, a fault analysis is done by using PSCAD/EMTDC in order to study the system response when fault constrains are applied. This paper has illustrated that how the information on the sampled voltage and current waveforms derived from PSCAD/EMDTC modeling and simulation can be used for fault detection, classification and location.

关键词： Integrated circuit modeling Circuit faults PSCAD EMTDC Protective relaying Power transmission lines RLC circuits

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Wavelet based fault detection, classification and location in existing 500 kV transmission line

Wavelet based fault detection, classification and location i...

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International Conference on Electrical engineering/Electronics, computer, Telecommunications and Information Technology, ECTI-CON

This paper describes the implementation of Wavelet Transform and Spectral Energy analysis on samples of simulated voltage and current waveforms obtained from PSCAD/EMTDC for each of the all possible fault scenarios in a modeled 500 kV transmission network. The fault detection and classification of each fault scenarios is determined based on results of the voltage and current waveforms analysis in time and wavelet domains. The analysis is carried out including variation in fault types, inception angles and locations with a practically arbitrarily assumed fault duration. The analytical results shows that the described technique is highly dependable and is able to detect and classify different kinds of faults along a transmission line whatever is the fault type, inception angle and location.

关键词： Entropy PSCAD EMTDC Power measurement TV Tin Surges

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Decentralized Task Sequencing and Multiple Mission Control for Heterogeneous Robotic Networks

Decentralized Task Sequencing and Multiple Mission Control f...

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2011 IEEE International Conference on Robotics and automation(2011年IEEE世界机器人与自动化大会 ICRA 2011)

作者： Donato Di Paola Andrea Gasparri Giovanni Ulivi David Naso Frank L. Lewis Institute of Intelligent Systems for Automation (ISSIA) National Research Council (CNR)70126 BariI Faculty of Engineering Computer Science and Automation DepartmentUniversity "Roma Tre"00146 RomeI Department of Electrical and Electronic Engineering (DEE) Polytechnic of Bari70126 BariItaly the Automation and Robotics Research Institute University of Texas at ArlingtonFort WorthTX 76118-

In this paper a novel decentralized approach for task sequencing within a multiple missions control framework is presented. The main contribution of this work concerns the decentralization of a control framework for multiple mission execution in order to enhance the robustness of the system, and the application of the latter to a heterogeneous robotic network. The proposed approach is based on the Matrixbased Discrete Event Framework (MDEF). This formalism is adapted to networks of heterogeneous robots, i.e., robots with different capabilities, and to the decentralized control of mission execution using a consensus-based approach which guarantees the agreement among robots on executed actions and their consequences.

关键词： Mathematical model Equations Resource management Robot sensing systems Availability Multiagent systems

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A novel type of trigonometric neural network trained by Extended Kalman Filter

A novel type of trigonometric neural network trained by Exte...

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International Workshop on Advanced Computational Intelligence (IWACI)

作者： M. Norouzi M. Mansouri M. Teshnehlab M. Aliyari Shoorehdeli Faculty of Engineering Department of Computer Engineering Science and Research Branch Islamic Azad University Iran Intelligent System Laboratory (ISLAB) Faculty of Electrical Engineering Control Department K.N. Toosi University of Technology Tehran Iran Faculty of Electrical Engineering Department of Mechatronics Engineering Advanced Process Automation &Control Laboratory (APAC) K.N. Toosi University of Technology Tehran Iran

In this study, a new type of trigonometric neural network is presented by adding frequency and phase to trigonometric activation functions. The proposed trigonometric neural network has more flexibility in comparison with conventional trigonometric neural networks and even other types of neural networks. Due to the low convergence rate and high posibility of trapping in a local minimum of backpropagation algorithm, Extended Kalman Filter algorithm is used to train the neural network's parameters which they appear in a nonlinear form. The Simulation of the suggested neural network based on the prediction of Mackey-Glass time series and identification of a nonlinear dynamic ystem reveals the efficiency of the proposed network. To show the efficiency of this method, the results are compared with the results of the others.

关键词： Biological neural networks Kalman filters Equations Neurons Vectors Covariance matrix Mathematical model

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A simple optimization method based on Backtrack and GA for delivery schedule

A simple optimization method based on Backtrack and GA for d...

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Congress on Evolutionary Computation

作者： Yoshitaka Sakurai Kouhei Takada Natsuki Tsukamoto Takashi Onoyama Rainer Knauf Setsuo Tsuruta School of Information Environment Tokyo Denki University Chiba Japan Research & Development Department Hitachi Software Engineering Company Limited Tokyo Japan Faculty of Computer Science and Automation Ilmenau University of Technology Ilmenau Germany

A delivery route optimization system greatly improves the real time delivery efficiency. To realize such an optimization, its distribution network requires solving several tens to hundreds (max. 1500-2000) cities Traveling Salesman Problems (TSP) within interactive response time (around 3 seconds) with expert-level accuracy (below 3% level of error rate). Moreover, as for the algorithms, understandability and flexibility are necessary because field experts and field engineers can understand and adjust it to satisfy the field conditions. To meet these requirements, a Backtrack and Restart Genetic Algorithm (Br-GA) is proposed. This method combines Backtracking and GA having simple heuristics such as 2-opt and NI (Nearest Insertion) so that, in case of stagflation, GA can restarts with the state of populations going back to the state in the generation before stagflation. Including these heuristics, field experts and field engineers can easily understand the way and use it. Using the tool applying their method, they can easily create/modify the solutions or conditions interactively depending on their field needs. Experimental results proved that the method meets the above-mentioned delivery scheduling requirements more than other methods from the viewpoint of optimality as well as simplicity.

关键词： Genetic algorithms Nickel Cities and towns Optimization Humans Error analysis Real time systems

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Ensuring Diversity in a Backtrack and GA Optimization Method for Delivery Schedule

Ensuring Diversity in a Backtrack and GA Optimization Method...

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International IEEE Conference on Signal-Image Technologies and Internet-Based System

Delivery route optimization greatly improves the delivery efficiency in terms of all resources including human resources and energy consumption. In our application scenario the distribution network requires solving several tens to hundreds (max. 1500-2000) cities Traveling Salesman Problems (TSP) within interactive response time (around 3 seconds) with expert-level accuracy (below 3% level of error rate). Moreover, since domain experts have to adjust the solutions due to boundary conditions that can not be formally expressed (such as human convenience, road conditions, and social aspects), understandability and flexibility of the applied heuristics are necessary. To meet all these requirements, a Backtrack and Restart Genetic Algorithm (Br-GA) was proposed. This method combines Backtracking and GA having simple heuristics such as 2-opt and NI (Nearest Insertion) so that, in case of stagflation, GA can restarts with the state of populations going back to the state in the generation before stagflation. Here, a refinement of this algorithm is introduced, which aims at ensuring diversity of initial solutions, which are subject to mutation. We introduce a formal definition of a diversity degree as well as a technique to compose new random individuals, which follow a required degree of diversity.

关键词： Genetic algorithms Nickel Cities and towns Humans Optimization Error analysis Traveling salesman problems

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Proposal of educational environments with mobile robots

Proposal of educational environments with mobile robots

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IEEE Conference on Robotics, automation and Mechatronics

作者： Silas F. R. Alves Humberto Ferasoli Filho René Pegoraro Marco A. C. Caldeira João M. Rosário Wilson M. Yonezawa Laboratory of Integrated Automation and Robotics Mechanical Project Department Faculty of Mechanical Engineering State University of Campinas Campinas Sao Paulo Brazil Laboratory of Integration of Intelligent Systems and Devices Computer Department Sciences Faculty University of São Paulo State Bauru Brazil

This paper describes an initiative which uses low-cost mobile robots to create robotics courses and learning environment to support the teaching of computing and many other related disciplines. The pursued principle is that lower cost alternatives that can meet the educational needs, since it is accompanied by an environment with friendly software interface. In this sense, the hardware interface was developed to allow the computer to process data from the sensors and actuators of the mobile robot. This architecture is adequate because of the acceptance of students in their use, since the environment is unrolled within a familiar platform to them.

关键词： Robot sensing systems computer architecture computers Mobile robots Educational robots

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Swarm-based neighbourhood search for fuzzy job shop scheduling

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International Journal of Innovative Computing and Applications 2011年第3期3卷 144-151页

作者： Zheng, You-Lian Li, Yuan-Xiang Lei, De-Ming State Key Laboratory of Software Engineering Wuhan University Wuhan 430072 China Faculty of Mathematics and Computer Science Hubei University Wuhan 430062 China School of Automation Wuhan University of Technology Wuhan 430070 China Shanghai Jiaotong University Shanghai China

In this paper, fuzzy job shop scheduling problems are considered and an efficient swarm-based neighbourhood search (SNS) is proposed, in which an ordered operation-based representation and the decoding procedure are given. It is proved that most of possible actual completion times lie in the cut of fuzzy completion time for each job. In SNS, adaptive swap operation and binary tournament selection are applied to update swarm. SNS is compared with some methods from literature and computational results demonstrate that SNS has promising advantage on fuzzy scheduling. © 2011 Inderscience Enterprises Ltd.

关键词： Job shop scheduling

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2D Phononic Crystal Sensor with Normal Incidence of Sound

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Procedia engineering 2011年 25卷 787-790页

作者： R. Lucklum M. Zubtsov M. Ke B. Henning U. Hempel Institute of Micro and Sensor Systems (IMOS) Otto-von-Guericke-University Magdeburg Germany Department of Physics Wuhan University Wuhan PR China Faculty of Electrical Engineering Computer Science and Mathematics University of Paderborn Germany Institute for Automation and Communication (ifak) Magdeburg Germany

This contribution shows the sensor application of a resonance-induced extraordinary transmission through a regular phononic crystal consisting of a metal plate with a periodic arrangement of holes in a square lattice at normal incidence of sound. The characteristic transmission peak has been found to strongly depend on liquid sound velocity. The respective peak maximum frequency can therefore serve as measure for liquid analysis. Experimental verification has been performed with mixtures of water and propanol as model system. Numerical calculations based on COMSOL and EFIT reveal more insides to the wave propagation characteristics. Experimental investigations with Schlieren method and laser interferometry support the theoretical findings.

关键词： Phononic crystal sensor Liquid sensor

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Stability analysis of fuzzy logic control systems for a class of nonlinear SISO discrete-time systems

Stability analysis of fuzzy logic control systems for a clas...

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作者： Precup, Radu-Emil Tomescu, Marius-Lucian Preitl, Stefan Petriu, Emil M. Dragoş, Claudia-Adina Department of Automation and Applied Informatics Politehnica University of Timisoara Bd. V. Parvan 2 RO-300223 Timisoara Romania Computer Science Faculty Aurel Vlaicu University of Arad Complex Universitar M Str. Elena Dragoi 2 RO-310330 Arad Romania School of Information Technology and Engineering University of Ottawa 800 King Edward Ottawa ON K1N 6N5 Canada

ISBN: (纸本)9783902661937

This paper suggests a new stability analysis theorem dedicated to a class of fuzzy logic control systems. The fuzzy logic control systems consist of nonlinear Single Input-Single Output (SISO) discrete-time processes controlled by Takagi-Sugeno fuzzy logic controllers. The stability analysis is conducted on the basis of Lyapunov's direct method with quadratic Lyapunov function candidates. The theorem proves that if the derivative of the Lyapunov function candidate is negative definite in the active region of each fuzzy rule then the fuzzy logic control system will be asymptotically stable in the sense of Lyapunov. Sufficient stability conditions are offered. An example related to the design of a stable fuzzy logic control system for the discrete-time Lorenz chaotic system and simulation results are included. © 2011 IFAC.

关键词： Lyapunov functions

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