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IEEE/Power and Energy Society Transmission and Distribution Conference and Exposition

作者： Cabral, S.H.L. Mustafa, T.I.A.H. Almaguer, H.A.D. Santos, T. Nascimento, C.V. Department of Electrical Engineering and Telecommunication FURB Brazil Master Program of Elec. Engineering FURB Brazil CELESC Brazil

ISBN: (纸本)9781457704871

Distribution transformer is a very important equipment that allows the delivery of electricity with a high degree of capillarity. As a consequence, all of the conductors of a distribution network become a way for bringing into a transformer voltage surges, especially those yielded by lightning. These effects have been intensively studied along the last decade in attempt to clarify how a transformer allows transference of voltage surges as well as to understand what happens inside it. One of the most used methodologies for its analysis is based on its frequency response. Thus, the aim of this work is to analyze some of the most usual premises for experimental tests of frequency response, by discussing their applicability as well as its usefulness. An experimental case is presented. © 2011 IEEE.

关键词： Frequency response

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A Vision-Based Neural Networks Model for Turbine Trench-Filler Diagnosis 1

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7th International Congress and Workshop on Industrial AI and eMaintenance, IAI 2023

作者： Isaza, Cesar Guerrero-Garcia, Fernando Anaya, Karina Jenab, Kouroush Ortega-Moody, Jorge Networking and Telecommunication Academic Program Polytechnic University of Queretaro Queretaro Mexico Productive System Master Academic Program Polytechnic University of Queretaro Queretaro Mexico School of Engineering and Computer Science Morehead State University MoreheadKY40351 United States

ISBN: (数字)9783031396199

ISBN: (纸本)9783031396182

Vision-based neural networks as artificial intelligence models have been critical in many manufacturing industries, including automotive, food, and aerospace. Machine vision and deep learning have provided practical, promising, and accessible innovations to address many problems during manufacturing and diagnostics. Recent studies offer beneficial results in implementing industrial artificial intelligence systems that require determining, comparing, and evaluating optimal technological solutions. The aerospace industry has to deal with the problem of diagnosing critical components that continually need the expertise of a trained human being. On the other hand, automatic diagnostics are becoming a critical technology to deal with this problem. However, these systems require a particular configuration of computer vision algorithms which, in the case of turbine trench-filling components, have yet to be added to the literature. Considering the above, we report in this paper a new methodology that uses a pre-trained deep neural network framework available online to automatically diagnose geometric nonconformities in aeronautical components that protect the turbines from vibrations and reduce noise from the engines to the aircraft deck. The method is based on the following stages: a computer vision system with a monochrome camera to acquire images, training of deep neural networks with transfer learning, and a stage to analyze nonconformities automatically. In addition, a benchmark of several pre-trained deep neural networks is presented to address the problem. According to the experimental results, the YOLO deep neural network topology significantly contributes to automatic diagnosis with high precision and exact rate. Finally, we show that integrating deep neural networks with control graphs is a promising strategy to optimize online diagnostics in the production lines of the aeronautical industry. © The Author(s), under exclusive license to Springer Nature Switzerland

关键词： Deep neural networks

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The role of the distribution transformer in the transference of voltage surges

The role of the distribution transformer in the transference...

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IEEE/PES Transmission and Distribution Conference and Exposition: Latin America

作者： S. H. L. Cabral T. I. A. H. Mustafa H. A. D. Almaguer T. Santos C. V. Nascimento Department of Electrical Engineering & Telecommunication FURB Brazil Master Program of Electrical Engineering FURB Brazil CELESC Brazil

关键词： Frequency response Windings Surges Power transformer insulation Electrical engineering Integrated circuit modeling Oil insulation

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Mobile phone auto registration to OpenBTS-based cellular network in disaster situation

Mobile phone auto registration to OpenBTS-based cellular net...

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International Conference on telecommunication Systems, Services, and Applications (TSSA)

作者： Elvanno Hatorangan Tutun Juhana Telematics and Telecommunication Network Master Program School of Electrical Engineering and Informatics Institute of Technology Bandung Bandung Indonesia

When disasters occurs, cellular network might be down and cannot serve subscribers anymore. On the other hand, many victims trapped in a wreckage might still have access to their mobile phone. An OpenBTS-based cellular network has been long before known as an ideal solution to rapidly deploy emergency GSM cellular network in situation after disaster. The problem arise when victims' mobile phone only associated to the providers' network where the SIM card come. Even though it can manually associate to available network in an emergency situation, but victims' situation and knowledge might prevented them in doing that. In this work we propose method to enable mobile phones automatically associates themselves to OpenBTS-based cellular network.

关键词： Mobile handsets GSM Testing Mobile communication Mobile computing Portable computers Switches

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Recommendations for handling price war between telecom operators in Indonesia

Recommendations for handling price war between telecom opera...

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International Conference on telecommunication Systems, Services, and Applications (TSSA)

作者： Sigit Haryadi Angelia Hermawan Telecommunication Engineering Bandung Institute of Technology Bandung Indonesia Electrical Engineering Master Program Bandung Institute of Technology Bandung Indonesia

This research covers the liberation problem that could not push the operators to compete in service and network development in a fair way. In this research regarding the effect of tariff promotion war in telecommunication industry that is completed included study about the government regulation, the correlation between tariff promotion and the system of voice service traffic, benchmarking with Singapore and Kenya, and analysis. The recommendation that is brought in this research is hope that the government will apply the floor price regulation in order to protect the telecommunication industry in Indonesia.

关键词： Government Industries Correlation telecommunication traffic Benchmark testing

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Performance analysis of adaptive power control based on Signal to Interference Ratio (SIR) using fuzzy genetic for WCDMA

Performance analysis of adaptive power control based on Sign...

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International Conference on Digital Information and Communication Technology and it's Applications (DICTAP)

作者： Firdaus Ali Muayyadi Rina Puji Astuti Dept. of Electrical Engineering Faculty of Industrial Technology UII Yogyakarta Indonesia Master Program on Telecommunication Engineering Telkom Institute of Technology Bandung Indonesia

The number of active users in a cell in the WCDMA system is very limited and influenced by co-channel interference and fading radio channels. Power control is needed to reduce interference by reducing the effects of near-far problem, co-channel interference and fading channels. WCDMA system is required power control that works fast and precisely because radio channels are changing randomly. Fuzzy Genetic Algorithm (FGA) gives the correct solution to the dynamic decision making problem under non-linear conditions, based on simple rules. This paper presents application of adaptive SIR based power control using the FGA on uplink WCDMA system, and compared to fixed step size method using computer simulation. The results confirmed that use of FGA on the SIR-based Power Control for WCDMA systems increases the number of active users while maintaining QoS standards. This is shown by the decline in value of outage probability compared to fixed step methods. Average outage probability at fixed power control step is 0.270036 while the FGA power control is 0.18465.

关键词： Power control Multiaccess communication Genetic algorithms Spread spectrum communication Tin Fading Manganese

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An Assitive Walker considering with its User's Gait Difference of Both Feet

An Assitive Walker considering with its User's Gait Differen...

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Conference on Human System Interactions, HSI

作者： Kohei Oigawa Daisuke Chugo Satoshi Muramatsu Sho Yokota Hiroshi Hashimoto School of Science and Technology Kwansei Gakuin University Sanda Hyogo Japan School of Science and Information and Telecommunication Engineering Tokai University Kanagawa Hiratsuka Japan Faculty of Science and Engineering Toyo University Saitama Kawagoe Japan Master Program of Innovation for Design and Engineering Advanced Institute of Industrial Technology Shinagawa Tokyo Japan

This paper proposes a novel assistive walker robot, which considers its user's gait. Previous researchers have been developed many assistive walker, and many of them have discussed on obstacles/step avoidance function, path following function and gravity negating gravitational force function. However, by opinions of nursing specialists, the walker is first required to realize safe walking function especially, which prevents falling down of its user. Therefore, it is important to maintain the body balance of its user and considering with the characteristics of its user, the walker should coordinate it according to the walking way of its user. For realizing this, our proposed walker measures the right and left foot gait of its user and estimates its user's body balance by calculating his/her position of center of gravity (COG). Proposed system does not require sensors which are installed on its user's body for practical usage. Using estimated body balance, our proposed walker controls assistance force vector for maintaining body balance stably. A prototype assistive walker, based on the proposed idea is fabricated to help patients walking safely according to their walking gait.

关键词： Foot Legged locomotion Brushless DC motors Thigh Wheels

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Standing Assistance Control based on Voluntary Body Movement within Safety Tolerance

Standing Assistance Control based on Voluntary Body Movement...

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International Workshop on Advanced Motion Control (AMC)

作者： Daisuke Chugo Masahiro Yokota Satoshi Muramatsu Sho Yokota Jin-Hua She Hiroshi Hashimoto Takahiro Katayama Yasuhide Mizuta Atsushi Koujina Graduate School of Science and Technology Kwansei Gakuin University Sanda Hyogo Japan School of Science and Information and Telecommunication Engineering Tokai University Hiratsuka Kanagawa Japan Faculty of Science and Engineering Toyo University Kawagoe Saitama Japan School of Engineering Tokyo University of Technology Hachioji Tokyo Japan Master Program of Innovation for Design and Engineering Advanced Institute of Industrial Technology Shinagawa Tokyo Japan Service Robot Division RT.WORKS CO. LTD Osaka Japan

ISBN: (数字)9781728131894

ISBN: (纸本)9781728131900

This paper proposes a novel standing assistance robot, which considers the posture tolerance of its user. In previous studies, conventional assistive robots did not require patients to use their own physical strength to stand, which leads to decreased strength in the elderly. Therefore, an assistive robot that allows patients to maximally use the physical strength they possess is required. To realize this objective, it is important that a robot assists patients according to their body movement and by their intentions. However, in previous studies, general assistive robots helped patients by using a fixed motion reference pathway in spite of their original intention, and as a result, these robots failed to use the physical strength of the patients. In our previous study, we investigated the posture tolerance during a standing motion. In this tolerance, patients could stand by own muscle strength with stable posture. Thus, as the next step, this paper proposes assistance force control scheme which considers the investigated posture tolerance. Our robot generated assistance force, which lead the voluntary movement with their remaining physical strength within investigated range, by combining position control and force control. A prototype assistive robot, based on the proposed idea was fabricated to help patients stand up safely using the maximum of their remaining physical strength.

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New microscope for measuring the distribution of nonlinear dielectric properties

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ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS 1996年第6期79卷 68-75页

作者： Cho, Y Kirihara, A Saeki, T Department of Electrical and Electronic Engineering Faculty of Engineering Yamaguchi University Ube Japan 755 Received his B.E. M.S. and Dr. of Eng. degrees from Tohoku University in 1980 1982 and 1986 respectively. He joined the University as a Research Associate in the Research Institute of Electrical Communication in 1985. He joined Yamaguchi University in 1990 as an Associate Professor in the Electrical and Electronic Engineering Department. He has been involved in research on nonlinear phenomenon of piezoelectric materials and their application. Received his B.E. degree in Electrical and Electronic Engineering from Yamaguchi University in 1995. He is working at present for the University as a technical official. He has been involved in research on the telecommunication electronic circuits and the application of the piezoelectric materials. Received his B.E. degree in Electrical and Electronic Engineering from Yamaguchi University in 1995 and has been involved in research and development of the scanning nonlinear dielectric microscope system. He is at present in the Master's program in the Electrical Engineering Department of Kyushu University.

This paper describes a new technique for imaging the distribution of nonlinear dielectric constants of ferroelectric materials. This technique is based on the principle that the nonlinear (third-order) dielectric constants (third-rank tensor) are very sensitive to the state of the spontaneous polarization and the quality of the crystallization of materials, while the linear (second-order) dielectric constants (second-rank tensor) are insensitive to them. Applying this principle, a new microscope for measuring the distribution of nonlinear dielectric properties is developed. This new microscope is used to observe the distribution of the polarization of ferroelectric materials such as lead zirconate titanate (PZT) ceramic and piezoelectric polymer.

关键词： ferroelectric materials nonlinear dielectric constant microscope piezoelectric materials

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Modeling Continuous Windings under Transients with TLM and ATP

Modeling Continuous Windings under Transients with TLM and A...

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International Conference on Electrical Machines

作者： S.H.L. Cabral A.S. Nunes M. Januário G. Farina Department of Electrical Engineering & Telecommunication of FURB-Funda??o Universidade Regional de Blumenau in Blumenau SC Brazil Master program at FURB and UFSC-Universidade Federal de Santa Catarina in Florianópolis SC Brazil Department of Electrical Engineering of UNOESC-Universidade do Oeste de Santa Catarina in Joa?aba SC Brazil and doctoral degree student at UFSC electrical engineering student at UNOESC

ISBN: (纸本)9781467301435

This work presents the performance of the wellknown program ATP-Alternative Transient program applied to the simulation of continuous windings of transformer under the incidence of a voltage surge. The motivation for this analysis lies in the fact that once ATP is widely applied for circuit simulation in several conditions, it is expected that it can also be applicable to this problem that is of significant importance for transformer designer. If so, thanks to wide ATP availability designers will have available an easy and user friendly tool for helping in their designs. Basis of analysis is in new experimental data obtained by the authors as well as some other data presented in previously published paper, in which experimental data have also validated applicability of the TLM- Transmission Line Modeling Method for the same problem, known as a classical one for concerns of voltage insulation for transformer designers.

关键词： ATP TLM Transformer Transients Windings

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