Pub Date : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512095
A. Peniak, J. Makarovic, P. Rafajdus
The main purpose of this paper is replacement of an existing DC motor by an optimized Switched Reluctance Motor (SRM) for an automotive application, especially for a first Slovak electric car. The SRM was optimized on the base a new optimization procedure, where input parameters were based on requirements for this vehicle e.g. maximum torque, acceleration and power at different speeds. The optimized motor was constructed and the static nonlinear and dynamic performances and parameters were measured and compared with the calculated ones.
{"title":"Replacing of DC motor in the first Slovak electric car by an optimized switched reluctance motor","authors":"A. Peniak, J. Makarovic, P. Rafajdus","doi":"10.1109/ELEKTRO.2016.7512095","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512095","url":null,"abstract":"The main purpose of this paper is replacement of an existing DC motor by an optimized Switched Reluctance Motor (SRM) for an automotive application, especially for a first Slovak electric car. The SRM was optimized on the base a new optimization procedure, where input parameters were based on requirements for this vehicle e.g. maximum torque, acceleration and power at different speeds. The optimized motor was constructed and the static nonlinear and dynamic performances and parameters were measured and compared with the calculated ones.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123434585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512025
Toyohiko Hayashi
I have been working as a biomedical and biomechanical engineer in interdisciplinary fields of science in order to better solve urgent problems. In this paper, I'd like to demonstrate research and develop of several products made in collaboration with private sectors. I classified such collaborative approaches into three different categories as follows: 1) university seeds-based type, 2) company needs-based type, and 3) joint development type. As examples of products belonging to categories 1, 2 and 3, a photoelectric measurement system of 6-DOF jaw movements, TRIMETR JKN/1 (Tokyo Shizaisha Inc.), evaluation of swallowing motion of beer (Sapporo Breweries Inc.) and a web-based management and customizing support system of versatile communication aid for persons with communication disorders, VCAN/2, under development with Ginz ado-Net Inc. were demonstrated, respectively.
{"title":"Research and development in collaboration with private sectors: Applications of electronics and computer technology in the fields of medical science, ergonomics and assistive technology","authors":"Toyohiko Hayashi","doi":"10.1109/ELEKTRO.2016.7512025","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512025","url":null,"abstract":"I have been working as a biomedical and biomechanical engineer in interdisciplinary fields of science in order to better solve urgent problems. In this paper, I'd like to demonstrate research and develop of several products made in collaboration with private sectors. I classified such collaborative approaches into three different categories as follows: 1) university seeds-based type, 2) company needs-based type, and 3) joint development type. As examples of products belonging to categories 1, 2 and 3, a photoelectric measurement system of 6-DOF jaw movements, TRIMETR JKN/1 (Tokyo Shizaisha Inc.), evaluation of swallowing motion of beer (Sapporo Breweries Inc.) and a web-based management and customizing support system of versatile communication aid for persons with communication disorders, VCAN/2, under development with Ginz ado-Net Inc. were demonstrated, respectively.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114481998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512132
P. Karban, D. Pánek, P. Kropík
Comparison of open-source libraries for solving systems of algebraic equations is carried out. Attention is paid mainly to solvers (or preconditioners) using the method called algebraic multigrid. For comparison, several direct and iterative solvers were chosen, such as MUMPS, UMFPACK, TRILINOS, PARALUTION and PETSc. Utilization of these packages is shown on two examples.
{"title":"Utilization of algebraic multigrid for solving electromagnetic field by HP-FEM","authors":"P. Karban, D. Pánek, P. Kropík","doi":"10.1109/ELEKTRO.2016.7512132","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512132","url":null,"abstract":"Comparison of open-source libraries for solving systems of algebraic equations is carried out. Attention is paid mainly to solvers (or preconditioners) using the method called algebraic multigrid. For comparison, several direct and iterative solvers were chosen, such as MUMPS, UMFPACK, TRILINOS, PARALUTION and PETSc. Utilization of these packages is shown on two examples.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129938229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512158
P. Trnka, V. Mentlík, J. Hornak, A. Čejková, P. Totzauer
Natural esters are candidate fluids for transformer insulation system. Recently the most common insulation system in power transformers is paper-oil system. Oil generally mean petroleum based insulating fluid. As there are efforts to preserve sustainable development, crude oil products should be eliminated and replaced by natural products, which are easily biodegradable. In past it was shown that natural esters may reach qualities of mineral oils in some parameters (from electrical parameters it is typically electric strength), while they remain worse in others (typically dissipation factor). Although there are some difficulties, by proper design they should be eliminated. The paper concentrates on specific aspects of designing insulation elements by preserving the same lifetime as in case of mineral oils.
{"title":"Natural esters as insulating fluids — Some other features","authors":"P. Trnka, V. Mentlík, J. Hornak, A. Čejková, P. Totzauer","doi":"10.1109/ELEKTRO.2016.7512158","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512158","url":null,"abstract":"Natural esters are candidate fluids for transformer insulation system. Recently the most common insulation system in power transformers is paper-oil system. Oil generally mean petroleum based insulating fluid. As there are efforts to preserve sustainable development, crude oil products should be eliminated and replaced by natural products, which are easily biodegradable. In past it was shown that natural esters may reach qualities of mineral oils in some parameters (from electrical parameters it is typically electric strength), while they remain worse in others (typically dissipation factor). Although there are some difficulties, by proper design they should be eliminated. The paper concentrates on specific aspects of designing insulation elements by preserving the same lifetime as in case of mineral oils.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121269924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512045
Lukas Wezranovski, Zdeněk Urban, L. Ivanek, Yahia A. Zakaria
This paper deals with the different kinds of optimization. Especially, it uses COMSOL Multiphysics software and its subsequent utilization at the patch antenna. The article deals with optimization of basic dimensions the patch antenna depending on the parameter S11 and the field strength at a defined point. This feature is very important, because it helps determine whether the antenna is properly built or modelled. From this reason, it helps save time and resources of development teams.
{"title":"Patch antenna optimization in COMSOL multiphysics","authors":"Lukas Wezranovski, Zdeněk Urban, L. Ivanek, Yahia A. Zakaria","doi":"10.1109/ELEKTRO.2016.7512045","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512045","url":null,"abstract":"This paper deals with the different kinds of optimization. Especially, it uses COMSOL Multiphysics software and its subsequent utilization at the patch antenna. The article deals with optimization of basic dimensions the patch antenna depending on the parameter S11 and the field strength at a defined point. This feature is very important, because it helps determine whether the antenna is properly built or modelled. From this reason, it helps save time and resources of development teams.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"120 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114087286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512087
D. Kaprál, P. Braciník, M. Roch
The paper deals with a data measurement at secondary distribution substations as a toll supporting more sophisticated control of medium and low voltage networks. It presents the structure of already installed measuring system as well as the way how the measured data can help to improve distribution system management, especially a voltage control. The application of such systems can enable the bigger and harmless use of RESs connected to a distribution power system.
{"title":"Measurement and processing data from smart metering systems","authors":"D. Kaprál, P. Braciník, M. Roch","doi":"10.1109/ELEKTRO.2016.7512087","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512087","url":null,"abstract":"The paper deals with a data measurement at secondary distribution substations as a toll supporting more sophisticated control of medium and low voltage networks. It presents the structure of already installed measuring system as well as the way how the measured data can help to improve distribution system management, especially a voltage control. The application of such systems can enable the bigger and harmless use of RESs connected to a distribution power system.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124090268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512155
L. Ladanyi, L. Scholtz, Jarmila Mulerova
Due to the increasing demands for higher channel bitrate continuous pulse shortening is under research. The main goal of this paper is to describe and simulate effects of dispersion and nonlinear phenomena on ultra-short optical pulses propagating through optical fibers. The paper shows that the effect of dispersion causes a frequency shift which can be compensated by self-phase modulation. On the other hand our results prove that effects caused by high-order nonlinearities can be compensated as a result of the third order dispersion which is demonstrated in case of forming the solitary waves.
{"title":"Numerical simulations of the propagation of ultra-short Gaussian pulses in optical fibers with high-order nonlinearities","authors":"L. Ladanyi, L. Scholtz, Jarmila Mulerova","doi":"10.1109/ELEKTRO.2016.7512155","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512155","url":null,"abstract":"Due to the increasing demands for higher channel bitrate continuous pulse shortening is under research. The main goal of this paper is to describe and simulate effects of dispersion and nonlinear phenomena on ultra-short optical pulses propagating through optical fibers. The paper shows that the effect of dispersion causes a frequency shift which can be compensated by self-phase modulation. On the other hand our results prove that effects caused by high-order nonlinearities can be compensated as a result of the third order dispersion which is demonstrated in case of forming the solitary waves.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126491020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512085
Ramesh Guguloth, T. S. Sunil Kumar
In restructured electricity markets, an effective transmission pricing method is required to address transmission issues and to generate correct economic signals. Transmission line constraints can result in variations in energy prices throughout the network. These prices depend on generator bids, load levels, and transmission network limitations. A congestion charge is incurred when the system is constrained by physical limits. Locational marginal pricing (LMP) has become a popular method in restructured power markets to address the congestion price. This paper presents, LMP calculations at each bus when system working under normal and congested condition, and the congested system has been relieved by optimal placement of TCSC and DG unit. The optimal placement of TCSC and DG unit are suggested by real power flow and transmission line relief (TLR) sensitivity indexes. Optimal power flow based congestion management (OPF based CM) problem is employed to minimize the cost, calculate LMP's and relieve network congestion in the systems. Were the OPF based CM problem solutions have been obtained by Primal Linear Programming (PLP) and Genetic Algorithm (GA), the developed models have been applied for 26 bus power system network. The comparison is made between PLP and GA OPF CM problem solutions, where the solution by the GA method gave better economic results.
在重构的电力市场中，需要一种有效的输电定价方法来解决输电问题并产生正确的经济信号。输电线路的限制会导致整个电网能源价格的变化。这些价格取决于发电机的出价、负荷水平和输电网络的限制。当系统受到物理限制时，就会产生拥塞费。区位边际定价(LMP)已成为重构电力市场中解决拥堵电价问题的常用方法。本文给出了系统在正常和拥塞状态下各母线的LMP计算，并通过TCSC和DG机组的优化配置缓解了系统的拥塞。根据实际潮流和输电线路救济(TLR)灵敏度指标，提出了TCSC和DG机组的最佳配置方案。采用基于最优潮流的拥塞管理(OPF based CM)问题来最小化成本，计算LMP，缓解系统中的网络拥塞。利用原始线性规划(PLP)和遗传算法(GA)求解了基于OPF的CM问题，并将所建立的模型应用于26个母线电网。比较了PLP和遗传算法求解OPF CM问题的结果，发现遗传算法的求解具有更好的经济效果。
{"title":"LMP calculation and OPF based congestion management in deregulated power systems","authors":"Ramesh Guguloth, T. S. Sunil Kumar","doi":"10.1109/ELEKTRO.2016.7512085","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512085","url":null,"abstract":"In restructured electricity markets, an effective transmission pricing method is required to address transmission issues and to generate correct economic signals. Transmission line constraints can result in variations in energy prices throughout the network. These prices depend on generator bids, load levels, and transmission network limitations. A congestion charge is incurred when the system is constrained by physical limits. Locational marginal pricing (LMP) has become a popular method in restructured power markets to address the congestion price. This paper presents, LMP calculations at each bus when system working under normal and congested condition, and the congested system has been relieved by optimal placement of TCSC and DG unit. The optimal placement of TCSC and DG unit are suggested by real power flow and transmission line relief (TLR) sensitivity indexes. Optimal power flow based congestion management (OPF based CM) problem is employed to minimize the cost, calculate LMP's and relieve network congestion in the systems. Were the OPF based CM problem solutions have been obtained by Primal Linear Programming (PLP) and Genetic Algorithm (GA), the developed models have been applied for 26 bus power system network. The comparison is made between PLP and GA OPF CM problem solutions, where the solution by the GA method gave better economic results.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121760474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512107
J. Durech, M. Franeková, P. Luley, E. Bubeníková
The authors deals with the problem of secure analysis of C2C communications within Cooperative - Intelligent Transportation Systems (C-ITS). In paper PKI (Public Key Infrastructure) on the base of ECDSA (Elliptic Curve Digital Signature Algorithm) for several EC (Elliptic Curves) types is proposed. The experimental part is focused on secure analysis of the worst case scenario of C2C communications for four-lane intersection (with 800 cars), which model was realized via OPNET Modeler with applying OpenSSL libraries. From obtained results the influence of used elliptic curve within message authentication and size of transmitted message to performance of the VANET network was analyzed.
{"title":"Safety aspects of PKI architecture within C-ITS and their modelling","authors":"J. Durech, M. Franeková, P. Luley, E. Bubeníková","doi":"10.1109/ELEKTRO.2016.7512107","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512107","url":null,"abstract":"The authors deals with the problem of secure analysis of C2C communications within Cooperative - Intelligent Transportation Systems (C-ITS). In paper PKI (Public Key Infrastructure) on the base of ECDSA (Elliptic Curve Digital Signature Algorithm) for several EC (Elliptic Curves) types is proposed. The experimental part is focused on secure analysis of the worst case scenario of C2C communications for four-lane intersection (with 800 cars), which model was realized via OPNET Modeler with applying OpenSSL libraries. From obtained results the influence of used elliptic curve within message authentication and size of transmitted message to performance of the VANET network was analyzed.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130079984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-05-16DOI: 10.1109/ELEKTRO.2016.7512028
J. Tiili
Finnish educational model in higher education has a dual model, consisting of academic universities and more professionally oriented universities of applied sciences (UAS). Students entering UAS's are very heterogeneous what comes to their scientific and mathematical skills. The key to enhance learning outcomes is reported to be the active engagement of the students. In Tampere UAS, a method to study engineering physics has been improved based on good practices from literature. The idea of the method is to push routine-like elements in online environment, mainly with video-clips distributed via YouTube, and to use the valuable lecturing time to activate the students to study. The similar idea is also used in online courses. In this way the routine-like parts of teaching is always available to help the students. Assessment was also changed. The research done in parallel with implementation of the new method suggest that students' activity is closely connected to the periods of assessment. By spreading the assessment throughout the course, students' activity increases and spreads more evenly on the whole course. Small scale research done with individual students' activity shows that the students who fail to pass the course are much less active on their studying than those who pass. The new method has also had a good response from the students.
{"title":"Using E-leaming to activate freshmen: Challenges and experiences","authors":"J. Tiili","doi":"10.1109/ELEKTRO.2016.7512028","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2016.7512028","url":null,"abstract":"Finnish educational model in higher education has a dual model, consisting of academic universities and more professionally oriented universities of applied sciences (UAS). Students entering UAS's are very heterogeneous what comes to their scientific and mathematical skills. The key to enhance learning outcomes is reported to be the active engagement of the students. In Tampere UAS, a method to study engineering physics has been improved based on good practices from literature. The idea of the method is to push routine-like elements in online environment, mainly with video-clips distributed via YouTube, and to use the valuable lecturing time to activate the students to study. The similar idea is also used in online courses. In this way the routine-like parts of teaching is always available to help the students. Assessment was also changed. The research done in parallel with implementation of the new method suggest that students' activity is closely connected to the periods of assessment. By spreading the assessment throughout the course, students' activity increases and spreads more evenly on the whole course. Small scale research done with individual students' activity shows that the students who fail to pass the course are much less active on their studying than those who pass. The new method has also had a good response from the students.","PeriodicalId":369251,"journal":{"name":"2016 ELEKTRO","volume":"660 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117315994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：