Pub Date : 2016-06-30DOI: 10.1109/ISFEE.2016.7803243
R. Aileni, C. Valderrama, S. Pasca, R. Strungaru
This paper presents the test of skin electrical conductance (SC) in function of temperature and body physiology. It is known that the skin presents electrodermal response and becomes a good conductor of electricity when an external or internal stimulus occurs. For measuring the skin moisture and temperature we used humidity and temperature smart sensors. The data acquisition system used, consist of sensors, signal conditioning circuitry and the analog to digital converter. For discretization of the continuous signal and lower power consumption we sampled the digital signal e after 30 seconds. We propose the sampling of the digital signals. For measuring the skin conductivity we applied a small voltage (0.5 V) across these electrodes. The experimental part is based on recording the values of the humidity and temperature change in function of the resistance variation. The correlation between these value is very important in medical analysis of diabetes for patients and medical staff and for studying the user comfort for cloths designed for sport area.
{"title":"Skin conductance analyzing in function of the bio-signals monitored by biomedical sensors","authors":"R. Aileni, C. Valderrama, S. Pasca, R. Strungaru","doi":"10.1109/ISFEE.2016.7803243","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803243","url":null,"abstract":"This paper presents the test of skin electrical conductance (SC) in function of temperature and body physiology. It is known that the skin presents electrodermal response and becomes a good conductor of electricity when an external or internal stimulus occurs. For measuring the skin moisture and temperature we used humidity and temperature smart sensors. The data acquisition system used, consist of sensors, signal conditioning circuitry and the analog to digital converter. For discretization of the continuous signal and lower power consumption we sampled the digital signal e after 30 seconds. We propose the sampling of the digital signals. For measuring the skin conductivity we applied a small voltage (0.5 V) across these electrodes. The experimental part is based on recording the values of the humidity and temperature change in function of the resistance variation. The correlation between these value is very important in medical analysis of diabetes for patients and medical staff and for studying the user comfort for cloths designed for sport area.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127737111","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 : 2016-06-19DOI: 10.1109/ISFEE.2016.7803226
A. Martone, K. Ranney, K. Sherbondy, K. Gallagher, Gregory J. Mazzaro, R. Narayanan
Harmonic radar is an exciting technology for the detection and ranging of nonlinear targets. The advantage of harmonic radar is that it can separate linear clutter from the harmonic target response. Possible disadvantages of harmonic radar include the need for highly sensitive receiver components, which can result in degraded performance in the presence of radio frequency interference (RFI). The authors have previously investigated multiple spectrum sensing techniques for harmonic radar. In this paper, an overview of these techniques are presented. These techniques mitigate the impact of RFI on harmonic radar performance, require a low computational complexity so that an up-to-date measure of the RFI is known, and are applicable to multiple radar types.
{"title":"An overview of spectrum sensing for harmonic radar","authors":"A. Martone, K. Ranney, K. Sherbondy, K. Gallagher, Gregory J. Mazzaro, R. Narayanan","doi":"10.1109/ISFEE.2016.7803226","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803226","url":null,"abstract":"Harmonic radar is an exciting technology for the detection and ranging of nonlinear targets. The advantage of harmonic radar is that it can separate linear clutter from the harmonic target response. Possible disadvantages of harmonic radar include the need for highly sensitive receiver components, which can result in degraded performance in the presence of radio frequency interference (RFI). The authors have previously investigated multiple spectrum sensing techniques for harmonic radar. In this paper, an overview of these techniques are presented. These techniques mitigate the impact of RFI on harmonic radar performance, require a low computational complexity so that an up-to-date measure of the RFI is known, and are applicable to multiple radar types.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126761886","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 : 2016-06-16DOI: 10.1109/ISFEE.2016.7803202
Baris Satar, A. Akbulut, Guven Yenihayat, Tolga Numaoglu, A. Yargicoglu, A. Yılmaz
Frequency assignment, as a subclass of general assignment problem, is a non-deterministic polynomial-time hard (NP-hard) optimization problem. Main difficulty in these types of problems is the time required to find an optimum solution, since the solution time increases exponentially as the size of the problem grows. To solve the problem in a limited computation time, meta-heuristic methods are adopted. In this study, a frequency assignment problem with conflicting objectives is described. This multi-objective optimization problem is reduced to a single objective one using a scalarization approach. Genetic Algorithm and Particle Swarm Optimization are used to find a solution to the problem. Comparisons of the performances of alternative methods are carried out for the identified problem. Results show that the proposed methods can get a solution which is quite acceptable in terms of interference levels.
{"title":"Solving the frequency assignment problem by using meta-heuristic methods","authors":"Baris Satar, A. Akbulut, Guven Yenihayat, Tolga Numaoglu, A. Yargicoglu, A. Yılmaz","doi":"10.1109/ISFEE.2016.7803202","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803202","url":null,"abstract":"Frequency assignment, as a subclass of general assignment problem, is a non-deterministic polynomial-time hard (NP-hard) optimization problem. Main difficulty in these types of problems is the time required to find an optimum solution, since the solution time increases exponentially as the size of the problem grows. To solve the problem in a limited computation time, meta-heuristic methods are adopted. In this study, a frequency assignment problem with conflicting objectives is described. This multi-objective optimization problem is reduced to a single objective one using a scalarization approach. Genetic Algorithm and Particle Swarm Optimization are used to find a solution to the problem. Comparisons of the performances of alternative methods are carried out for the identified problem. Results show that the proposed methods can get a solution which is quite acceptable in terms of interference levels.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132378606","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 : 2016-06-01DOI: 10.1109/ISFEE.2016.7803214
K. Pirapaharan, H. Kunsei, K. Senthilkumar, P. Hoole, S. Hoole
Multipath reflections are prevalent in underground mine wireless communication systems and are less constructive when an omnidirectional antenna is used. This phenomenon can be significantly controlled by eliminating the source of all multipaths with a single beam. The single beam must be rotatable towards the desired user to be of any use. The single directed beam will avoid generating multipath reflections and efficiently consume the valuable stored energy. In this paper we present an analysis of an array antenna using dipoles that forms a single beam without the need for reflectors or any complex arrangement of the array elements. It can be shown that dipole elements placed in a straight line are not effective in minimizing energy consumption and a minimum of three elements are sufficient for forming a single directed beam that is electronically rotatable to all directions. We have compared three, four and six elements for the accuracy. It is also shown that the elements of the array antenna should b placed on the circumference of a circle to avoid re-computation of weights to rotate the beam on to any desired direction, thus significantly reducing the computational burden of the single beam, steerable smart antenna.
{"title":"A single beam smart antenna for wireless communication in a highly reflective and narrow environment","authors":"K. Pirapaharan, H. Kunsei, K. Senthilkumar, P. Hoole, S. Hoole","doi":"10.1109/ISFEE.2016.7803214","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803214","url":null,"abstract":"Multipath reflections are prevalent in underground mine wireless communication systems and are less constructive when an omnidirectional antenna is used. This phenomenon can be significantly controlled by eliminating the source of all multipaths with a single beam. The single beam must be rotatable towards the desired user to be of any use. The single directed beam will avoid generating multipath reflections and efficiently consume the valuable stored energy. In this paper we present an analysis of an array antenna using dipoles that forms a single beam without the need for reflectors or any complex arrangement of the array elements. It can be shown that dipole elements placed in a straight line are not effective in minimizing energy consumption and a minimum of three elements are sufficient for forming a single directed beam that is electronically rotatable to all directions. We have compared three, four and six elements for the accuracy. It is also shown that the elements of the array antenna should b placed on the circumference of a circle to avoid re-computation of weights to rotate the beam on to any desired direction, thus significantly reducing the computational burden of the single beam, steerable smart antenna.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"261 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115594456","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 : 2016-06-01DOI: 10.1109/ISFEE.2016.7803184
B. Neagu, G. Grigoraș, Florina Scarlatache
Today, the electricity distribution networks supply a significant number of nonlinear consumers which causes a distorted and unbalanced state. A negative effect of these states is represented by the increase of power losses in the network elements. Even if the symmetrical sinusoidal state is initially considered for the power losses, in reality this often leads to power lines overloading, especially for the neutral. The existing method for power losses in distribution networks with distorted operating state is very difficult to use. The paper investigates the additional power losses for a real distribution network that operates in such a state. The aim is to present a reasonably accurate approach for evaluating the effects of harmonics on the power losses. In order to validate the proposed methodology, a study case for a real low voltage distribution network is provided, in which the additional power losses due to the distorted state are computed.
{"title":"The influence of harmonics on power losses in urban distribution networks","authors":"B. Neagu, G. Grigoraș, Florina Scarlatache","doi":"10.1109/ISFEE.2016.7803184","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803184","url":null,"abstract":"Today, the electricity distribution networks supply a significant number of nonlinear consumers which causes a distorted and unbalanced state. A negative effect of these states is represented by the increase of power losses in the network elements. Even if the symmetrical sinusoidal state is initially considered for the power losses, in reality this often leads to power lines overloading, especially for the neutral. The existing method for power losses in distribution networks with distorted operating state is very difficult to use. The paper investigates the additional power losses for a real distribution network that operates in such a state. The aim is to present a reasonably accurate approach for evaluating the effects of harmonics on the power losses. In order to validate the proposed methodology, a study case for a real low voltage distribution network is provided, in which the additional power losses due to the distorted state are computed.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132109470","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 : 2016-06-01DOI: 10.1109/ISFEE.2016.7803203
Y. Aslan, Y. E. Yağan
This study presents a fault location algorithm for medium voltage (MV) overhead power distribution lines based on artificial neural network (ANN). In the study the possibility of connection of a small scale remote-end source connection to the end of a radial distribution feeder has been considered. In the study, feed forward ANN with back propagation algorithm with Levenberg-Marquardt training function is used. The ANN inputs were formed by using frequency information of fault data which were obtained with digital filtering. The algorithm is extensively tested for a various system conditions for the faults created on the overhead distribution system which has been modeled with Matlab/Simulink software. From the results attained it is seen that the proposed technique has not been significantly affected from the connection of a small scale hydroelectric generator to the existing distribution system.
{"title":"ANN based fault location for medium voltage distribution lines with remote-end source","authors":"Y. Aslan, Y. E. Yağan","doi":"10.1109/ISFEE.2016.7803203","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803203","url":null,"abstract":"This study presents a fault location algorithm for medium voltage (MV) overhead power distribution lines based on artificial neural network (ANN). In the study the possibility of connection of a small scale remote-end source connection to the end of a radial distribution feeder has been considered. In the study, feed forward ANN with back propagation algorithm with Levenberg-Marquardt training function is used. The ANN inputs were formed by using frequency information of fault data which were obtained with digital filtering. The algorithm is extensively tested for a various system conditions for the faults created on the overhead distribution system which has been modeled with Matlab/Simulink software. From the results attained it is seen that the proposed technique has not been significantly affected from the connection of a small scale hydroelectric generator to the existing distribution system.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131713147","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 : 2016-06-01DOI: 10.1109/ISFEE.2016.7803183
G. Grigoraș, B. Neagu, Florina Scarlatache
The paper presents a fuzzy approach for evaluation of the power/energy losses in transformers from the electrical distribution networks considering three input variables: the loading factor, the voltage on low side, and the performance standard. These are modelled as linguistic variables and fuzzy numbers. The obtained results on a real distribution network have shown that the developed approach can be used as an alternative tool to estimate the power/energy losses in transformers in uncertainty conditions when there is few information about the network state and performance standard.
{"title":"Estimation of energy losses in distribution transformers using a fuzzy approach","authors":"G. Grigoraș, B. Neagu, Florina Scarlatache","doi":"10.1109/ISFEE.2016.7803183","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803183","url":null,"abstract":"The paper presents a fuzzy approach for evaluation of the power/energy losses in transformers from the electrical distribution networks considering three input variables: the loading factor, the voltage on low side, and the performance standard. These are modelled as linguistic variables and fuzzy numbers. The obtained results on a real distribution network have shown that the developed approach can be used as an alternative tool to estimate the power/energy losses in transformers in uncertainty conditions when there is few information about the network state and performance standard.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130961660","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 : 2016-06-01DOI: 10.1109/ISFEE.2016.7803221
E. Semyonov, A. Loschilov, N. Malyutin, V. Fedorov, S. Artishchev
A brief description of methods for the investigation of nonlinear transformations of ultra-wideband (UWB) signals at their impact on circuits is provided. The experimental setups implementing such methods for the investigation of nonlinearity microwave circuits nonlinearity characteristics under the action of UWB signals are described.
{"title":"Reflectometers and vector network analyzers for measuring nonlinear distortions of ultra-wideband and baseband pulse signals","authors":"E. Semyonov, A. Loschilov, N. Malyutin, V. Fedorov, S. Artishchev","doi":"10.1109/ISFEE.2016.7803221","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803221","url":null,"abstract":"A brief description of methods for the investigation of nonlinear transformations of ultra-wideband (UWB) signals at their impact on circuits is provided. The experimental setups implementing such methods for the investigation of nonlinearity microwave circuits nonlinearity characteristics under the action of UWB signals are described.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133441834","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 : 2016-06-01DOI: 10.1109/ISFEE.2016.7803160
C. Dumitrescu, M. Popescu
UPS transient response modeling, shows areas where the overall structure of the topology can be modified with the purpose of improvement given output electric characteristics. This paper focuses on the transient response of the UPS in certain situations. Most common situations presented are, the mains voltage drops when the sine wave goes through zero and when the sine wave goes through it's maximum peak. Simulations are presented and conclusions are explained given the analysis of the results.
{"title":"Characteristics of UPS transient response","authors":"C. Dumitrescu, M. Popescu","doi":"10.1109/ISFEE.2016.7803160","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803160","url":null,"abstract":"UPS transient response modeling, shows areas where the overall structure of the topology can be modified with the purpose of improvement given output electric characteristics. This paper focuses on the transient response of the UPS in certain situations. Most common situations presented are, the mains voltage drops when the sine wave goes through zero and when the sine wave goes through it's maximum peak. Simulations are presented and conclusions are explained given the analysis of the results.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125775324","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 : 2016-06-01DOI: 10.1109/ISFEE.2016.7803157
Alexandru Buturugă, D. Stoichescu, R. Constantinescu
This paper presents a universal control system that can be used for control of small tasks. In general the electronic automated systems are designed by specialized engineers and are dedicated to each task they have to automate. This paper presents the concept of a universal control system for automation of small tasks. The system has two device types, a master device and multiple slave devices. The master device is able to communicate to slave devices that are able to monitor and control specific tasks. The system can be configured via a Windows application using text input.
{"title":"Universal system for automation of small tasks","authors":"Alexandru Buturugă, D. Stoichescu, R. Constantinescu","doi":"10.1109/ISFEE.2016.7803157","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803157","url":null,"abstract":"This paper presents a universal control system that can be used for control of small tasks. In general the electronic automated systems are designed by specialized engineers and are dedicated to each task they have to automate. This paper presents the concept of a universal control system for automation of small tasks. The system has two device types, a master device and multiple slave devices. The master device is able to communicate to slave devices that are able to monitor and control specific tasks. The system can be configured via a Windows application using text input.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121315450","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}
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