Pub Date : 2016-06-01DOI: 10.1109/ISFEE.2016.7803175
S. Can, A. Yılmaz
In this study; a single negative textile-based metamaterial has been proposed for Industrial, Scientific and Medical (ISM) band applications. A tunable ε-negative region is obtained at 4.8GHz having a bandwidth value of almost 0.8GHz. A finite array is proposed that mimics the unit cell accurately and the scattering parameters of the array compared with the unit cell. In addition to that the parametric analyses of the unit cell is also performed. Parameter retrieval analysis, which uses a version of the Nicholson-Ross-Weir (NRW) algorithm that is improved by implementing the Kramers-Kronig relationship, is performed by using the magnitude and phase values, which are obtained via CST Microwave Studio. Proposed planer textile structure bended on a sphere having a radius of r and the corresponding scattering characteristic has been evaluated.
{"title":"Conformal textile-based single negative metamaterials for ISM-band applications","authors":"S. Can, A. Yılmaz","doi":"10.1109/ISFEE.2016.7803175","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803175","url":null,"abstract":"In this study; a single negative textile-based metamaterial has been proposed for Industrial, Scientific and Medical (ISM) band applications. A tunable ε-negative region is obtained at 4.8GHz having a bandwidth value of almost 0.8GHz. A finite array is proposed that mimics the unit cell accurately and the scattering parameters of the array compared with the unit cell. In addition to that the parametric analyses of the unit cell is also performed. Parameter retrieval analysis, which uses a version of the Nicholson-Ross-Weir (NRW) algorithm that is improved by implementing the Kramers-Kronig relationship, is performed by using the magnitude and phase values, which are obtained via CST Microwave Studio. Proposed planer textile structure bended on a sphere having a radius of r and the corresponding scattering characteristic has been evaluated.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"57 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":"133561365","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.2016.7803204
O. T. Altinoz, A. Yılmaz
Achievement scalarization function is one of the method for converting the multiobjective problem into a single objective one. The differences of this methodology among the similar scalarization approaches are its performance and utilization of the reference point set on objective space which is preferred on modern (especially many objective problems) optimization algorithms. Since it is possible to use various optimization algorithms with this scalarization method, in this study a classical (also well-known and relatively complicated) optimization algorithm as a part of nonlinear programming called sequential quadratic programming is preferred. The analysis initially is started by applying this method into two benchmark problems to show the performance of this scalarization function on convex and concave problems and then the idea is applied to optimize the patch antenna problem as a multiobjective real-world optimization problem. The results show that not only the satisfactory performance obtained from classical optimization algorithm but also the method allows the researchers to select different levels of the substrate thickness of the patch antenna which is a critical issue for joining the simulation results into implementation phase.
{"title":"Multiobjective patch antenna design by using achievement scalarization function with nonlinear programming algorithm","authors":"O. T. Altinoz, A. Yılmaz","doi":"10.1109/ISFEE.2016.7803204","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803204","url":null,"abstract":"Achievement scalarization function is one of the method for converting the multiobjective problem into a single objective one. The differences of this methodology among the similar scalarization approaches are its performance and utilization of the reference point set on objective space which is preferred on modern (especially many objective problems) optimization algorithms. Since it is possible to use various optimization algorithms with this scalarization method, in this study a classical (also well-known and relatively complicated) optimization algorithm as a part of nonlinear programming called sequential quadratic programming is preferred. The analysis initially is started by applying this method into two benchmark problems to show the performance of this scalarization function on convex and concave problems and then the idea is applied to optimize the patch antenna problem as a multiobjective real-world optimization problem. The results show that not only the satisfactory performance obtained from classical optimization algorithm but also the method allows the researchers to select different levels of the substrate thickness of the patch antenna which is a critical issue for joining the simulation results into implementation phase.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"102 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":"134414912","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.2016.7803186
A. Aydoğan, F. Akleman
An approximation is derived for longitudinally inhomogeneous waveguides (LIW). Total reflections are adopted for a rough approximation through the tracking of the main reflected and transmitted fields in the multilayered dielectric structure. This approximation can be used to determine the thickness of layers of which the dielectric properties are known. Although the obtained thickness values are a rough approximation for the exact values, they provide a utility for iterative optimization algorithms for which the initial values are vital.
{"title":"An approximation for direct and inverse problems related to longitudinally inhomogeneous waveguides","authors":"A. Aydoğan, F. Akleman","doi":"10.1109/ISFEE.2016.7803186","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803186","url":null,"abstract":"An approximation is derived for longitudinally inhomogeneous waveguides (LIW). Total reflections are adopted for a rough approximation through the tracking of the main reflected and transmitted fields in the multilayered dielectric structure. This approximation can be used to determine the thickness of layers of which the dielectric properties are known. Although the obtained thickness values are a rough approximation for the exact values, they provide a utility for iterative optimization algorithms for which the initial values are vital.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"99 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":"134040923","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.2016.7803169
Yalcin Dogrul, Y. Aslan
The present study was conducted using static reactive power compensator (SVC), and fixed capacity-thyristor controlled reactor (FC-TCR). In the study, PID (Proportional-Integral-Derivate) parameters were adjusted to self-adjusting mode via fuzzy logic (FL) applications of Fuzzy-PID algorithm with triangle, trapezoid membership functions (Model 1) and Fuzzy-PID algorithm with gauss and sigmoid membership functions (Model 2). The performance of two models with different membership functions was compared. The compensator was controlled with programmable logic controller (PLC). Additionally, the system was monitored and controlled during the whole process with SCADA (Supervisory Control and Data Acquisition) system.
本研究采用静态无功补偿器(SVC)和固定容量晶闸管控制电抗器(FC-TCR)进行。本研究通过模糊逻辑(FL)将具有三角形、梯形隶属函数的fuzzy -PID算法(模型1)和具有高斯、s型隶属函数的fuzzy -PID算法(模型2)调整到自调整模式，比较了具有不同隶属函数的两种模型的性能。补偿器采用可编程控制器(PLC)控制。此外，采用SCADA (Supervisory Control and Data Acquisition)系统对整个过程进行监控。
{"title":"Comparison of Fuzzy-PID controlled single phase static reactive power compensator with different membership functions","authors":"Yalcin Dogrul, Y. Aslan","doi":"10.1109/ISFEE.2016.7803169","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803169","url":null,"abstract":"The present study was conducted using static reactive power compensator (SVC), and fixed capacity-thyristor controlled reactor (FC-TCR). In the study, PID (Proportional-Integral-Derivate) parameters were adjusted to self-adjusting mode via fuzzy logic (FL) applications of Fuzzy-PID algorithm with triangle, trapezoid membership functions (Model 1) and Fuzzy-PID algorithm with gauss and sigmoid membership functions (Model 2). The performance of two models with different membership functions was compared. The compensator was controlled with programmable logic controller (PLC). Additionally, the system was monitored and controlled during the whole process with SCADA (Supervisory Control and Data Acquisition) system.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"29 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":"133515070","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.2016.7803207
R. Radescu
This paper presents a methodology for creating dynamic web applications for archaeological management systems with applications in architecture and restoration. The dynamic nature of the application consists in the use of new technologies at partial loading the web page elements. Search results are displayed in real time and lists are populated with existing items in the database when queries are applied. The purpose of this web application is to allow viewing items and targets in a complex database management system of an archaeological site corresponding to it. The application aims at introducing, modifying or deleting the items (buildings) through pages accessible only to limited categories of users (managed by an administrator), thus simplifying the process of counting and specific input data sorting by a computer-aided process.
{"title":"Conceiving, designing and implementing a dynamic web application for an architecture and restoration online management system","authors":"R. Radescu","doi":"10.1109/ISFEE.2016.7803207","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803207","url":null,"abstract":"This paper presents a methodology for creating dynamic web applications for archaeological management systems with applications in architecture and restoration. The dynamic nature of the application consists in the use of new technologies at partial loading the web page elements. Search results are displayed in real time and lists are populated with existing items in the database when queries are applied. The purpose of this web application is to allow viewing items and targets in a complex database management system of an archaeological site corresponding to it. The application aims at introducing, modifying or deleting the items (buildings) through pages accessible only to limited categories of users (managed by an administrator), thus simplifying the process of counting and specific input data sorting by a computer-aided process.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"40 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":"122191836","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.2016.7803162
Natthorn Chuayphan, B. Srisuchinwong
A new algebraically simple five-minimum-term approach to an existing FDNR-based chaotic circuit is presented. An existing piecewise-linear model of a diode is replaced with a new better model using a conventional diode equation. Such a new model results in algebraically simple five minimum terms in three coupled ordinary differential equations (ODEs). Not only are the ODEs reduced from six to five minimum algebraic terms, but also from two nonlinear terms to a single nonlinear term. Better versions of chaotic attractors, a new bifurcation diagram and a new largest Lyapunov exponent are depicted. In particular, a new homoclinic orbit of the circuit is illustrated.
{"title":"A new algebraically simple five-minimum-term approach to an existing FDNR-based chaotic circuit and its new homoclinic orbit","authors":"Natthorn Chuayphan, B. Srisuchinwong","doi":"10.1109/ISFEE.2016.7803162","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803162","url":null,"abstract":"A new algebraically simple five-minimum-term approach to an existing FDNR-based chaotic circuit is presented. An existing piecewise-linear model of a diode is replaced with a new better model using a conventional diode equation. Such a new model results in algebraically simple five minimum terms in three coupled ordinary differential equations (ODEs). Not only are the ODEs reduced from six to five minimum algebraic terms, but also from two nonlinear terms to a single nonlinear term. Better versions of chaotic attractors, a new bifurcation diagram and a new largest Lyapunov exponent are depicted. In particular, a new homoclinic orbit of the circuit is illustrated.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"57 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":"124815612","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.2016.7803235
Č. V. Atanasiu, L. Zakharov, K. Lackner, M. Hoelzl, E. Strumberger, S. Nicolici
During plasma disruptions in tokamaks, electric currents are excited in the three-dimensional vessel structures by a plasma Wall Touching Kink Mode (WTKM). These modes are frequently excited during a Vertical Displacement Event (VDE) and cause big sideways forces on the vacuum vessel which are difficult to confront. To understand the plasma disruptions in tokamaks and to predict their effects, realistic simulations of these electric currents are required. In the present paper a flat triangle Finite Element (FE) representation of these surface currents excited in a thin conducting wall of arbitrary three-dimensional geometry is described. Our wall model covers both eddy currents, excited inductively, and source/sink currents due to current sharing between the plasma and the wall.
{"title":"Simulation of surface currents excited by plasma Wall-Touching Kink and vertical modes in tokamak","authors":"Č. V. Atanasiu, L. Zakharov, K. Lackner, M. Hoelzl, E. Strumberger, S. Nicolici","doi":"10.1109/ISFEE.2016.7803235","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803235","url":null,"abstract":"During plasma disruptions in tokamaks, electric currents are excited in the three-dimensional vessel structures by a plasma Wall Touching Kink Mode (WTKM). These modes are frequently excited during a Vertical Displacement Event (VDE) and cause big sideways forces on the vacuum vessel which are difficult to confront. To understand the plasma disruptions in tokamaks and to predict their effects, realistic simulations of these electric currents are required. In the present paper a flat triangle Finite Element (FE) representation of these surface currents excited in a thin conducting wall of arbitrary three-dimensional geometry is described. Our wall model covers both eddy currents, excited inductively, and source/sink currents due to current sharing between the plasma and the wall.","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":"124937400","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.2016.7803195
Cristina Pitorac
The calculation of the battery power losses is very important for its operation in safe conditions. Determining the power losses will be important for choosing the cooling system of the battery and so, keeping the accumulator in the optimal range of temperatures, increasing also the lifetime, which reflects itself in price reduction.
{"title":"Estimation of the power losses of a li-ion battery by operation in an electric vehicle","authors":"Cristina Pitorac","doi":"10.1109/ISFEE.2016.7803195","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803195","url":null,"abstract":"The calculation of the battery power losses is very important for its operation in safe conditions. Determining the power losses will be important for choosing the cooling system of the battery and so, keeping the accumulator in the optimal range of temperatures, increasing also the lifetime, which reflects itself in price reduction.","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"52 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":"126146816","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.2016.7803155
Marouane El Azzaoui, H. Mahmoudi, B. Bossoufi, Madiha El Ghamrasni
This paper discusses a wind conversion chain based on a doubly fed induction generator. First, we will present the different components of the wind turbine system, aerodynamic, mechanical and electrical models will be treated. In a second step we will study how to make a physical simulator wind turbine with a DC motor, then, we present the modeling of the doubly fed induction generator (DFIG). The entire wind energy conversion chain (DC motor emulation of the mechanical part and DFIG) will then be validated by simulation for two operating point of our wind turbine, one below the synchronous speed (sub-synchronous mode) and one above (hyper-synchronous mode).
{"title":"Emulation of wind conversion chain equipped with a doubly fed induction generator","authors":"Marouane El Azzaoui, H. Mahmoudi, B. Bossoufi, Madiha El Ghamrasni","doi":"10.1109/ISFEE.2016.7803155","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803155","url":null,"abstract":"This paper discusses a wind conversion chain based on a doubly fed induction generator. First, we will present the different components of the wind turbine system, aerodynamic, mechanical and electrical models will be treated. In a second step we will study how to make a physical simulator wind turbine with a DC motor, then, we present the modeling of the doubly fed induction generator (DFIG). The entire wind energy conversion chain (DC motor emulation of the mechanical part and DFIG) will then be validated by simulation for two operating point of our wind turbine, one below the synchronous speed (sub-synchronous mode) and one above (hyper-synchronous mode).","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"16 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":"130373204","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.2016.7803242
R. Aileni, L. Dincă, S. Pasca, R. Strungaru
Wearable electronic devices involve the integration of the electronic devices - smart sensors on flat textile structures. The wearable electronics used for physiological monitoring could help in diagnosis or ongoing treatment of patients with cardiovascular diseases, neurological diseases or with diabetes. The wearable electronics for medical monitoring should be comfortable for the patient and have a design concept for 3D garment products which allow a high portability in the textile flexible structures. For a wearable textile electronic device is important to study the influence of the body temperature for yarn electrical conductivity. The resistivity and electrical resistance for textile materials (yarns, flat textiles - woven, nonwoven or knitted) are important when the conductive textile structures are used to connect sensors or actuators. The textile materials used as support for electronics wearable devices must be also safe for humans and not cause an electrostatic discharge. This paper describes the behavior of the conductive yarn, based on Ag coating, in textile knitted structure by using sewing process. The work presents the conductive yarns parameters variation when the yarn integrated in textile structure is extended. In this work the Energy Dispersive X-ray analysis (EDAX) was used in order to analyze the chemical elements present in the conductive fiber from yarn structure used. This work proposes the using of conductive yarns for breathing belt monitoring, based on conductive filamentary yarn resistance modification in inspiration and expiration phases [1].
{"title":"Flexible structures with electro-conductive properties for wearable electronic devices","authors":"R. Aileni, L. Dincă, S. Pasca, R. Strungaru","doi":"10.1109/ISFEE.2016.7803242","DOIUrl":"https://doi.org/10.1109/ISFEE.2016.7803242","url":null,"abstract":"Wearable electronic devices involve the integration of the electronic devices - smart sensors on flat textile structures. The wearable electronics used for physiological monitoring could help in diagnosis or ongoing treatment of patients with cardiovascular diseases, neurological diseases or with diabetes. The wearable electronics for medical monitoring should be comfortable for the patient and have a design concept for 3D garment products which allow a high portability in the textile flexible structures. For a wearable textile electronic device is important to study the influence of the body temperature for yarn electrical conductivity. The resistivity and electrical resistance for textile materials (yarns, flat textiles - woven, nonwoven or knitted) are important when the conductive textile structures are used to connect sensors or actuators. The textile materials used as support for electronics wearable devices must be also safe for humans and not cause an electrostatic discharge. This paper describes the behavior of the conductive yarn, based on Ag coating, in textile knitted structure by using sewing process. The work presents the conductive yarns parameters variation when the yarn integrated in textile structure is extended. In this work the Energy Dispersive X-ray analysis (EDAX) was used in order to analyze the chemical elements present in the conductive fiber from yarn structure used. This work proposes the using of conductive yarns for breathing belt monitoring, based on conductive filamentary yarn resistance modification in inspiration and expiration phases [1].","PeriodicalId":240170,"journal":{"name":"2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE)","volume":"16 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":"127992115","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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