Pub Date : 2012-05-21DOI: 10.1109/ELEKTRO.2012.6225691
I. Asenova, F. Balik
A new method of the multiparameter symbolic sensitivity determination based on the equivalent nullor model of active devices and modified Coates flow graph is presented. The proposed method is simple and performs the multiparameter symbolic sensitivity analysis of a synthesized network with respect to various circuit parameters. A special software tool called “HoneySen” has been developed to implement the suggested method. All partial transfer functions and partial sensitivities can be determined, too. Symbolic results for the multiparameter sensitivity of the voltage transfer function for a fourth-order low pass filter is presented. Comparison of the presented method with the Transimpedance method is performed.
{"title":"Multiparameter symbolic sensitivity analysis of active circuits by using nullor model and modified Coates flow graph","authors":"I. Asenova, F. Balik","doi":"10.1109/ELEKTRO.2012.6225691","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225691","url":null,"abstract":"A new method of the multiparameter symbolic sensitivity determination based on the equivalent nullor model of active devices and modified Coates flow graph is presented. The proposed method is simple and performs the multiparameter symbolic sensitivity analysis of a synthesized network with respect to various circuit parameters. A special software tool called “HoneySen” has been developed to implement the suggested method. All partial transfer functions and partial sensitivities can be determined, too. Symbolic results for the multiparameter sensitivity of the voltage transfer function for a fourth-order low pass filter is presented. Comparison of the presented method with the Transimpedance method is performed.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115007005","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 : 2012-05-21DOI: 10.1109/ELEKTRO.2012.6225584
O. Hock, P. Drgona
This paper deals with the design and simulation of PWM modulator with increased reliability implemented in FPGA circuit Spartan-3A DSP-1800th. The proposal and design has been made in the simulation program ISE from Xilinx. Quantification of the reliability of single, double and three - module system is also discussed in paper.
{"title":"PWM modulator with increased reliability in FPGA circuit","authors":"O. Hock, P. Drgona","doi":"10.1109/ELEKTRO.2012.6225584","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225584","url":null,"abstract":"This paper deals with the design and simulation of PWM modulator with increased reliability implemented in FPGA circuit Spartan-3A DSP-1800th. The proposal and design has been made in the simulation program ISE from Xilinx. Quantification of the reliability of single, double and three - module system is also discussed in paper.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115168971","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 : 2012-05-21DOI: 10.1109/ELEKTRO.2012.6225660
V. Matkova, T. Strapacova
New industrial Non Destructive Testing (NDT) requires the development of new probes because the use of inductance coil sensors are limited for low frequency application such as for detection of deep buried cracks and defect on the edge of the specimen. This paper deals with magnetic sensors (giant magnetoresistance - GMR and fluxgate sensors). The comparison of selected sensors, their properties and application in nondestructive testing are presented in this article.
{"title":"Detection sensors for electromagnetic nondestructive evaluation","authors":"V. Matkova, T. Strapacova","doi":"10.1109/ELEKTRO.2012.6225660","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225660","url":null,"abstract":"New industrial Non Destructive Testing (NDT) requires the development of new probes because the use of inductance coil sensors are limited for low frequency application such as for detection of deep buried cracks and defect on the edge of the specimen. This paper deals with magnetic sensors (giant magnetoresistance - GMR and fluxgate sensors). The comparison of selected sensors, their properties and application in nondestructive testing are presented in this article.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121809533","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 : 2012-05-21DOI: 10.1109/ELEKTRO.2012.6225655
M. Gregor, J. Spalek, J. Capak
The paper explores application of genetic programming to evolution of robot morphology, and co-evolution of morphology and low-level control. Extensions to standard genetic programming are presented that allow for straight-forward storage, retrieval, transfer, modification of data stored in the context of a syntactic tree, and shared by multiple nodes. These extensions are used to embed a genetic algorithm within the genetic programming approach to evolve values of constants. Experimental results are presented and evaluated.
{"title":"Use of context blocks in genetic programming for evolution of robot morphology","authors":"M. Gregor, J. Spalek, J. Capak","doi":"10.1109/ELEKTRO.2012.6225655","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225655","url":null,"abstract":"The paper explores application of genetic programming to evolution of robot morphology, and co-evolution of morphology and low-level control. Extensions to standard genetic programming are presented that allow for straight-forward storage, retrieval, transfer, modification of data stored in the context of a syntactic tree, and shared by multiple nodes. These extensions are used to embed a genetic algorithm within the genetic programming approach to evolve values of constants. Experimental results are presented and evaluated.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121070861","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 : 2012-05-21DOI: 10.1109/ELEKTRO.2012.6225653
P. C. Vide, F. Barbosa, J. Carvalho
With the development of synchronized phasor measurement technology in recent years, it gains great interest the use of PMU measurements to improve state estimation performances. In this paper, a mixed measurement (SCADA and PMU measurements) state estimator is proposed. Several measures useful for evaluating various aspects of the performance of the mixed measurement state estimator are proposed and explained. State Estimator validity, performance and characteristics of the results on IEEE 14 bus test system are presented.
{"title":"Performance metrics for evaluation of a mixed measurement based state estimator","authors":"P. C. Vide, F. Barbosa, J. Carvalho","doi":"10.1109/ELEKTRO.2012.6225653","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225653","url":null,"abstract":"With the development of synchronized phasor measurement technology in recent years, it gains great interest the use of PMU measurements to improve state estimation performances. In this paper, a mixed measurement (SCADA and PMU measurements) state estimator is proposed. Several measures useful for evaluating various aspects of the performance of the mixed measurement state estimator are proposed and explained. State Estimator validity, performance and characteristics of the results on IEEE 14 bus test system are presented.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"184 7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124918021","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 : 2012-05-21DOI: 10.1109/ELEKTRO.2012.6225637
D. Hropko, J. Ivanecký, J. Turček
Renewable energy sources (RES), such as wind and photovoltaic power plants, suffer from their stochastic nature that is why their behavior on market is very delicate. In order to diversify risk, a concept of Virtual power plant (VPP) has been developed. The VPP is composed of several RES, from which at least one of them is fully controllable. Because the production of noncontrollable RES cannot be perfectly forecasted, therefore an optimal dispatch schedule within VPP is needed. To address this problem, an Accelerated particle swarm optimization is used to solve the constrained optimal dispatch problem within VPP. The experimental results show that the proposed optimization method provides high quality solutions while meeting constraints.
{"title":"Optimal dispatch of renewable energy sources included in Virtual power plant using Accelerated particle swarm optimization","authors":"D. Hropko, J. Ivanecký, J. Turček","doi":"10.1109/ELEKTRO.2012.6225637","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225637","url":null,"abstract":"Renewable energy sources (RES), such as wind and photovoltaic power plants, suffer from their stochastic nature that is why their behavior on market is very delicate. In order to diversify risk, a concept of Virtual power plant (VPP) has been developed. The VPP is composed of several RES, from which at least one of them is fully controllable. Because the production of noncontrollable RES cannot be perfectly forecasted, therefore an optimal dispatch schedule within VPP is needed. To address this problem, an Accelerated particle swarm optimization is used to solve the constrained optimal dispatch problem within VPP. The experimental results show that the proposed optimization method provides high quality solutions while meeting constraints.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125327326","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 : 2012-05-21DOI: 10.1109/ELEKTRO.2012.6225623
P. Hurtuk, R. Radvan, M. Frivaldský
The paper deals with research of the ways of efficiency increase of proposed hard switching full bridge converter which is suited for electroplating. The main circuit is designed as standard full bridge converter with IGBT transistors, whose switching frequency is 17 kHz. Main attention of optimization of power stage is focused on configuration of output, secondary side rectifier, which is designed in double center tapped configuration providing therefore current doubling of output current. Various types have been investigated, including diode Schottky rectifier, synchronous MOSFET rectifier together with additional auxiliary and snubber circuits and its combinations. Each solution has been experimentally verified for various and most probable operating conditions of proposed converter, whereby results have been consequently compared. Several results show, that efficiency is able to be increased when proper optimization steps are being utilized.
{"title":"Investigation of possibilities to increasing efficiency of full bridge converter designed for low output voltage and high output current applications","authors":"P. Hurtuk, R. Radvan, M. Frivaldský","doi":"10.1109/ELEKTRO.2012.6225623","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225623","url":null,"abstract":"The paper deals with research of the ways of efficiency increase of proposed hard switching full bridge converter which is suited for electroplating. The main circuit is designed as standard full bridge converter with IGBT transistors, whose switching frequency is 17 kHz. Main attention of optimization of power stage is focused on configuration of output, secondary side rectifier, which is designed in double center tapped configuration providing therefore current doubling of output current. Various types have been investigated, including diode Schottky rectifier, synchronous MOSFET rectifier together with additional auxiliary and snubber circuits and its combinations. Each solution has been experimentally verified for various and most probable operating conditions of proposed converter, whereby results have been consequently compared. Several results show, that efficiency is able to be increased when proper optimization steps are being utilized.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116812601","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 : 2012-05-21DOI: 10.1109/ELEKTRO.2012.6225645
T. Radicová, M. Zalman
Linear motors tend to be indispensable at present. Whether they are utilize in health service or in automation industry. It is certain that companies is always looking for something `more' and linear motors have it. Therefore the aim of this paper is to find better solution for introduced task. How to achieve higher precision in LMPM position control? How to adjust optimal controller parameters? This paper contains answers for more than these questions and in addition compares in more detail Pole-placement method with genetic algorithm, as well.
{"title":"LMPM position control with Luenberger observer using genetic algorithms","authors":"T. Radicová, M. Zalman","doi":"10.1109/ELEKTRO.2012.6225645","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225645","url":null,"abstract":"Linear motors tend to be indispensable at present. Whether they are utilize in health service or in automation industry. It is certain that companies is always looking for something `more' and linear motors have it. Therefore the aim of this paper is to find better solution for introduced task. How to achieve higher precision in LMPM position control? How to adjust optimal controller parameters? This paper contains answers for more than these questions and in addition compares in more detail Pole-placement method with genetic algorithm, as well.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129868013","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 : 2012-05-21DOI: 10.1109/ELEKTRO.2012.6225600
M. Benco, R. Hudec, S. Matuska, M. Zachariasova
The texture feature extraction plays important role in image analysis. This paper deals with improvement of the one-dimensional version of GLCM (Gray Level Cooccurrence Matrix). In our approach, the color information of texture was taken into consideration. The novel One dimensional Color Level Co-occurrence Matrix (1D-CLCM) are designed. Performances of proposed method are verified on database of 2600 color images. Experimental results demonstrated that 1D-CLCM is more effective compared to one-dimensional and original GLCM for image retrieval.
{"title":"One-dimensional Color-level Co-occurrence matrices","authors":"M. Benco, R. Hudec, S. Matuska, M. Zachariasova","doi":"10.1109/ELEKTRO.2012.6225600","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225600","url":null,"abstract":"The texture feature extraction plays important role in image analysis. This paper deals with improvement of the one-dimensional version of GLCM (Gray Level Cooccurrence Matrix). In our approach, the color information of texture was taken into consideration. The novel One dimensional Color Level Co-occurrence Matrix (1D-CLCM) are designed. Performances of proposed method are verified on database of 2600 color images. Experimental results demonstrated that 1D-CLCM is more effective compared to one-dimensional and original GLCM for image retrieval.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128342737","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 : 2012-05-21DOI: 10.1109/ELEKTRO.2012.6225601
D. Benedikovic, J. Litvik, M. Dado
This paper is focused on numerical investigation of optical signal propagation in the single-channel transmission systems, which employ novel types of high-order modulation formats. In the paper we present comparison of two types of high-order modulation formats, namely Amplitude Shift Keying (M-ASK) and Phase Shift Keying (M-PSK). The investigation is based on solving the nonlinear Schrodinger equation (NLSE) through Split-Step Fourier Method (SSFM). The using of high-order modulation format is one of the key solutions for future optical networks and systems. Our aim is to describe the behavior of modulated pulses and show the suitability of using the investigated modulation formats, when their transmission is influenced by various kinds of optical channel impairments.
{"title":"Modeling of single-channel optical transmission systems with high-order ASK and PSK modulation formats","authors":"D. Benedikovic, J. Litvik, M. Dado","doi":"10.1109/ELEKTRO.2012.6225601","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225601","url":null,"abstract":"This paper is focused on numerical investigation of optical signal propagation in the single-channel transmission systems, which employ novel types of high-order modulation formats. In the paper we present comparison of two types of high-order modulation formats, namely Amplitude Shift Keying (M-ASK) and Phase Shift Keying (M-PSK). The investigation is based on solving the nonlinear Schrodinger equation (NLSE) through Split-Step Fourier Method (SSFM). The using of high-order modulation format is one of the key solutions for future optical networks and systems. Our aim is to describe the behavior of modulated pulses and show the suitability of using the investigated modulation formats, when their transmission is influenced by various kinds of optical channel impairments.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128368145","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：