Pub Date : 2012-05-21DOI: 10.1109/ELEKTRO.2012.6225626
S. Kaščák, M. Praženica, M. Valčo, P. Cubon, M. Klasovity
This paper deals with vector control of Two-Phase Induction Machine (TPIM). Each phase of induction motor is fed independently by one-phase full-bridge inverter. A general model suitable for Indirect Rotor-Field-Oriented Control (IRFOC) system of the two-phase induction machines including a relatively simple and effective decoupling scheme is proposed in the paper. However, model asymmetry in TPIM causes extra coupling between two stator windings. To use the IRFOC, the asymmetry must be eliminated by using an appropriate variable changing. A computer simulation and experimental verification of the IRFOC for two-phase induction motor drive is realized and results are presented.
{"title":"Vector control of two-phase IM using dSpace","authors":"S. Kaščák, M. Praženica, M. Valčo, P. Cubon, M. Klasovity","doi":"10.1109/ELEKTRO.2012.6225626","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225626","url":null,"abstract":"This paper deals with vector control of Two-Phase Induction Machine (TPIM). Each phase of induction motor is fed independently by one-phase full-bridge inverter. A general model suitable for Indirect Rotor-Field-Oriented Control (IRFOC) system of the two-phase induction machines including a relatively simple and effective decoupling scheme is proposed in the paper. However, model asymmetry in TPIM causes extra coupling between two stator windings. To use the IRFOC, the asymmetry must be eliminated by using an appropriate variable changing. A computer simulation and experimental verification of the IRFOC for two-phase induction motor drive is realized and results are presented.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"29 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":"125331825","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.2012.6225608
J. Ilavský, K. Rástočný
In order to gain an improvement of safety or availability measures of the safety-relevant control system through employment of redundancy a redundant system has to comply with the requirement on independence of redundant parts. If the requirements on the independence of redundant parts are unfulfilled, then a common-cause failure can through its effects on multiple redundant parts directly cause a hazardous state on a system level. Identification of sources and quantification of the common-cause failure parameters proved to be a formidable task. The latter problem, including other major safety-affecting factors lays in the focus of this paper. Our proposed technical safety analysis concept is extended, so now it partially covers elusive problems related to the common-cause failures.
{"title":"Comprehensive technical safety analysis approach including common-cause failures","authors":"J. Ilavský, K. Rástočný","doi":"10.1109/ELEKTRO.2012.6225608","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225608","url":null,"abstract":"In order to gain an improvement of safety or availability measures of the safety-relevant control system through employment of redundancy a redundant system has to comply with the requirement on independence of redundant parts. If the requirements on the independence of redundant parts are unfulfilled, then a common-cause failure can through its effects on multiple redundant parts directly cause a hazardous state on a system level. Identification of sources and quantification of the common-cause failure parameters proved to be a formidable task. The latter problem, including other major safety-affecting factors lays in the focus of this paper. Our proposed technical safety analysis concept is extended, so now it partially covers elusive problems related to the common-cause failures.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"5 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":"126876803","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.2012.6225575
S. Matuska, R. Hudec, M. Benco
In order to fill gap of growing demand for high efficient image and video processing, open source computer vision library (OpenCv) is way to deals with this task. Hence, this paper is about basic algorithm for image processing and their CPU time consumption in Matlab comparing with OpenCv. Algorithms are tested on images with resolution 3264×2448, 1920×1080, 1024×768 and 220×260. Multi-processors computer and multi-threading programs are used to improve processing efficiency.
{"title":"The comparison of CPU time consumption for image processing algorithm in Matlab and OpenCV","authors":"S. Matuska, R. Hudec, M. Benco","doi":"10.1109/ELEKTRO.2012.6225575","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225575","url":null,"abstract":"In order to fill gap of growing demand for high efficient image and video processing, open source computer vision library (OpenCv) is way to deals with this task. Hence, this paper is about basic algorithm for image processing and their CPU time consumption in Matlab comparing with OpenCv. Algorithms are tested on images with resolution 3264×2448, 1920×1080, 1024×768 and 220×260. Multi-processors computer and multi-threading programs are used to improve processing efficiency.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"43 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":"129038149","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.2012.6225673
Eliška Jurisová, L. Ladanyi, J. Mullerová
This contribution presents numerical studies of the nonlinear fiber Bragg gratings (FBGs). The proposed model corresponds well to chalcogenide FBGs as a considerable tool for optical switching. The spectral response of this device is discussed theoretically. Simulations based on the nonlinear coupled mode theory are used for investigating the relationships between the spectral transmission of nonlinear chalcogenide FBGs and the grating parameters.
{"title":"Spectral response of optical switches based on chalcogenide bistable fiber Bragg gratings","authors":"Eliška Jurisová, L. Ladanyi, J. Mullerová","doi":"10.1109/ELEKTRO.2012.6225673","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225673","url":null,"abstract":"This contribution presents numerical studies of the nonlinear fiber Bragg gratings (FBGs). The proposed model corresponds well to chalcogenide FBGs as a considerable tool for optical switching. The spectral response of this device is discussed theoretically. Simulations based on the nonlinear coupled mode theory are used for investigating the relationships between the spectral transmission of nonlinear chalcogenide FBGs and the grating parameters.","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":"132298868","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.2012.6225679
L. Suslik, D. Pudiš, J. Škriniarová, J. Kovác, I. Kubicová, I. Martincek, J. Novák, S. Hascik
In this paper, effect of 2D photonic pattern on the emission properties of the GaAs/AlGaAs based light emitting diode (LED) emitting at wavelength of 850 nm is demonstrated. For LED surface patterning, the interference lithography based on a double-exposure process using two-beam interference method was used. The prepared photonic structure pattern in the LED surface was analyzed by atomic force microscope. Such prepared LED with 2D patterned photonic structure shows considerable enhancement of light extraction efficiency and improved far-field radiation pattern.
{"title":"2D photonic structure with square symmetry in the GaAs/AlGaAs LED surface","authors":"L. Suslik, D. Pudiš, J. Škriniarová, J. Kovác, I. Kubicová, I. Martincek, J. Novák, S. Hascik","doi":"10.1109/ELEKTRO.2012.6225679","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225679","url":null,"abstract":"In this paper, effect of 2D photonic pattern on the emission properties of the GaAs/AlGaAs based light emitting diode (LED) emitting at wavelength of 850 nm is demonstrated. For LED surface patterning, the interference lithography based on a double-exposure process using two-beam interference method was used. The prepared photonic structure pattern in the LED surface was analyzed by atomic force microscope. Such prepared LED with 2D patterned photonic structure shows considerable enhancement of light extraction efficiency and improved far-field radiation pattern.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"65 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":"128319395","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.2012.6225583
B. Dobrucký, M. Beňová, S. Kaščák
The paper deals with design analysis, simulation, synthesis and verification of power resonant converter integrated with LCLC filter, HF transformer and rectifying output. The output voltage of LCTLC in the basic AC direct mode is sinusoidal one with harmonic distortion roughly 5% in the whole range of the load with possibility of non-symmetrical control of the converter. A novel detailed analysis of over-loaded rectifying mode with DC output is given, as well as transfer and transient properties analysis, nonlinearity including. Simulations based on Matlab/ OrCad models confirmed by experimental results of both modes are given in the paper.
{"title":"LCTLC resonant converter analysis with direct AC and rectifying output","authors":"B. Dobrucký, M. Beňová, S. Kaščák","doi":"10.1109/ELEKTRO.2012.6225583","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225583","url":null,"abstract":"The paper deals with design analysis, simulation, synthesis and verification of power resonant converter integrated with LCLC filter, HF transformer and rectifying output. The output voltage of LCTLC in the basic AC direct mode is sinusoidal one with harmonic distortion roughly 5% in the whole range of the load with possibility of non-symmetrical control of the converter. A novel detailed analysis of over-loaded rectifying mode with DC output is given, as well as transfer and transient properties analysis, nonlinearity including. Simulations based on Matlab/ OrCad models confirmed by experimental results of both modes are given in the paper.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"30 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":"134165031","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.2012.6225627
A. Rybovic, M. Priecinsky, M. Paskala
Solving the operation of the inverted pendulum is one of the classical and fundamental problems in the area of control theory. In this paper, method of modern control by placement poles with help Ackerman's method is presented. Control strategies are tested using simulation analysis and in real - time experiments which consists of hardware system PS600 and control units from dSpace company. The model is designed in MATLAB/Simulink environment. Finally, comparison of the results between the simulation model and the real plant is desribed.
{"title":"Control of the inverted pendulum using state feedback control","authors":"A. Rybovic, M. Priecinsky, M. Paskala","doi":"10.1109/ELEKTRO.2012.6225627","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225627","url":null,"abstract":"Solving the operation of the inverted pendulum is one of the classical and fundamental problems in the area of control theory. In this paper, method of modern control by placement poles with help Ackerman's method is presented. Control strategies are tested using simulation analysis and in real - time experiments which consists of hardware system PS600 and control units from dSpace company. The model is designed in MATLAB/Simulink environment. Finally, comparison of the results between the simulation model and the real plant is desribed.","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":"116340596","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.2012.6225620
P. Peniak
The article deals with a model of application gateway and creation of an open application interface for generic Material Flow Control Systems (MFCs). The developed interface is to cover fundamental requirements of production systems for customization and real-time control of material flow within manufacturing processes. Designed solution has been tested and evaluated for Automated Guided Vehicle (AGV) supply system in real production environment.
{"title":"Creating model of open application interface for material flow control systems","authors":"P. Peniak","doi":"10.1109/ELEKTRO.2012.6225620","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225620","url":null,"abstract":"The article deals with a model of application gateway and creation of an open application interface for generic Material Flow Control Systems (MFCs). The developed interface is to cover fundamental requirements of production systems for customization and real-time control of material flow within manufacturing processes. Designed solution has been tested and evaluated for Automated Guided Vehicle (AGV) supply system in real production environment.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"35 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":"128060339","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.2012.6225674
D. Kacik, P. Tatár
We propose novel structure of double cladding Photonic crystal fiber (PCF) as a sensing element. First cladding allows one core mode propagation only. Second cladding consists of ring of holes with the average refractive index of the ring higher than the basic material of the fiber. Advantage of this arrangement against core - cladding interferometers is, that by suitable choice of refractive index of second cladding holes, the possibility to investigate the external refractive index in the region where phase constant of interfering modes shows an extreme (equalisation wavelength).
{"title":"Modal interferometer based on double cladding photonic crystal fiber for refractive index measurement by equalisation wavelength","authors":"D. Kacik, P. Tatár","doi":"10.1109/ELEKTRO.2012.6225674","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225674","url":null,"abstract":"We propose novel structure of double cladding Photonic crystal fiber (PCF) as a sensing element. First cladding allows one core mode propagation only. Second cladding consists of ring of holes with the average refractive index of the ring higher than the basic material of the fiber. Advantage of this arrangement against core - cladding interferometers is, that by suitable choice of refractive index of second cladding holes, the possibility to investigate the external refractive index in the region where phase constant of interfering modes shows an extreme (equalisation wavelength).","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"115 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":"124117345","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.2012.6225580
Andrej Tkac, V. Wieser, S. Pollak
In this paper the simulation of Rician and Rayleigh fading model and calculation of channel impulse response for these models are reported. Radio channels in radio systems are usually characterized as multipath fading channels. In environment between transmitter and receiver there exist two main signal propagation components, Line-of-Sight (LOS) and Non-Line-of-Sight (NLOS), which are described through Rician fading model, resp. Rayleigh fading model. The parameter which is widely used for channel classification is the channel impulse response.
{"title":"Calculation of impulse response in Rician and Rayleigh channel","authors":"Andrej Tkac, V. Wieser, S. Pollak","doi":"10.1109/ELEKTRO.2012.6225580","DOIUrl":"https://doi.org/10.1109/ELEKTRO.2012.6225580","url":null,"abstract":"In this paper the simulation of Rician and Rayleigh fading model and calculation of channel impulse response for these models are reported. Radio channels in radio systems are usually characterized as multipath fading channels. In environment between transmitter and receiver there exist two main signal propagation components, Line-of-Sight (LOS) and Non-Line-of-Sight (NLOS), which are described through Rician fading model, resp. Rayleigh fading model. The parameter which is widely used for channel classification is the channel impulse response.","PeriodicalId":343071,"journal":{"name":"2012 ELEKTRO","volume":"89 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":"124769473","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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