Healthcare, as a basic human right, did not remain immune to innovative technologies. Technological progress has significantly contributed to high-quality, on-time, acceptable and affordable healthcare. Since their appearance, nanotechnology and the Internet of Nano Things (IoNT) have continuously affected healthcare and have a tremendous influence on its transformation, contributing to the better outcome. The inclusion of nanotechnology in medicine through nanomaterials and nanodevices, known as nanomedicine, has brought numerous benefits in disease prevention, diagnosis, and treatment. Going further by connecting nanodevices to the Internet, the IoNT paradigm has been created. The inclusion of IoNT concepts in healthcare has resulted in more personalized, timely, and convenient health monitoring and treatment. Hence, nanotechnology and the IoNT hold the potential to completely revolutionize healthcare in the 21st Century, creating a system that will enable early disease detection and diagnosis followed by accurate, on-time and effective treatment with significantly reduced healthcare costs. This paper presents the roles of nanotechnology and IoNT in medicine and healthcare, and attempts to gain an insight of nanoscale solutions and approaches, highlighting benefits and discussing potential risks and concerns. Despite concerns regarding nanotoxicity, privacy and security issues, it is anticipated that nanotechnology and IoNT will show their full potential in medicine and healthcare in the years to come.
{"title":"The roles of nanotechnology and internet of nano things in healthcare transformation","authors":"M. Maksimovic","doi":"10.22430/22565337.720","DOIUrl":"https://doi.org/10.22430/22565337.720","url":null,"abstract":"Healthcare, as a basic human right, did not remain immune to innovative technologies. Technological progress has significantly contributed to high-quality, on-time, acceptable and affordable healthcare. Since their appearance, nanotechnology and the Internet of Nano Things (IoNT) have continuously affected healthcare and have a tremendous influence on its transformation, contributing to the better outcome. The inclusion of nanotechnology in medicine through nanomaterials and nanodevices, known as nanomedicine, has brought numerous benefits in disease prevention, diagnosis, and treatment. Going further by connecting nanodevices to the Internet, the IoNT paradigm has been created. The inclusion of IoNT concepts in healthcare has resulted in more personalized, timely, and convenient health monitoring and treatment. Hence, nanotechnology and the IoNT hold the potential to completely revolutionize healthcare in the 21st Century, creating a system that will enable early disease detection and diagnosis followed by accurate, on-time and effective treatment with significantly reduced healthcare costs. This paper presents the roles of nanotechnology and IoNT in medicine and healthcare, and attempts to gain an insight of nanoscale solutions and approaches, highlighting benefits and discussing potential risks and concerns. Despite concerns regarding nanotoxicity, privacy and security issues, it is anticipated that nanotechnology and IoNT will show their full potential in medicine and healthcare in the years to come.","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":"20 1","pages":"139-153"},"PeriodicalIF":0.0,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42619253","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}
J. Galeano, P. Sandoz, A. Zarzycki, L. Robert, Juan Jaramillo
Glass microscopes slides are widely used as in situ base-substrates carrying diverse micro-fabricated systems or elements. For such purposes, the micro-fabrication process consists in transferring a pre-defined design onto the substrate made of a glass microscope slide. This is known as patterning, which is a technique that can also be used in transferring specific designs that allows region of interest (ROI) recovery under the microscope. In those cases, two main challenges appear: 1) Disturbances in light transmission should remain minimum to keep the high quality of observation of the object of interest under the microscope. 2) The pattern-size should then be small enough but, however, larger than the diffraction limit to be observable satisfactorily for positioning purposes. In this article, we present the procedures involved in the microfabrication of Pseudo-Periodic Patterns (PPP) encrypting the absolute position of an extended area. Those patterns are embedded in Petri dishes in order to allow the high-accurate retrieval of absolute position and orientation. The presented microfabrication is based in a technique known as lift-off, which after parameter adjustment, allows the obtaining of PPP fulfilling the two previously mentioned requirements. The results report on PPP realized on glass microscope slides and composed by 2µm side dots made of aluminum with a thickness of 30nm.
{"title":"Microfabrication of position reference patterns onto glass microscope slides for high-accurate analysis of dynamic cellular events","authors":"J. Galeano, P. Sandoz, A. Zarzycki, L. Robert, Juan Jaramillo","doi":"10.22430/22565337.695","DOIUrl":"https://doi.org/10.22430/22565337.695","url":null,"abstract":"Glass microscopes slides are widely used as in situ base-substrates carrying diverse micro-fabricated systems or elements. For such purposes, the micro-fabrication process consists in transferring a pre-defined design onto the substrate made of a glass microscope slide. This is known as patterning, which is a technique that can also be used in transferring specific designs that allows region of interest (ROI) recovery under the microscope. In those cases, two main challenges appear: 1) Disturbances in light transmission should remain minimum to keep the high quality of observation of the object of interest under the microscope. 2) The pattern-size should then be small enough but, however, larger than the diffraction limit to be observable satisfactorily for positioning purposes. In this article, we present the procedures involved in the microfabrication of Pseudo-Periodic Patterns (PPP) encrypting the absolute position of an extended area. Those patterns are embedded in Petri dishes in order to allow the high-accurate retrieval of absolute position and orientation. The presented microfabrication is based in a technique known as lift-off, which after parameter adjustment, allows the obtaining of PPP fulfilling the two previously mentioned requirements. The results report on PPP realized on glass microscope slides and composed by 2µm side dots made of aluminum with a thickness of 30nm.","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":"20 1","pages":"117-128"},"PeriodicalIF":0.0,"publicationDate":"2017-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46789226","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}
J. A. Hernández-Muriel, A. Álvarez-Meza, J. Echeverry-Correa, A. Orozco-Gutierrez, M. Álvarez-López
Condition monitoring of Internal Combustion Engines (ICE) benefits cost-effective operations in the modern industrial sector. Because of this, vibration signals are commonly monitored as part of a non-invasive approach to ICE analysis. However, vibration-based ICE monitoring poses a challenge due to the properties of this kind of signals. They are highly dynamic and non-stationary, let alone the diverse sources involved in the combustion process. In this paper, we propose a feature relevance estimation strategy for vibration-based ICE analysis. Our approach is divided into three main stages: signal decomposition using an Ensemble Empirical Mode Decomposition algorithm, multi-domain parameter estimation from time and frequency representations, and a supervised feature selection based on the Relief-F technique. Accordingly, we decomposed the vibration signals by using self-adaptive analysis to represent nonlinear and non-stationary time series. Afterwards, time and frequency-based parameters were calculated to code complex and/or non-stationary dynamics. Subsequently, we computed a relevance vector index to measure the contribution of each multi-domain feature to the discrimination of different fuel blend estimation/diagnosis categories for ICE. In particular, we worked with an ICE dataset collected from fuel blends under normal and fault scenarios at different engine speeds to test our approach. Our classification results presented nearly 98% of accuracy after using a k-Nearest Neighbors machine. They reveal the way our approach identifies a relevant subset of features for ICE condition monitoring. One of the benefits is the reduced number of parameters.
{"title":"Feature relevance estimation for vibration-based condition monitoring of an internal combustion engine","authors":"J. A. Hernández-Muriel, A. Álvarez-Meza, J. Echeverry-Correa, A. Orozco-Gutierrez, M. Álvarez-López","doi":"10.22430/22565337.698","DOIUrl":"https://doi.org/10.22430/22565337.698","url":null,"abstract":"Condition monitoring of Internal Combustion Engines (ICE) benefits cost-effective operations in the modern industrial sector. Because of this, vibration signals are commonly monitored as part of a non-invasive approach to ICE analysis. However, vibration-based ICE monitoring poses a challenge due to the properties of this kind of signals. They are highly dynamic and non-stationary, let alone the diverse sources involved in the combustion process. In this paper, we propose a feature relevance estimation strategy for vibration-based ICE analysis. Our approach is divided into three main stages: signal decomposition using an Ensemble Empirical Mode Decomposition algorithm, multi-domain parameter estimation from time and frequency representations, and a supervised feature selection based on the Relief-F technique. Accordingly, we decomposed the vibration signals by using self-adaptive analysis to represent nonlinear and non-stationary time series. Afterwards, time and frequency-based parameters were calculated to code complex and/or non-stationary dynamics. Subsequently, we computed a relevance vector index to measure the contribution of each multi-domain feature to the discrimination of different fuel blend estimation/diagnosis categories for ICE. In particular, we worked with an ICE dataset collected from fuel blends under normal and fault scenarios at different engine speeds to test our approach. Our classification results presented nearly 98% of accuracy after using a k-Nearest Neighbors machine. They reveal the way our approach identifies a relevant subset of features for ICE condition monitoring. One of the benefits is the reduced number of parameters.","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":"20 1","pages":"159-174"},"PeriodicalIF":0.0,"publicationDate":"2017-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43863205","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}
We present an efficient virtual-optical multiplexing method for compressing information contained in gray level images. The efficiency is measured using three parameters: quality factors of recovered images, memory saving percentage achieved, and number of multiplexed images in the package. Theta modulation techniques are applied, to process an N number of gray level images, by using a virtual-optical 2f architecture, from which we obtain a complex package M, to be stored as two images, amplitude and phase, in commercial formats. We apply pixel optimization and Fourier plane filtering to amplitude and phase images, respectively, storing only a percentage of the Fourier plane with a pixel dynamic range optimization. The stored package spends much less memory than individual images. The recovered images after the demultiplexing process are compared with the original ones by using correlation coefficient, obtaining high quality factors for decompressed images. We perform simulations, showing the efficiency of the proposed process, and our results are compared to the same factors reported in recent publications, making our improvements evident.
{"title":"Analysis of the efficiency of a virtual-optical multiplexing method, by using theta modulation","authors":"Javier A. Vargas Valencia","doi":"10.22430/22565337.699","DOIUrl":"https://doi.org/10.22430/22565337.699","url":null,"abstract":"We present an efficient virtual-optical multiplexing method for compressing information contained in gray level images. The efficiency is measured using three parameters: quality factors of recovered images, memory saving percentage achieved, and number of multiplexed images in the package. Theta modulation techniques are applied, to process an N number of gray level images, by using a virtual-optical 2f architecture, from which we obtain a complex package M, to be stored as two images, amplitude and phase, in commercial formats. We apply pixel optimization and Fourier plane filtering to amplitude and phase images, respectively, storing only a percentage of the Fourier plane with a pixel dynamic range optimization. The stored package spends much less memory than individual images. The recovered images after the demultiplexing process are compared with the original ones by using correlation coefficient, obtaining high quality factors for decompressed images. We perform simulations, showing the efficiency of the proposed process, and our results are compared to the same factors reported in recent publications, making our improvements evident.","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":"20 1","pages":"173-184"},"PeriodicalIF":0.0,"publicationDate":"2017-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43322430","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}
Emilcy J. Hernández-Leal, N. Duque-Méndez, Julián Moreno-Cadavid
Big Data has become a worldwide trend and although still lacks a scientific or academic consensual concept, every day it portends greater market growth that surrounds and the associated research areas. This paper reports a systematic review of the literature on Big Data considering a state of the art about techniques and technologies associated with Big Data, which include capture, processing, analysis and data visualization. The characteristics, strengths, weaknesses and opportunities for some applications and Big Data models that include support mainly for modeling, analysis, and data mining are explored. Likewise, some of the future trends for the development of Big Data are introduced by basic aspects, scope, and importance of each one. The methodology used for exploration involves the application of two strategies, the first corresponds to a scientometric analysis and the second corresponds to a categorization of documents through a web tool to support the process of literature review. As results, a summary and conclusions about the subject are generated and possible scenarios arise for research work in the field.
{"title":"Big Data: una exploración de investigaciones, tecnologías y casos de aplicación","authors":"Emilcy J. Hernández-Leal, N. Duque-Méndez, Julián Moreno-Cadavid","doi":"10.22430/22565337.685","DOIUrl":"https://doi.org/10.22430/22565337.685","url":null,"abstract":"Big Data has become a worldwide trend and although still lacks a scientific or academic consensual concept, every day it portends greater market growth that surrounds and the associated research areas. This paper reports a systematic review of the literature on Big Data considering a state of the art about techniques and technologies associated with Big Data, which include capture, processing, analysis and data visualization. The characteristics, strengths, weaknesses and opportunities for some applications and Big Data models that include support mainly for modeling, analysis, and data mining are explored. Likewise, some of the future trends for the development of Big Data are introduced by basic aspects, scope, and importance of each one. The methodology used for exploration involves the application of two strategies, the first corresponds to a scientometric analysis and the second corresponds to a categorization of documents through a web tool to support the process of literature review. As results, a summary and conclusions about the subject are generated and possible scenarios arise for research work in the field.","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":"20 1","pages":"15-38"},"PeriodicalIF":0.0,"publicationDate":"2017-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41475038","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}
Daniel Zuluaga-Castrillón, Juan F. Hernández-Ruiz, Fabio Vargas-Galvis, M. E. López-Gómez, Claudia C. Palacio-Espinosa
Ceramic materials hardness is usually determined by Vickers microindentation, which requires rigorous sample preparation and highly demanding analysis of traces turning this method difficult to use in industrial applications. This research is focused to correlate Vickers Hardness to drilling resistance by a hard-tipped drill-bit on alumina, alumina-zirconia-silica (AZS) and alumina-chromite refractories bricks. Alumina and AZS bricks were manufactured by electromelting process leading to obtain highly densified microstructures, while alumina-chromite bricks were manufactured by pressing and sintering which conducts to lower densification and particles cohesion within the bricks microstructure. Alumina and AZS refractories measured hardness is 1506.00 ± 99.71 HV1,5N (15.10 ± 0.90 GPa) and 1028.00 ± 95.49HV2,7N (10.30 ± 0.90 GPa) respectively, which is in contrast with the low measured hardness on alumina-chromite bricks of 54.00 ± 2.00 HV50N (0.54 ± 0.02 GPa) despite of the high hardness of alumina and chromite used as feedstock maybe due to a low cohesion between the particles. Drilling resistance results showed a well-fitted behavior regarding the measured Vickers hardness then the drilling resistance test is useful to predict the hardness of highly densified as well as of friable ceramic materials.
{"title":"Uso de la perforación dinámica como un método alternativo para determinar el comportamiento mecánico de materiales refractarios","authors":"Daniel Zuluaga-Castrillón, Juan F. Hernández-Ruiz, Fabio Vargas-Galvis, M. E. López-Gómez, Claudia C. Palacio-Espinosa","doi":"10.22430/22565337.694","DOIUrl":"https://doi.org/10.22430/22565337.694","url":null,"abstract":"Ceramic materials hardness is usually determined by Vickers microindentation, which requires rigorous sample preparation and highly demanding analysis of traces turning this method difficult to use in industrial applications. This research is focused to correlate Vickers Hardness to drilling resistance by a hard-tipped drill-bit on alumina, alumina-zirconia-silica (AZS) and alumina-chromite refractories bricks. Alumina and AZS bricks were manufactured by electromelting process leading to obtain highly densified microstructures, while alumina-chromite bricks were manufactured by pressing and sintering which conducts to lower densification and particles cohesion within the bricks microstructure. Alumina and AZS refractories measured hardness is 1506.00 ± 99.71 HV1,5N (15.10 ± 0.90 GPa) and 1028.00 ± 95.49HV2,7N (10.30 ± 0.90 GPa) respectively, which is in contrast with the low measured hardness on alumina-chromite bricks of 54.00 ± 2.00 HV50N (0.54 ± 0.02 GPa) despite of the high hardness of alumina and chromite used as feedstock maybe due to a low cohesion between the particles. Drilling resistance results showed a well-fitted behavior regarding the measured Vickers hardness then the drilling resistance test is useful to predict the hardness of highly densified as well as of friable ceramic materials.","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":"20 1","pages":"99-114"},"PeriodicalIF":0.0,"publicationDate":"2017-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44852158","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}
{"title":"Reconciliación social: tecnología para la construcción de paz","authors":"M. Alzate","doi":"10.22430/22565337.739","DOIUrl":"https://doi.org/10.22430/22565337.739","url":null,"abstract":"","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":"20 1","pages":"11-15"},"PeriodicalIF":0.0,"publicationDate":"2017-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46805257","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}
Víctor D. Correa-Ramírez, Didier Giraldo Buitrago, Andrés Escobar-Mejía
espanolEn este trabajo se presenta el diseno de un controlador difuso Takagi-Sugeno (T-S), con un esquema de seguimiento de trayectoria para el sistema conocido como pendulo con rueda de reaccion. A partir del modelo de estados no lineal, se definen los puntos de operacion donde el sistema funcionara y se aplica la tecnica de linealizacion por no linealidad sectorial con el fin de implementar reguladores lineales locales. Con los modelos linealizados reducidos y con base en las caracteristicas dinamicas deseadas de lazo cerrado, se disenan los reguladores locales que, al ser combinados, usando las funciones de pertenencia del modelo difuso, generan la senal de control global que contiene dos terminos: el regulador y el seguimiento simple de la referencia.El controlador difuso propuesto logra llevar el pendulo desde su posicion de equilibrio natural a la posicion invertida de forma gradual, con oscilaciones de amplitud creciente y con minimo error de seguimiento. Cuando el pendulo alcanza la posicion deseada invertida, se usa un regulador sobre el modelo linealizado completo alrededor del punto de operacion. Los resultados de simulacion muestran el seguimiento de la trayectoria angular (del pendulo) y el desempeno del controlador ante pequenas perturbaciones. La senal de control y la velocidad angular de la rueda son presentadas con el fin de verificar que se mantienen dentro de los limites de operacion establecidos. Si bien se presenta saturacion en la senal de control, se obtiene un error de seguimiento menor a 0,22 radianes. EnglishIn this work, the design of a Takagi-Sugeno Fuzzy controller with a trajectorytracking scheme for the reaction wheel pendulum is presented. By using the nonlinear state-space model, the system’s operating points are defined, then, the sector nonlinearity method is applied to obtain a linearized model of the system in order to implement linear local regulators. Once the reduced linearized models are obtained, and based on the desired closed loop response, local regulators are designed to generate the global control signal. This signal comprises two terms: The regulator and the reference tracking term. The proposed Fuzzy controller allows the pendulum to reach the upright position from its natural state by swinging it up with minimum tracking error. Once the upright position is reached, a regulator is implemented to operate over the linearized model around the operating point (i.e., upright position). Simulation results present both, the tracking of the angular trajectory and the controller behavior during small perturbations. It is shown that the control signal and the wheel speed remain within their boundaries. Although the control signal saturates, a tracking error less than 0.22 radians is observed.
{"title":"Control difuso del péndulo invertido con rueda de reacción usando seguimiento de trayectoria","authors":"Víctor D. Correa-Ramírez, Didier Giraldo Buitrago, Andrés Escobar-Mejía","doi":"10.22430/22565337.690","DOIUrl":"https://doi.org/10.22430/22565337.690","url":null,"abstract":"espanolEn este trabajo se presenta el diseno de un controlador difuso Takagi-Sugeno (T-S), con un esquema de seguimiento de trayectoria para el sistema conocido como pendulo con rueda de reaccion. A partir del modelo de estados no lineal, se definen los puntos de operacion donde el sistema funcionara y se aplica la tecnica de linealizacion por no linealidad sectorial con el fin de implementar reguladores lineales locales. Con los modelos linealizados reducidos y con base en las caracteristicas dinamicas deseadas de lazo cerrado, se disenan los reguladores locales que, al ser combinados, usando las funciones de pertenencia del modelo difuso, generan la senal de control global que contiene dos terminos: el regulador y el seguimiento simple de la referencia.El controlador difuso propuesto logra llevar el pendulo desde su posicion de equilibrio natural a la posicion invertida de forma gradual, con oscilaciones de amplitud creciente y con minimo error de seguimiento. Cuando el pendulo alcanza la posicion deseada invertida, se usa un regulador sobre el modelo linealizado completo alrededor del punto de operacion. Los resultados de simulacion muestran el seguimiento de la trayectoria angular (del pendulo) y el desempeno del controlador ante pequenas perturbaciones. La senal de control y la velocidad angular de la rueda son presentadas con el fin de verificar que se mantienen dentro de los limites de operacion establecidos. Si bien se presenta saturacion en la senal de control, se obtiene un error de seguimiento menor a 0,22 radianes. EnglishIn this work, the design of a Takagi-Sugeno Fuzzy controller with a trajectorytracking scheme for the reaction wheel pendulum is presented. By using the nonlinear state-space model, the system’s operating points are defined, then, the sector nonlinearity method is applied to obtain a linearized model of the system in order to implement linear local regulators. Once the reduced linearized models are obtained, and based on the desired closed loop response, local regulators are designed to generate the global control signal. This signal comprises two terms: The regulator and the reference tracking term. The proposed Fuzzy controller allows the pendulum to reach the upright position from its natural state by swinging it up with minimum tracking error. Once the upright position is reached, a regulator is implemented to operate over the linearized model around the operating point (i.e., upright position). Simulation results present both, the tracking of the angular trajectory and the controller behavior during small perturbations. It is shown that the control signal and the wheel speed remain within their boundaries. Although the control signal saturates, a tracking error less than 0.22 radians is observed.","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":"20 1","pages":"55-67"},"PeriodicalIF":0.0,"publicationDate":"2017-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46293757","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}
Nicolás Muñoz-Galeano, J. M. López-Lezama, Fernando Villada-Duque
Este articulo presenta una metodologia para la determinacion del desplazamiento angular (conexiones o grupos horarios (coloquial)) en transformadores trifasicos. La metodologia propuesta sirve para determinar el desplazamiento angular si se conocen las conexiones o si se desea determinado desplazamiento angular tambien poder obtener las conexiones. Si bien la conexion de transformadores trifasicos requiere el conocimiento del desplazamiento angular, la literatura tecnica no reporta una metodologia o procedimiento riguroso explicito para determinarlas. Sin embargo, existen numerosas aplicaciones en las areas de ingenieria e investigacion que requieren el conocimiento de la conexion y el desplazamiento angular. El articulo presenta la metodologia para determinar las conexiones Yy, Yd, Dy, Dd, Zy y Zd; que incluye las aplicaciones de ingenieria mas relevantes. La metodologia propuesta se puede aplicar de forma indiferente tanto para transformadores comerciales como no comerciales o para transformadores de potencia o de distribucion.
{"title":"Metodología para la determinación del desplazamiento angular en transformadores trifásicos","authors":"Nicolás Muñoz-Galeano, J. M. López-Lezama, Fernando Villada-Duque","doi":"10.22430/22565337.580","DOIUrl":"https://doi.org/10.22430/22565337.580","url":null,"abstract":"Este articulo presenta una metodologia para la determinacion del desplazamiento angular (conexiones o grupos horarios (coloquial)) en transformadores trifasicos. La metodologia propuesta sirve para determinar el desplazamiento angular si se conocen las conexiones o si se desea determinado desplazamiento angular tambien poder obtener las conexiones. Si bien la conexion de transformadores trifasicos requiere el conocimiento del desplazamiento angular, la literatura tecnica no reporta una metodologia o procedimiento riguroso explicito para determinarlas. Sin embargo, existen numerosas aplicaciones en las areas de ingenieria e investigacion que requieren el conocimiento de la conexion y el desplazamiento angular. El articulo presenta la metodologia para determinar las conexiones Yy, Yd, Dy, Dd, Zy y Zd; que incluye las aplicaciones de ingenieria mas relevantes. La metodologia propuesta se puede aplicar de forma indiferente tanto para transformadores comerciales como no comerciales o para transformadores de potencia o de distribucion.","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":"20 1","pages":"41-53"},"PeriodicalIF":0.0,"publicationDate":"2017-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42250123","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}
Sergio D. Saldarriaga-Zuluaga, J. M. López-Lezama, Nicolás Galeano
En la ultima decada, un gran numero de trabajos de investigacion han abordado el problema de la expansion de los sistemas de potencia, coordinando en un solo problema de optimizacion el planeamiento de expansion de la generacion (GEP, Generation Expansion Planning) y el planeamiento de expansion de la transmision (TEP, Transmission Expansion Planning). El GEP normalmente se lleva a cabo sin tener en cuenta las restricciones de red y desde una perspectiva energetica. Por otro lado, el TEP busca encontrar los refuerzos en la red, que atiendan una demanda futura de forma economica y confiable. La integracion de estos problemas ha sido abordada utilizando diferentes metodos, modelos y funciones objetivo. En este articulo se presenta una revision bibliografica del problema del planeamiento integrado GEP-TEP desde diferentes puntos de vista como su modelado, metodos de solucion, consideraciones de confiabilidad, entre otros. En la literatura especializada se encuentran articulos de revision que caracterizan de forma independiente los problemas GEP y TEP. Sin embargo, no se encuentran revisiones que aborden problema GEP-TEP integrado. Surge entonces la necesidad de caracterizar los aspectos del planeamiento de la expansion integrada de los sistemas de potencia, con el proposito de proporcionar herramientas de consulta para los investigadores en este campo.
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