14 results
Search Results
2. Experimental resuts and simulation with TRNSYS of a 7.2 kWp grid-connected photovoltaic system
- Author
-
C. Sánchez, J. Cañada, Benjamin Quesada, R. Royo, and J. Payá
- Subjects
Engineering ,Experimental installation ,Management, Monitoring, Policy and Law ,TRNSYS ,Database ,TECNOLOGIA ELECTRONICA ,Monocrystalline ,Performance assessment ,Cell temperature ,Fill factor ,Algebraic method ,Standard test conditions ,Grid-connected photovoltaic power system ,Long term performance ,Accurate prediction ,Simulation ,Experimental campaign ,Photovoltaic system ,Tilted surface ,Grid-connected photovoltaic system ,Experimental study ,business.industry ,Long-term change ,Mechanical Engineering ,Model validation ,Power injection ,Building and Construction ,Monocrystalline PV ,Grid ,Power (physics) ,Experimental installations ,Dynamic models ,General Energy ,Algebra ,Simulation result ,Photovoltaic effects ,MAQUINAS Y MOTORES TERMICOS ,Valencia ,Reduction (mathematics) ,business ,TERMODINAMICA APLICADA (UPV) ,Nominal power (photovoltaic) ,Model ,PV system - Abstract
This paper presents a dynamic model and experimental results of a 7.2. kWp photovoltaic (PV) installation located at the Polytechnic University of Valencia (Spain). The modelling of the monocrystalline cells has been realised in TRNSYS and has been validated during an extensive experimental campaign from January 2001 to March 2003, using the data of a fully monitored PV field. The simulation results with TRNSYS provide an accurate prediction of the long-term performance. In addition to the dynamic models, algebraic methods such as the constant fill factor have also been applied.In the design of PV systems, there are several important uncertainties which have to be taken into account, such as the reduction of power with respect to the nominal power under Standard Test Conditions (STC), the choice of the meteorological database, and the models for the calculation of the radiation on tilted surface and of the cell temperature. These aspects are analyzed thoroughly in this paper, as well as the problems inherent to the PV power injection into the grid.
- Published
- 2011
- Full Text
- View/download PDF
3. Control Tolerante a Fallas Activo: Estimación y acomodación de fallas en sensores aplicado al modelo LPV de una bicicleta sin conductor
- Author
-
F. Canales-Abarca, Carlos-Manuel Astorga-Zaragoza, Arturo Zavala-Río, and J.A. Brizuela-Mendoza
- Subjects
0209 industrial biotechnology ,Engineering ,Diagnóstico de fallas ,General Computer Science ,Observer (quantum physics) ,lcsh:Control engineering systems. Automatic machinery (General) ,Observadores ,Hardware_PERFORMANCEANDRELIABILITY ,02 engineering and technology ,Active fault ,Diagnostic system ,Fault (power engineering) ,LPV systems ,lcsh:TJ212-225 ,020901 industrial engineering & automation ,Control theory ,0202 electrical engineering, electronic engineering, information engineering ,sistemas LPV ,Observers ,Fault diagnosis ,observadores ,observers ,business.industry ,Noise (signal processing) ,Fault tolerance ,Sistemas LPV ,Fault indicator ,Control and Systems Engineering ,control tolerante a fallas ,020201 artificial intelligence & image processing ,Fault Tolerant Control ,business ,Control tolerante a fallas ,Computer Science(all) - Abstract
[ES] Se presenta el diseño de un control tolerante a fallas (CTF) activo aplicado al modelo de una bicicleta sin conductor con representación Lineal de Parámetros Variables en el tiempo (LPV) polinomial, afectado por fallas aditivas en los sensores y ruido de medición. Dentro del CTF, el sistema de diagnóstico de fallas opera en base a las estimaciones de un observador de fallas, el cual genera el aislamiento de dichas fallas. Los algoritmos propuestos, considerados como las principales aportaciones del trabajo, logran estimaciones de fallas y variables de estado libres de ruido, con el objetivo de generar indicadores de falla y ley de control, respectivamente. La tolerancia a fallas del sistema se consigue a través de un conjunto de observadores. Los resultados se presentan en simulación de on utilizando el modelo LPV de una bicicleta sin conductor, considerando un controlador para la estabilización de la postura vertical a lo largo de su movimiento traslacional y su velocidad como parámetro variable., [EN] This paper presents an Active Fault Tolerant Control design applied to a riderless bicycle LPV model affected by additive sensor fault and measurement noise. Within the Active Fault Tolerant Control, the detection and diagnostic system is based on the estimations computed by a fault observer, used to determine a fault occurrence. The proposed algorithms, considered as the main contributions in this work, achieves noise-free estimations for the faults and state, in order to compute the fault indicator and control law, respectively. The fault tolerance of the system is guaranteed through the fault accommodation based on a set of observers. The results have been corroborated using a riderless bicycle LPV model, with a controller that aims at keeping it stood-up along its translation motion.
- Published
- 2016
- Full Text
- View/download PDF
4. Sistema de Alerta al Conductor Basado en Realimentación Vibro-Táctil
- Author
-
Franco Penizzotto, Vicente Mut, and Emanuel Slawiñski
- Subjects
Engineering ,Accidents prevention ,General Computer Science ,lcsh:Control engineering systems. Automatic machinery (General) ,Automotive ,purl.org/becyt/ford/2.2 [https] ,INGENIERÍAS Y TECNOLOGÍAS ,seguridad ,estímulos táctiles de fuerza ,Tactile stimuli ,sensors and virtual instrument ,lcsh:TJ212-225 ,Sensors and virtual instrument ,Prevención de Accidentes ,Electronic systems ,Seguridad ,Simulation ,Ingeniería Eléctrica, Ingeniería Electrónica e Ingeniería de la Información ,Risk level ,Warning system ,business.industry ,automoción ,Estímulos Táctiles de Fuerza ,Steering wheel ,Vibro-tactile stimuli ,Sistemas de Automatización y Control ,vibro-tactile stimuli ,accidents prevention ,Sensores e Instrumentos Virtuales ,Line (electrical engineering) ,sensores e instrumentos virtuales ,Embedded software ,purl.org/becyt/ford/2 [https] ,Control and Systems Engineering ,Automoción ,automotive ,prevención de accidentes ,Safety ,business ,Computer Science(all) - Abstract
[ES] Este trabajo propone el diseño y desarrollo de un sistema de alerta al conductor basado en la realimentación de estimulos vibro- táctiles de fuerza con el objetivo de prevenir accidentes de tránsito. El sistema posee dos agarres vibro-tactiles, los cuales se pueden montar facilmente sobre cualquier tipo de vehículo, y un sistema electrónico basado en un sistema de localización y comunicación inalámbrica entre vehículos, que permite calcular en línea una señal de alerta vibro-táctil para avisar al conductor de una posible situación de peligro en los proximos segundos. Un modelo focalizado en factores humanos es propuesto y utilizado para justificar el uso adecuado de estímulos artificiales. Además se describen, el hardware, la comunicación entre vehículos y software embebido. Finalmente, el sistema es probado en un simulador 3D de carrera de código abierto y también utilizando dos vehículos comunes., [EN] This paper proposes the design and build of a driver warning system, based on vibro-tactile feedback for preventing accidents through the generation of tactile stimuli. The system has two vibro-tactile grips devices which are easily mounted on the steering wheel of any vehicle and an electronic system based on location sensing as well as inter-vehicles communication, from which a risk level is computed on line in order to warn the driver about dangerous situations and risk zones. A model focalized on human factors is proposed and it is employed to justify the advantages of using artificial stimuli. Besides, the hardware, communication between vehicles and embedded software, are described too. Finally, experiences using the device in a racing car simulator and tests using two ordinary cars are shown., Financiado por el Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), y la Universidad Nacional de San Juan.
- Published
- 2015
5. Analysis of fluid-dynamic guidelines in diesel particulate filter sizing for fuel consumption reduction in post-turbo and pre-turbo placement
- Author
-
Héctor Climent, José Ramón Serrano, Pedro Piqueras, and Emanuele Angiolini
- Subjects
Pressure drop ,Diesel engine ,Engineering ,Diesel particulate filter ,business.industry ,Mechanical Engineering ,INGENIERIA AEROESPACIAL ,Building and Construction ,Management, Monitoring, Policy and Law ,Sizing ,Automotive engineering ,law.invention ,Diesel fuel ,Pre-turbo aftertreatment ,General Energy ,Volume (thermodynamics) ,law ,Fuel consumption ,MAQUINAS Y MOTORES TERMICOS ,Fuel efficiency ,DPF sizing ,Pressure-drop ,business ,Filtration - Abstract
Wall-flow particulate filters are in the present days a standard aftertreatment system widely used in diesel engines to reduce particle emissions and meet emission regulations. This paper deals with the analysis of the macro- and meso-geometry definition of the DPF monoliths from a fluid-dynamic modelling approach. Focus is driven to the analysis of the influence on pressure drop and hence on engine fuel economy. The influence of the DPF volume on the engine performance is analysed with a gas dynamic software including both post-turbo and pre-turbo placement under clean and soot loading conditions. A swept in cell density is also considered for different thermal integrity factors. This approach allows analysing the trends in pressure drop and cell unit geometric parameters defining the monolith thermal and mechanical performance. A discussion considering constant specific filtration area and constant filtration area is performed providing a comprehensive understanding of the DPF and engine response as volume and cellular geometry are changed. Results are leading to rigorously justify known but usually empirical guidelines for DPF design in post-turbo applications. A discussion on the potential for monolith volume reduction in pre-turbo applications with respect to the post-turbo baseline is addressed. This is based on the very low sensitivity of fuel consumption and pressure drop both to volume reduction and soot and ash loading with pre-turbo DPF configuration, This work has been partially supported by the Spanish Ministry of Economy and Competitiveness through Grant No. TRA2013-40853-R. Additionally, the Ph.D. student E. Angiolini has been funded by a grant from Conselleria de Educacio, Cultura i Esport of the Generalitat Valenciana with reference GRISOLIA/2013/036. These supports are gratefully acknowledged by the authors.
- Published
- 2014
6. Algoritmo para el cálculo de la velocidad media óptima en una ruta (ASGA)
- Author
-
M. Munoz Organero and V. Corcoba Magana
- Subjects
Engineering ,General Computer Science ,Real-time computing ,lcsh:Control engineering systems. Automatic machinery (General) ,computer.software_genre ,Algoritmos Genéticos ,lcsh:TJ212-225 ,Intelligent Transport System ,Android ,Sistemas inteligentes de transporte ,Advanced Driver Assistance Systems ,Simulation ,Sistemas de ayuda a la conducción ,Telecomunicaciones ,business.industry ,Genetic Algorithms ,Conducción eficiente ,Genetic algorithms ,ADAS ,Travel time ,Control and Systems Engineering ,Fuel efficiency ,Eco-driving ,Web service ,Intelligent transport system ,business ,Sistemas Inteligentes de Transporte ,Algoritmos genéticos ,computer ,Computer Science(all) - Abstract
[EN] This paper proposes an algorithm for obtaining the optimal average speed to save fuel and improve safety. The proposed algorithm is based on genetic algorithms. The algorithm uses information about the environment, the road and the vehicle for obtaining the optimal average speed which it minimizes fuel consumption without dramatically increasing the travel time. Moreover, the proposed algorithm improves safety adapting vehicle speed to road conditions. The environment information is obtained from web services and vehicle information is obtained through the OBD2 port. The algorithm is validated in situations with and without incidents. In addition, we analyze the impact of the average speed and acceleration incidents and their impact on fuel consumption., [ES] En este trabajo se propone un algoritmo para obtener la velocidad media óptima para ahorrar combustible y mejorar la seguridad. El algoritmo propuesto se basa en los algoritmos genéticos. El algoritmo emplea información sobre el entorno, la carretera y el vehículo para obtener la velocidad media que minimice el consumo de combustible sin incrementar drásticamente la duración del trayecto. Además, el algoritmo propuesto mejora la seguridad ya que adecua la velocidad a las condiciones de la vía. La información sobre el entorno se obtiene de servicios web y la información sobre el vehículo se obtiene a través del puerto OBD2. El algoritmo es validado en situaciones reales con incidentes de tráfico y sin ellos. Por otra parte, se analiza el impacto de la velocidad media y los incidentes de tráfico en las aceleraciones y su influencia en el consumo de combustible., The research leading to these results has received funding from the ARTEMISA project TIN2009-14378-C02-02 within the Spanish "Plan Nacional de I+D+I" and from the Spanish Ministerio de Economía y Competitividad funded projects IRENE (PT-2012-1036-370000), COMINN (IPT-2012-0883-430000) and REMEDISS (IPT-2012-0882-430000) within the INNPACTO program.
- Published
- 2014
7. Modelado de Control de Nivel en Molde para Vaciado Continuo de Palanquillas de Acero
- Author
-
Boris Luis Rustán Téllez, Guillermo González Yero, and Mercedes Ramírez Mendoza
- Subjects
Gray box testing ,Engineering ,Engineering drawing ,General Computer Science ,Scale (ratio) ,lcsh:Control engineering systems. Automatic machinery (General) ,Servomechanism ,Level Control ,Industria del acero ,law.invention ,lcsh:TJ212-225 ,law ,business.industry ,Process (computing) ,Modeling ,Control engineering ,Modelado ,Control de nivel ,Steelmaking ,Continuous casting ,Identification (information) ,Control and Systems Engineering ,Control system ,business ,Steel Industry ,Computer Science(all) - Abstract
[EN] This paper presents a model of system for the mould level control in a continuous casting machine for steel billets. The objective was to carry out the modeling of each element of the system including disturbances and transformations of the plant that affect the quality of control in the installation study object. It was obtained and validated an approximate model of the control system using physical laws governing the same one, experimental identification by special signals and parametric identification off- line. The model explicitly includes the phenomena of obstruction and erosion of the valve which have a significant impact on the operation of the plant. For hydraulic servo system achieved a gray box model contributes to a better understanding of the process and evaluates incidence of the multi-frequency implemented under conventional outline. Obtained the model can be studied scale simulation system operation and the effectiveness of advanced control solutions. The developed work is part of an I+D process that in the course of more than 10 years, it has contributed to that in the steelmaking where is carried out the investigation, there is a mould level control system that has positive impact on the quality of steel produced., [ES] Este trabajo presenta un modelo del sistema de control de nivel en molde de una máquina de vaciado continuo de palanquillas de acero. El objetivo fue realizar el modelado de cada elemento del sistema incluyendo las perturbaciones y transformaciones de la planta que más afectan la calidad del control. Se obtuvo y validó un modelo aproximado, utilizando leyes físicas, la identificación experimental mediante señales especiales e identificación paramétrica fuera de línea. En el modelo se incluyen de forma explícita los fenómenos de obstrucción y erosión en la válvula, que tienen una incidencia significativa en el funcionamiento de la planta. Para el servosistema hidráulico de la instalación se logró un modelo de caja gris que contribuye a un mejor entendimiento del comportamiento del proceso y a evaluar la incidencia de una implementación multifrecuencia bajo esquema convencional. Con el modelo obtenido es posible estudiar la operación del sistema a escala de simulación y la efectividad de soluciones de control avanzadas. El trabajo desarrollado es parte de un proceso de I+D que en el transcurso de más de 10 años ha contribuido a que en la acería donde se realiza la investigación, exista un sistema de control de nivel en molde que tiene impacto positivo sobre la calidad del acero producido.
- Published
- 2014
8. Control No Lineal Basado en Pasividad de Motores de Inducción para Alto Desempeño Dinámico
- Author
-
Alejandro Garces, Hoover Mujica, and Gerardo Espinosa-Perez
- Subjects
Scheme (programming language) ,Engineering ,General Computer Science ,Passivity ,Stability (learning theory) ,Speed tracking ,Control theory ,Position (vector) ,Control no lineal basado en pasividad ,computer.programming_language ,business.industry ,Seguimiento velocidad ,Alto desempeño dinámico ,Nonlinear passivity-based control ,Control engineering ,alto desempeño dinámico ,Variable (computer science) ,Nonlinear system ,Control and Systems Engineering ,Motor de inducción ,business ,computer ,Induction motor ,Induction Motor ,High dynamic performance ,Computer Science(all) - Abstract
[EN] Position and velocity tracking control with high dynamic performance of induction motors has generated great interest in the control community, due to the advantageous characteristics that this rotating machine exhibits. Unfortunately, the results reported in the specialized literature about this topic are mainly focused on the study of the stability properties of the control scheme, leaving the dynamic performance as a secondary issue. In this paper, the analysis of a nonlinear controller designed using passivity concepts is presented. This analysis is mainly oriented towards the performance evaluation of the induction motor when highly variable velocity profiles are imposed. Following a Root–Cause analysis, it is evaluated the implementation facility of this control scheme and the required implementation issues that improve its dynamic response. Special attention is given to the necessity of differentiate signals that appears in the control structure and several alternatives to carry this operation out are evaluated. The results are presented in simulation, as well as, in an experimental setup. In both cases the analysis is validated by key indicators of performance that identify the scenario with the best behavior under different operation conditions. The results show that the scenario with the best performance corresponds to the basic structure considered in the literature but incorporating suitable modifications that define a tuning strategy that allows to reach excellent dynamic performance., [ES] El control de seguimiento de posición y velocidad con alto desempeño dinámico para el motor de inducción ha generado gran interés en la comunidad de control, debido a las características favorables que presenta esta máquina rotatoria. Desafortunadamente, los resultados presentados en la literatura especializada del área están enfocados principalmente a estudiar las propiedades de estabilidad de los esquemas de control y no al desempeño dinámico que estos pueden lograr. En este artículo se presenta el análisis orientado principalmente a evaluar el desempeño que puede alcanzar un motor de inducción con perfiles de velocidad altamente variables, cuando se utiliza un controlador no lineal diseñado a partir de conceptos de pasividad. Específicamente, se evalúa la facilidad que ofrece este controlador para su implementación y los procedimientos para mejorar su respuesta dinámica, estos últimos obtenidos como resultado de un análisis causa-raíz. En particular, se estudian diferentes posibilidades para abordar la necesidad de derivar señales que aparecen en la estructura del controlador. Se presentan resultados tanto en simulación como en una plataforma experimental, ambos apoyados por indicadores clave de desempeño que identifican los escenarios con los que se obtienen mejores desempeños en distintas condiciones de operación. Se muestra que el escenario de mejor desempeño facilita la implementación y relaja las condiciones impuestas en la literatura del área sobre el perfil de velocidad deseado y el par de carga. Adicionalmente, se establece una política de sintonía del controlador que permite alcanzar alto desempeño dinámico., Parte de este trabajo fue desarrollado con el apoyo de DGAPA - UNAM IN114513) y II-FI-UNAM (1111). El trabajo de Hoover Mújica fue desarrollado con el apoyo de CONACYT, México.
- Published
- 2014
9. Un Banco de Pruebas Remoto para Experimentación en Robótica Ubicua
- Author
-
Gabriel Núñez, José Ramiro Martínez-de Dios, Anibal Ollero, Alberto de San Bernabe, Adrian Jimenez-Gonzalez, Universidad de Sevilla. Departamento de Ingeniería de Sistemas y Automática, and Universidad de Sevilla. TEP151: Robótica, Visión y Control
- Subjects
Engineering ,General Computer Science ,Networked robots ,lcsh:Control engineering systems. Automatic machinery (General) ,computer.software_genre ,lcsh:TJ212-225 ,Bancos de pruebas ,Wireless ,Redes inalámbricas de sensores ,business.industry ,Testbed ,Mobile robot ,Robotics ,Wireless sensor networks ,Robótica ubicua ,Camera network ,Control and Systems Engineering ,Embedded system ,Operating system ,Robot ,Artificial intelligence ,Testbeds ,business ,Wireless sensor network ,computer ,Computer Science(all) - Abstract
[EN] The lack of adequate experimental tools has been highligh- ted as a major critical issue in the development of ubiquitous ro- botics integrating mobile robots and wireless sensor networks. This paper describes a remotely operated testbed for ubiquitous robotics experimentation. It is currently comprised of 5 Pio- neer 3-AT robots, a camera network and a wireless sensor net- work WSN, each equipped with widespread off-the-shelf sen- sors. The testbed architecture allows wide variety of coopera- tion schemes among its elements, abstracting their particula- rities and sensory, computational and communication capabi- lities. It also allows performing experiments with different de- grees of decentralization. The testbed, currently deployed in the School of Engineering at the University of Seville, is open and can be accessed remotely through a friendly graphical user in- terface., [ES] La escasez de herramientas experimentales adecuadas ha sido señalada como un factor crítico en el desarrollo de la robótica ubícua. Este artículo describe un banco de pruebas remoto para experimentación en robótica ubicua integrando robots con redes inalámbricas de sensores. El banco de pruebas está compuesto por 5 robots Pioneer 3-AT, por una red de cámaras y por una red inalámbrica de sensores, todos ellos equipados con una amplia variedad de sensores. La arquitectura del banco de pruebas permite una gran diversidad de esquemas de cooperación entre sus elementos abstrayendo sus particularidades y capacidades sensoriales, computacionales y de comunicaciones. Permite ejecutar experimentos con distintos grados de descentralización. El banco de pruebas, instalado en la Escuela Técnica Superior de Ingeniería de la Universidad de Sevilla, es abierto y hace posible el acceso de forma remota mediante una interfaz gráfica intuitiva., Este trabajo ha sido financiado parcialmente por la red de excelencia CONET, Cooperating Objects Network of Excellence (INFSO-ICT-224053) de la Comisión Europea en el Programa ICT del VII Programa Marco y por el proyecto de Excelencia Robótica Ubicua en Entornos Urbanos financiado por la Junta de Andalucía. Aníbal Ollero agradece además la financiación parcial por parte de EC-SAFEMOBIL (ICT-288082).
- Published
- 2014
10. Control Robusto de Orden Fraccionario de la Presión del Vapor en el Domo Superior de una Caldera Bagacera
- Author
-
Javier Sotomayor-Moriano, Fernando J. Castillo-Garcia, Raul Rivas-Perez, and Vicente Feliu-Batlle
- Subjects
Steam drum ,Engineering ,General Computer Science ,lcsh:Control engineering systems. Automatic machinery (General) ,PID controller ,Combustion ,Controlador de orden fraccionario IDα-1 ,Fractional order controller IDα-1 ,lcsh:TJ212-225 ,Robust control of steam pressure ,Control robusto de presión de vapor ,Mathematical model ,Control theory ,Caldera bagacera ,Fractional-order control ,Modelo matemático ,Eficiencia energética ,business.industry ,Boiler (power generation) ,food and beverages ,Steam pressure ,energy efficiency ,eficiencia energética ,Energy efficiency ,Bagasse boiler ,Control and Systems Engineering ,Robust control ,business ,Computer Science(all) ,Efficient energy use - Abstract
[EN] This paper presents a fractional order controller of the class IDα-1 for robust control of the steam pressure in the steam drum of a bagasse boiler. The proposed controller improves the effectiveness on the control, and likewise the energy efficiency of this plant. The dynamics of this process drastically changes with the variation of the specific heat of combustion (I) and the use of a fractional order control looks therefore suitable. A mathematical nominal model of the steam pressure variation in the steam drum of a bagasse boiler was obtained and validated. Experimental studies provided an estimation of the range of variation of the parameters’ model when the specific heat of combustion varies in the operating range [Imin, Imax]. The proposed fractional order controller has been compared to the standard PI and PID controllers. All of them have been designed by means of the same frequency specifications and their nominal time responses are similar when input reference changes and in presence of disturbances. The PID controller and the fractional order one have been also designed in order to maximize their robustness when the gain of the steam pressure in the steam drum of bagasse boiler changes in the range [Kmin, Kmax]. Simulated results show that the fractional order controller is more robust than the PI and the PID controllers when the gain of the plant changes but preserving the robustness when time delay varies., [ES] En el presente trabajo se desarrolla un controlador de orden fraccionario del tipo IDα-1 para el control robusto de la presión de vapor en el domo superior de una caldera bagacera, el cual posibilita aumentar la efectividad en el control, así como la eficiencia energética de estos equipos. La aplicación de un controlador de orden fraccionario se justifica por el hecho de que la dinámica del proceso objeto de estudio puede cambiar de forma drástica con la variación del calor especifico de combustión (I). Se obtiene un modelo matemático nominal de la variación de la presión de vapor en el domo superior de la caldera bagacera. Los resultados de validación del modelo matemático obtenido muestran un elevado grado de adecuación. Mediante estudios experimentales se estimó el rango de variación de los parámetros dinámicos del modelo matemático obtenido cuando el calor específico de combustión varía en el rango de operación [Imin,-1Imax]. El diseño del controlador IDα se realiza en base a especificaciones en el dominio de la frecuencia. Se muestran los resultados comparativos de simulación del sistema de control desarrollado con controladores IDα-1 vs PI e IDα-1 vs PID, en el sentido de exhibir el mismo comportamiento dinámico en lazo cerrado para las especificaciones de la planta nominal y en presencia de perturbaciones. Estos resultados demuestran que cuando la ganancia de la presión del vapor en el domo superior de la caldera bagacera presenta variaciones en-1el rango [Kmin, Kmax] el controlador IDα diseñado exhibe mejores prestaciones, así como una mayor robustez., Este trabajo ha sido financiado parcialmente debido al apoyo recibido del Departamento de Ingeniería de la Pontificia Universidad Católica del Perú.
- Published
- 2014
11. Estrategia Guiada por Modelos para incluir Aspectos de Seguridad en Sistemas Empotrados Basados en Servicios Web
- Author
-
Juan Pedro Silva Gallino, Alejandro Alonso, Javier Fernández Briones, and Miguel A. de Miguel
- Subjects
MDD ,Engineering ,Process management ,General Computer Science ,DPWS ,lcsh:Control engineering systems. Automatic machinery (General) ,Maintainability ,Design elements and principles ,Access control ,Context (language use) ,Reuse ,World Wide Web ,lcsh:TJ212-225 ,Web of Things ,WS-SecurityPolicy ,Confidentiality ,Pol’ıticas de Servicios Web ,MDD DPWS ,Informática ,Telecomunicaciones ,Políticas de Servicios Web ,business.industry ,Perfil de Dispositivos para Servicios Web ,Control and Systems Engineering ,Desarrollo Guiado por Modelos ,The Internet ,WS-Policy ,business ,Seguridad en Servicios Web ,Computer Science(all) - Abstract
[EN] In modern distributed systems, such as in the Internet or Web of Things, security plays a fundamental role. Special atention must be placed, then, in considering these aspects in the first stages of development. In this context, the model-driven development of non functional (NF) requirements is of great interest, as it addresses those NF characteristics in the design stage, when analyses can be performed, and there is room for changes while they are still not too costly. The use of modeldriven methodologies brings with them some intrinsic benefits, such as the increase in productivity, a greater reuse of design elements, or an improved maintainability of the system. This paper presents a development strategy that allows integrating non-functional security aspects (such as as confidentiality, integrity, or access control) in embedded systems design., [ES] En los sistemas distribuidos modernos, como la Internet o Web de las Cosas, la seguridad juega un papel preponderante. Debe prestarse especial atención a la consideración de estos aspectos en las primeras etapas de desarrollo. En este contexto, el desarrollo guiado por modelos de requisitos no funcionales (NF) presenta especial interés, ya que aborda dichas características NF en la etapa de diseño, cuando todavía se pueden realizar análisis, y aún hay margen para modificaciones antes de que éstas sean muy costosas. El uso de estas metodologías guiadas por modelos ofrece beneficios tales como el aumento de la productividad, una mayor reutilización de los elementos de diseño, o una mejor mantenibilidad del sistema. Este artículo presenta una estrategia de desarrollo que permite integrar aspectos NF de seguridad (confidencialidad, integridad, y control de acceso) en los sistemas de software empotrado., Este trabajo ha sido financiado en parte por el Centro Español de Desarrollo Tecnológico (CDTI, Ministerio de Industria, Comercio y Turismo), por medio del proyecto ITECBAN (Infraestructura Tecnológica y Metodológica de Soporte para un Core Bancario), del programa INGENIO 2010, y por el Ministerio Español de Educación y Ciencia, por medio del proyecto RT-MODEL (Plataformas de tiempo real para diseño de sistemas empotrados basado en modelos, TIN2008-06766-C03- 03) del Plan Nacional de I+D+I.
- Published
- 2014
12. Modeling and control of a new ball and beam system with magnetic levitation
- Author
-
Freddy Naranjo and Pablo Moriano
- Subjects
Engineering ,General Computer Science ,Sliding mode control ,levitación magnética ,control por ganancias programadas ,control por modos deslizantes ,Levitacion magnética ,Gain schedulingcontrol ,Control theory ,Magnetic levitation ,Ball and beam system ,magnetic levitation ,Control por ganancias programadas ,Gain scheduling control ,Sistema bola viga ,business.industry ,sliding mode control ,Control por modos deslizantes ,Ball and beam ,Magnetic levitation system ,Nonlinear system ,Gain scheduling ,Control and Systems Engineering ,gain scheduling control ,Levitación magnética ,business ,Computer Science(all) - Abstract
[ES] En este artículo se presenta el modelado matemático y control de un nuevo sistema bola viga con levitación magnética. El sistema propuesto, es una combinación de un sistema de levitación magnética de un grado de libertad y un sistema bola viga convencional. De está manera, el sistema resultante es no lineal y subactuado, el cual presenta características que resultan desafiantes desde el punto de vista de control para su uso como banco de pruebas en un laboratorio. El modelo dinámico del sistema es obtenido utilizando el método de Lagrange. Los algoritmos de control no lineal de ganancias programadas y modos deslizantes son utilizados para estabilizar el sistema en simulaciones y pruebas reales., [EN] This paper shows the mathematical model and control of a new ball and beam system with magnetic levitation. The proposed system is a combination between the magnetic levitation system of one degree of freedom and the conventional ball and beam system. The given system is nonlinear and under actuate showing interesting characteristics from the control point of view for using it in a control lab. The dynamic model of the system is obtained based on the Lagrange's method. The algorithms of gain scheduling and sliding mode are used to stabilize the system in simulations and in the lab.
- Published
- 2012
- Full Text
- View/download PDF
13. Linkage-based movable bridges: Design methodology and three novel forms
- Author
-
Ashley P. Thrall, Sigrid Adriaenssens, Ignacio Paya-Zaforteza, and Theodore P. Zoli
- Subjects
Optimization ,Engineering ,Structural elements ,INGENIERIA DE LA CONSTRUCCION ,Kinematics ,Bridge design ,Design Methodology ,Heuristic (computer science) ,Parametric models ,Parameterization ,Linkage (mechanical) ,Movable bridge ,Structural optimization ,Multi objective ,Simulated annealing ,law.invention ,Numerical model ,Deployable structure ,Movable bridges ,Conceptual design ,Shape optimization ,law ,Section profiles ,Heuristic algorithms ,Local search (optimization) ,Bridge ,PROYECTOS DE INGENIERIA ,Sizing optimization ,Civil and Structural Engineering ,business.industry ,Linkage ,Self-weight ,Methodology ,Local search ,Structural engineering ,Algorithm ,Kinematic equations ,Multi-objective simulated annealing ,INGENIERIA CARTOGRAFICA, GEODESIA Y FOTOGRAMETRIA ,business ,Descent local search ,Optimization procedures - Abstract
Linkages have been widely used in machines and deployable structures, but these mechanisms have rarely been employed in the design of movable bridges. This paper explores the use of linkages both to actuate the kinematic motion and to serve as structural elements of movable bridges. First, the design methodology for these forms is presented which includes (1) physical shape-finding to develop a conceptual design, (2) generation of a parametric model and kinematic equations, and (3) multi-objective structural optimization for minimum self-weight and minimum force for operation. This optimization procedure includes shape optimization to determine the lengths and relative angles of members and sizing optimization to design the section profiles of members to meet the specifications of current American bridge design code. Heuristic algorithms, including descent local search and multi-objective simulated annealing, are employed. Three novel linkage-based forms, featuring 38. m movable spans, that were designed using this methodology are presented. This research suggests the beginning of an investigation into alternative forms for movable bridges using linkages. © 2011 Elsevier Ltd., This material is based upon work supported by the National Science Foundation Graduate Research Fellowship under Grant No. DGE-0646086. Dr. Thrall is also grateful for support from the Norman J. Sollenberger Fellowship. Dr. Paya-Zaforteza has been involved with this research project while on appointment as a Postdoctoral Fellow under the Program for Postdoctoral Stays administered by the Spanish Ministry of Education(Contract Number EX-2008-0669). The authors are grateful for the advice of Professors Maria E.M. Garlock (Princeton University), David P. Billington (Princeton University), and James K. Guest (Johns Hopkins University). The authors would also like to thank the anonymous reviewers for their helpful comments and suggestions.
- Published
- 2012
- Full Text
- View/download PDF
14. Wind farm electrical power production model for load flow analysis
- Author
-
Manuel Alcázar-Ortega, Guillermo Escrivá-Escrivá, and Isidoro Segura-Heras
- Subjects
Engineering ,Correlated wind speeds ,Farms ,Production engineering ,Wind profile ,Electric utilities ,Agricultural engineering ,Speed ,Wind speed ,Weather forecasting ,Wind farm ,Wind profile power law ,Electricity ,Wind farms ,Wind energy ,Weibull theory ,Electricity generation ,Wind power ,Renewable Energy, Sustainability and the Environment ,business.industry ,Electrical engineering ,Reliability ,Electric generators ,Renewable energy ,Offshore wind power ,Spain ,Distributed generation ,Renewable resource ,Wind velocity ,INGENIERIA ELECTRICA ,Weibull distribution ,Electric power ,Weibull ,business ,Electric load forecasting ,Prediction ,Reliability analysis ,Electric power supplies to apparatus - Abstract
The importance of renewable energy increases in activities relating to new forms of managing and operating electrical power: especially wind power. Wind generation is increasing its share in the electricity generation portfolios of many countries. Wind power production in Spain has doubled over the past four years and has reached 20. GW. One of the greatest problems facing wind farms is that the electrical power generated depends on the variable characteristics of the wind. To become competitive in a liberalized market, the reliability of wind energy must be guaranteed. Good local wind forecasts are therefore essential for the accurate prediction of generation levels for each moment of the day.This paper proposes an electrical power production model for wind farms based on a new method that produces correlated wind speeds for various wind farms. This method enables a reliable evaluation of the impact of new wind farms on the high-voltage distribution grid. © 2010 Elsevier Ltd.
- Published
- 2011
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.