Power Cables
Mostrando 1-12 de 14 artigos, teses e dissertações.
-
1. Experimental evaluation of the wind effects on an operating power transmission tower
Abstract Static and dynamic effects on power transmission towers can be evaluated by methodologies available in codes, which suggest the use of linear static analysis. By using numerical simulations, it is possible to observe the strong influence of the geometric nonlinear behavior of transmission cables. Dynamic effects also strongly influence this behavior
REM, Int. Eng. J.. Publicado em: 2016-09
-
2. A validation metrics based model calibration applied on stranded cables
The present work is aimed at building a computational model for a typical stranded cable based on the basic principles of Verification and Validation. The model calibration and model tracking are guided based on a pool of validation metrics suitable for data which are commonly used in structural dynamics. The estimator used for the associated inverse problem
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-12
-
3. Innovation in X-Ray technology
In the Non-Destructive Testing (NDT) industry, the mayor trends are from film and stand alone applications to digital and inline inspection. Furthermore the quality requirements are growing driven by pushing design and material limits. Especially for field applications based on security reasons as well as image quality, replacement of isotopes can be monitor
Matéria (Rio de Janeiro). Publicado em: 2011
-
4. Distribution of power dividers in passive optical networks using genetic algorithms / Distribuição de divisores de potência em redes ópticas passivas utilizando algoritmos genéticos
This study, based on a genetic algorithm, optimizes the distribution of power dividers used, in the access, by passive optical networks, where each splitter has one input and several outputs. The practical scenario of distribution includes a particular city where the streets are the possible ways and the houses or buildings are the possible terminals. Starti
Publicado em: 2010
-
5. Localização de defeitos em alimentadores primários subterrâneos : formulação estendida baseada na impedância aparente
O presente trabalho apresenta uma abordagem estendida para o diagnóstico de faltas em sistemas subterrâneos de distribuição de energia. O esquema proposto desenvolve modificações às técnicas de localização de defeitos em sistemas de distribuição aéreos baseadas no cálculo da impedância aparente, adaptando-as para a aplicação em alimentadores
Publicado em: 2009
-
6. Telescopic continuum robot for tasks at high positions. / Robô contínuo telescópico para tarefas em alturas elevadas.
Among several applications of robots in the service field, it is possible to percept an increasing interest in manipulate tools in higher positions using automatic devices, due to the fact that such activities are high risked operations and demands the use of several safety equipments. The most common examples of this kind of activity are the inspection of m
Publicado em: 2009
-
7. A Contribution to the Estimation of Indicators of the Operational State of Insolated Power Cables with Water Trees / Uma contribuição à estimativa de indicadores de desempenho do estado operacional de cabos isolados sob a ação das arborescências
Distinct matters related to power quality challenges represent areas of growing interest for the electric engineering community. By considering the subject of power supply with quality and reliability, the continuity of the supply appears as a very important task to be fulfilled. As a matter of fact, the occurrence of failures in components and installations
Publicado em: 2008
-
8. Modelagem numérica da camada limite atmosférica com validação experimental
This work presents the modeling of the atmospheric boundary layer to get the wind speed and wind direction profile over a complex terrain. The study of the atmospheric boundary layer is very important for the power lines project, determination of power cables insulating chain oscillation, power line limit load project and study of atmosphere pollutant disper
Publicado em: 2007
-
9. Robô móvel suspenso por fio com pernas de comprimentos variáveis / A mobile robot suspended by wire with variable length legs
Some theoretical and experimental studies have been developed in order to produce independent equipment for inspection and maintenance of electric power and telecommunication transmition lines, increasing the process efficiency and reducing the risk of accidents with the employees who execute the task. This activity suits mobile robots because they are able
Publicado em: 2006
-
10. A mobile robot suspended by wire with variable length legs / Robà mÃvel suspenso por fio com pernas de comprimentos variÃveis
Some theoretical and experimental studies have been developed in order to produce independent equipment for inspection and maintenance of electric power and telecommunication transmition lines, increasing the process efficiency and reducing the risk of accidents with the employees who execute the task. This activity suits mobile robots because they are able
Publicado em: 2006
-
11. Bancada de Ensaios Mecânicos à Fadiga de Cabos Condutores de Energia / Test apparatus to perform fatigue endurance capability in power line cables
O presente trabalho descreve uma Bancada para realização de ensaios de fadiga em cabos condutores de energia. A Bancada foi projetada e construída de forma a permitir a condução de uma ampla gama de ensaios, em especial, além dos ensaios de fadiga, pode-se conduzir ensaios de vibração e de amortecimento próprio do cabo, entre outros. À concepção
Publicado em: 2006
-
12. Planejamento de vistorias usando robôs móveis autônomos e otimização pelo algoritmo de colônia de formigas
Robot-based inspection on sites with difficult access is a problem that becomes more common nowadays. Searching for solutions to this challenge, its observed new initiatives, either in orientated form in robot competitions like Robocup Rescue, or practical applications in companies that offer remoted operated vehicles to inspect pipes, galleries and further
Publicado em: 2005