Airplanes
Mostrando 1-12 de 16 artigos, teses e dissertações.
-
1. High-Altitude Platforms — Present Situation and Technology Trends
ABSTRACT High-altitude platforms (HAPs) are aircraft, usually unmanned airships or airplanes positioned above 20 km, in the stratosphere, in order to compose a telecommunications network or perform remote sensing. In the 1990 and 2000 decades, several projects were launched, but very few had continued. In 2014, 2 major Internet companies (Google and Facebook
J. Aerosp. Technol. Manag.. Publicado em: 2016-09
-
2. Modal Shape Analysis Using Thermal Imaging
ABSTRACT: In recent years, advances in aeronautical engineering field include, among others, the development of increasingly lightweight and flexible materials, allowing better performance of systems in applications such as Unmanned Aerial Vehicles, photographic model airplanes, light weight aircraft etc. This progress, however, can cause difficulties in des
J. Aerosp. Technol. Manag.. Publicado em: 2015-06
-
3. An Airplane Calculator Featuring a High- Fidelity Methodology for Tailplane Sizing
ABSTRACT: The present work is concerned with the accurate modeling of transport airplanes. This is of primary importance to reduce aircraft development risks and because multi-disciplinary design and optimization (MDO) frameworks require an accurate airplane modeling to carry out realistic optimization tasks. However, most of them still make use of tail volu
J. Aerosp. Technol. Manag.. Publicado em: 2013-12
-
4. Analysis of microstrip antennas on carbon fiber composite material
In this paper a truncated corner rectangular microstrip antenna (TCRMA) is analyzed in the presence of carbon fiber composite (CFC) material. Simplified carbon fiber composite models are proposed and the analyses are performed by the electromagnetic simulator Computer Simulation Technologies (CST). Theoretical and experimental results of return loss, axial r
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2012-06
-
5. Expansão da ocupação urbana de Gramado: estudo de caso da aplicação de fotografias aéreas de pequeno formato e SIG
Small format vertical aerial photographs were obtained from non metric cameras on small size airplanes, in 1999, and aimed to update a set of six digital cadastral maps from 1984, in the scale of 1:5,000, covering the urban area of Gramado county, located at the northeast region of the Rio Grande do Sul state, Brazil. The photographs were digitized, stored a
Publicado em: 2010
-
6. HYBRID SYSTEM USING GAS TURBINE AND FUEL CELL FOR AERONAUTICAL APU APPLICATION
Much effort and resources are being directed to reduce emissions in the most varied sectors. Today, aviation accounts for less than 5% of human related CO2 emissions, but projections for 2050 indicate that the growth of aviation emissions risks undermining the mitigation progress achieved in other sectors. In aeronautics, increasing fuel efficiency is consid
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 200904
-
7. Thermal boundary layer effects in aeronautical airfoils icing accretion. / Efeitos da camada limite térmica na formação de gelo em aerofólios de uso aeronáutico.
O modelo de avaliação da camada limite dinâmica e térmica foi implementado, no presente trabalho, em um código numérico para o cálculo do coeficiente de transferência de calor convectivo sobre aerofólios de uso aeronáutico com formação de gelo. Foram considerados, no modelo da camada limite turbulenta, os efeitos da rugosidade equivalente do grã
Publicado em: 2009
-
8. Ruído ambiental e seus efeitos: o ruído aeronáutico no entorno do Aeroporto Internacional de Brasília
The noise is the more evident environmental impact generated by the aviation in the neighborhood of the airports, could cause considerable damages to the life quality and the health of the affected population. This work had as main objective to evaluate the indisposition provoked by the aeronautical noise in close resident communities to the International Ai
Publicado em: 2008
-
9. Design of an automatic landing system using linear quadratic tracker.
This work presents the application of the Linear Quadratic Tracker (LQT) for the automatic landing system of passenger transport airplanes. The design method to achieve an autoland flare law with improved performance and disturbance rejection is described. With this method the design is direct and more formal thus avoiding the somewhat time consuming and mor
Publicado em: 2008
-
10. Evaluation of digital terrain model extracted from SAR data in X-Band of SAR R-99B / Avaliação do Modelo Digital do Terreno Extraído de Dados SAR Interferométricos na Banda X do SAR R-99B
In the Brazilian territory there are several areas with no topographic mapping coverage and the existent maps are not updated due to the continuous land use and land cover changes. The Sistema de Prote¸cao da Amazonia (SIPAM) uses airplanes with synthetic aperture radar which allows to image in several conditions. This radar was designed for recoinassance t
Publicado em: 2007
-
11. A aviaÃÃo agrÃcola no Brasil: um modelo para seleÃÃo de aviÃes com o uso da programaÃÃo linear / The agricultural aviation in Brazil: a model for selection of airplanes with the use of the linear programming
The objective of this work is the optimization of the more viable model to the agricultural airplane for certain area of soybean cultivation, with possibility from decrease of costs and risks in the activity, increasing the competitiveness of the agrobusiness through the linear programming. The work presents a literature revision about the concepts of microe
Publicado em: 2006
-
12. Analysis of the productivity of the Brazilian air transportation. / Análise da produtividade do transporte aéreo brasileiro.
This doctoral thesis focuses on the analysis of the productivity of the main production factors, labor, capital, energy and also on the processes directly managed by the airlines. The thesis assesses the operational productivity and its explaining variables in the post-deregulation period, as well as its impacts on the economic performance of Brazilian airli
Publicado em: 2004