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← Explore all topicsAbstract A process of support design for wind tunnel models and the evaluation of interferences effect are described in this…
Abstract To study the physiological effects of airport noise exposure on organisms, Sprague-Dawley (SD) rats were exposed in soundproof chambers…
Abstract This chapter deals with the position control of quadrotor unmanned aerial vehicle (UAV) when quadrotor’s linear velocity is unavailable.…
Abstract Unmanned helicopters (UHs) develop quickly because of their ability to hover and low speed flight. Facing different work conditions,…
Abstract European Union is involving increasing amount of resources on research projects that will dramatically change the costs of building…
Abstract The flight actuation system plays important role in the accurate guidance of the flight vehicles. The actuators driving the…
Abstract Active flow control has recently received an increasing attention since it allows to directly manipulate the flow-field around a…
Abstract Modifications on the intermediate turbine duct in order to reduce noise emissions by changing interaction frequencies and/or modes capable…
It is difficult to avoid thunderstorm regions by aircraft, so that on average every commercial airliner is struck by lightning once per year. Defining test and design criteria of aircraft is becoming important since aircraft safety is increasingly dependent on electronic equipment and the development of new materials (carbon composites, etc.) to replace the metallic airframes. In-flight statistics show that most strikes occurred 3-5 km above sea level, where the temperature is ~ 0C (Uman & Rakov, 2003; Larsson, 2002). There are two different types of lightning strikes to aircraft. The first type is that the aircraft initiates the lightning discharge when it is found in the intense electric field region of a thundercloud, and the second is the interception by the aircraft of an approaching lightning leader. The mechanism for lightning initiation by aircraft is often explained using the “bidirectional leader” theory (Clifford & Casemir,…
The synthetic aperture radar (SAR) is considered now as the most effective instrument for producing radar images of ground scenes with a high spatial resolution. The usage of small aircrafts as the platform for the deployment of SAR systems is attractive from the point of view of many practical applications. Firstly, this enables for a substantial lowering of the exploitation costs of SAR sensors. Secondly, such solution provides a possibility to perform a rather quick surveillance and imaging of particular ground areas. Finally, the progress in this direction will allow for a much wider application of SAR sensors. However, the formation of high-quality SAR images with SAR systems deployed on small aircrafts is still a challenging problem. The main difficulties come from significant variations…
This chapter presents the analysis of the maintenance process of a military aircraft with a detailed description of two areas, i.e. the process of maintaining and the process of operating. Each of these processes is briefly characterized. The section also involves methods enabling the determination of: residual durability of specified devices/systems of a military aircraft on the basis of the diagnostic parameters of these devices/systems, and the effectiveness of a combat task execution on the basis of information registered in the process of aiming. Each presented method is illustrated by a computational example. Tasks executed by the military aircraft A modern military aircraft (MMA) is a hybrid of the most up-to-date achievements in the…
Most of researches concerning In-Flight Entertainment (IFE) systems are done on case bases without a global view that encompasses all IFE components. Thus, we try to highlight the key factors of designing IFE system, and showing how its various components can integrate together to provide the required services for all parties involved with the system. Background and historical issues Flight entertainment started before the First World War by the Graf Zeppelin (see Figure 1). This aircraft had a long, thin body with a teardrop shape; it was about 776 feet long and 100 feet in diameter, filled with hydrogen, and the cabin was located under the hull; five engines were fixed to the hull to power the aircraft. Fig. 1. The Graf Zeppelin aircraft From the passengers comfort perspective, this model was equipped with a kitchen having electric ovens and a refrigeration unit, a small dinning room, washrooms for men and women, and passenger cabins with a capacity of two passengers each. Unfortunately, the craft was not heated, so passengers were dressing heavy coats and covered with blankets during winter flights. As developments went on, the “Hindenburg” aircraft came with heated passenger area, larger dinning room, passengers lounge with a piano as the first audio entertainment, a decorated writing room, a more enhanced passenger cabins, and promenades with seating and windows that can be opened during the flight (Airships.net, Last visit 2011). In 1949, the “De Havilland DH 106 Comet” was the first commercial jet airliner to go into service. It had four jet engines located into the wings. It provided passengers with low-noise pressurized cabin (when compared to propeller-driven airliners), and large windows; hot and cold drinks, and food are serviced through the galley; separate women and men washrooms were available (Davies & Birtles, 1999). Starting from 1960, In-Flight Entertainment (IFE) systems started to attract attention; they were basically a pre-selected audio track that may be accompanied with a film projector. They had shown improvements in both vertical and horizontal dimensions. They expanded horizontally by improving the existing services; audio entertainment moved from using simple audio devices to surround sound and live radio; video display progressed from using a film projector, to CRT displays hanged in the ceiling, to LCD displays dedicated to each…