Calibration of the GNSS Receivers — Methods, Results and Evaluation
Ta-Kang Yeh1 Department of Real Estate and Built Environment, National Taipei University, New Taipei City, Taiwan Introduction GNSS (Global Navigation Satellite System) positioning technology has been utilized for surveying engineering,…
Numerical Study of Support Interferences on the SOAR Separation Wind Tunnel Test
Abstract A process of support design for wind tunnel models and the evaluation of interferences effect are described in this chapter. The work was performed at the Von Karman Institute…
Studies on Effects of Aircraft Noise on Behavior of Rats, Their Plasma Norepinephrine Levels and Cell Morphology of the Temporal Lobe
Abstract To study the physiological effects of airport noise exposure on organisms, Sprague-Dawley (SD) rats were exposed in soundproof chambers to previously recorded aircraft-related noise for 65 d. As a…
A Hierarchical Tracking Controller for Quadrotor Without Linear Velocity Measurements
Abstract This chapter deals with the position control of quadrotor unmanned aerial vehicle (UAV) when quadrotor’s linear velocity is unavailable. We propose a hierarchical tracking controller for quadrotor UAV. The…
Self-Healing Control Framework Against Actuator Fault of Single-Rotor Unmanned Helicopters
Abstract Unmanned helicopters (UHs) develop quickly because of their ability to hover and low speed flight. Facing different work conditions, UHs require the ability to safely operate under both external…
Morphing Technologies: Adaptive Ailerons
Abstract European Union is involving increasing amount of resources on research projects that will dramatically change the costs of building and operating aircraft in the near future. Morphing structures are…
Loads Simulator System for Testing and Qualification of Flight Actuators
Abstract The flight actuation system plays important role in the accurate guidance of the flight vehicles. The actuators driving the control surfaces are aerodynamically loaded during flight. The design, testing…
Active Flow Control by Using Plasma Actuators
Abstract Active flow control has recently received an increasing attention since it allows to directly manipulate the flow-field around a surface only when it is effectively requested. Aerodynamic plasma actuators…
Progress in Experimental Research of Turbine Aeroacoustics
Abstract Modifications on the intermediate turbine duct in order to reduce noise emissions by changing interaction frequencies and/or modes capable to propagate are presented. Also different turbine exit casings are…
Introduction to Study of Effects of Lightning Strikes to an Aircraft
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, 1982; Mazur, 1989; Mazur et al., 1990; Mazur & Moreau, 1992), which describes the aircraft-initiated lightning process as a positive leader starting from the aircraft in the direction of the ambient electric field; this is followed, a few milliseconds later, by a negative leader developing in the opposite direction. This order of events is a consequence of the lower electric …
