Vertical take-off and landing (VTOL) aircraft have become important aerial vehicles for various sectors, such as security, health, commercial sectors. These are capable of operating in different flight modes, allowing the covering most requirements environments. A tail-sitter is a type VTOL vehicle that has ability to take off land vertically on it elevators (its tail) or some rigid support ele...

This paper focusses on the attitude stabilization of a mini tail-sitter aircraft, considering aerodynamic effects. The main characteristic of this vehicle is that it operates in either the hover mode for launch and recovery, or the horizontal mode during cruise. The dynamic model is obtained using the Euler–Lagrange formulation, and aerodynamic effects are obtained by studying the propeller eff...

Advanced Surface Movement Guidance and Control Systems need the identification of aircraft and vehicles in airport movement area. In this work, a video identification algorithm, based on the tail number recognition, is proposed as a part of a global surveillance video system. The aircraft identification problem has to deal with three fundamental aspects: capturing and preprocessing the images, ...

The Aircraft Assignment problem is the problem of assigning flights to aircraft in such a way that some operational constraints are satisfied, and possibly that some objective function is optimized. We propose an approach to aircraft assignment which captures all operational constraints, including minimum connection times, airport curfews, maintenance, and preassigned activities. It also allows...

Tail-sitter unmanned aerial vehicles (UAVs) are promising vertical takeoff and landing (VTOL) UAV suitable for multi-missions but the road to commercialization of tail-sitter UAVs is tortuous. This paper aims provide a systematic design methodology present development process novel biplane quadrotor platform named TW10 accelerate this type UAV. All choices trade-offs in aerodynamics, structure,...

With recent advancements of computers and the advent of a search and optimization tool such as the genetic algorithm (GA), the ability to manipulate numerous aircraft design parameters in reasonable amount of time becomes feasible. It is from this standpoint that when one examines the aircraft design process, that is, the lengthy time and effort spent creating and integrating aerodynamics codes...

All impulsive waves (with no tails) in vacuum backgrounds of constant curvature (i.e. Minkowski, de Sitter and anti-de Sitter) are classified according to whether they are expanding or non-expanding. It is demonstrated that the expanding waves may, in some sense, be regarded as impulsive limits of Robinson–Trautman type N solutions.

A fixed-wing aircraft that is capable of low airspeed, high angle of attack flight can serve an expanded range of mission goals. A typical propeller-driven small unmanned aircraft can be equipped with an engine that provides greater thrust than airplane weight; in post-stall states, the aircraft then depends on propeller backwash over the tail for control moment generation. Due to this dependen...