In the present paper, an efficient method for three dimensional aircraft pattern recognition is introduced. In this method, a set of simple area based features extracted from silhouette of aerial vehicles are used to recognize an aircraft type from its optical or infrared images taken by a CCD camera or a FLIR sensor. These images can be taken from any direction and distance relative to the fly...

An aircraft system noise study is presented for the Blended-Wing-Body (BWB) aircraft concept with three open rotor engines mounted on the upper surface of the airframe. It is shown that for such an aircraft, the cumulative Effective Perceived Noise Level (EPNL) is about 24 dB below the current aircraft noise regulations of Stage 4. While this makes the design acoustically viable in meeting the ...

To optimize communication with the Generic Modular Aircraft T-Tail (GMA-TT) unmanned aerial vehicle (UAV), electromagnetic (EM) simulations have been performed to predict the performance of two antenna types on the aircraft. Simulated far-field radiation patterns tell the amount of power radiated by the antennas and the aircraft together, taking into account blockage by the aircraft as well as ...

‎Let $M^n$ be an $n(ngeq 3)$-dimensional complete connected and‎ ‎oriented spacelike hypersurface in a de Sitter space or an anti-de‎ ‎Sitter space‎, ‎$S$ and $K$ be the squared norm of the second‎ ‎fundamental form and Gauss-Kronecker curvature of $M^n$‎. ‎If $S$ or‎ ‎$K$ is constant‎, ‎nonzero and $M^n$ has two distinct principal‎ ‎curvatures one of which is simple‎, ‎we obtain some‎ ‎charact...

In this work, an optimal and robust controller based on consolidating the PID H-infinity approach with model reference control is proposed. The proposed intended to accomplish a satisfactory transient response by including model. A Tail-Sitter VTOL UAV system used show effectiveness of controller. dynamic formulated using Euler method. To optimize design procedure, Black Hole Optimization (BHO)...

The estimation of aircraft vertical acceleration response to atmospheric turbulence is fundamental acceleration-based eddy dissipation rate (EDR) estimation. linear field approximation with the wind gradients effects utilized describe on civil aviation aircraft. To consider effects, was modeled by a cruciform assembly in this study. A based unsteady vortex lattice method (UVLM) proposed, which ...

Abstract In the frame of CleanSky 2 MONNALISA project, a wind-tunnel campaign is planned to test tail-plane model large passenger aircraft by using different measurement techniques. Wind-tunnel results obtained over systematic series geometries will be used thoroughly validate low-order numerical method based on physical modelling that developed in project evaluate non-linear aerodynamic charac...