The dynamics of a flexible air vehicle are typically described using an aeroservoelastic model which accounts for interaction between aerodynamics, structural dynamics, rigid body dynamics and control laws. These subsystems are individually modeled using a combination of theory and experimental data from various ground tests. For instance, the structural dynamics model can be obtained using a f...

Abstract Aiming at the critical flutter problem of wind turbine blades, which is between classical and stall flutter, a suppression scheme based on radial basis function (RBF) neural network friction compensation backstepping presented. The structure model typical 2D section bending twist spring-mass-damper, rotor variable exciter second-order with disturbance incorporated to control blade. A m...

CFD (Computational Fluid Dynamics) simulations appear to be strong competitor of the wind tunnel test which required scaled model and it is really expensive and time consuming tool in designing bridges therefore there is a strong claim to replace them with CFD. Analyses carried out for different deck cross sections by secondary development of commercial computational fluid dynamics software ANS...

In this thesis, a new methodology for flutter boundary prediction using experimental data is developed. Due to the complexity of the aircraft's structure and aerodynamics, it appeared necessary to rely on a simplified wing model to create a low order state space representation that would capture all the essential dynamics of a flutter problem. The methodology is the following: first, a low orde...

Abstract. In this work an alternative beam finite element for rapid time-domain flutter analysis of wings equipped with trailing edge control surfaces, generally distributed along the span, is presented. The aeroelastic proposed based on Euler-Bernoulli theory, De St. Venant torsion theory and two-dimensional unsteady aerodynamics. developed model attractive preliminary aero-servo-elastic analy...

Abstract Research on propeller performance has been reinvigorated by the development of new classes vehicles, ranging from electrically powered fixed-wing aircraft, to multi-rotor electrical Vertical Take-off/Landing (eVTOL) vehicles and tilt-rotor aircraft. These types aircraft utilise a range modern propellers, often with more advanced planforms features such as anhedral, operate in flight en...

The model-free control of aeroelastic vibrations of a non-linear 2-D wing-flap system operating in supersonic flight speed regimes is discussed in this paper. A novel continuous robust controller design yields asymptotically stable vibration suppression in both the pitching and plunging degrees of freedom using the flap deflection as a control input. The controller also ensures that all system ...