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In this paper, a completely numerical simulation model of a tilt rotor helicopter is established. Based on the hierarchical and modular modeling principles, the whole simulation model is finally realized on the Simulink platform. Then a sliding mode variable structure controller based on expansion state observer (ESO) is designed in order to realize the attitude control of this nonlinear and strong...
In this paper, a complete numerical simulation model of helicopter flight dynamics was established. The modeling of the main aerodynamic components of the helicopter and the aerodynamic interference are taken into account, and the modeling methods of the airfoil aerodynamic model, the induced velocity model and the waving movement model are discussed in detail. Based on the hierarchical and modular...
This paper concentrates on attitude control and position control of the hex-rotor Unmanned Aerial Vehicle (UAV) to achieve fixed-point hover. First, based on the Newton-Euler equations, the equations of motion are established in the inertial coordinate system. Then according to the characteristics of the hex-rotor UAV model, adaptive backstepping mode controllers are designed to realize the attitude...
In this paper, the tiltrotor aircraft model is established based on the multi-body dynamics method, in order to further improve the modeling accuracy, an augmented Pitt-Peters dynamic inflow model was used to establish the induced velocity model of the rotor. Based on the presented model, aiming at the uncertainties of the nonlinear dynamics of aircraft, the dynamic surface adaptive backstepping control...
In this paper, a flight dynamics model of a tiltrotor aircraft is developed used basic equations of motion. This model focuses on control aspect of tiltrotor and is able to show inherent tiltrotor characteristics; then a flight control system is designed used novel L1 adaptive control theory. The XV-15 tilt rotor aircraft is taken as an example to verify this modeling method and flight control system;...
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