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The wings of loitering unit could be unfolded in flight. In view of the model parameters uncertainty caused by the structural change, based on the vehicle's longitudinal and lateral motion equations, combined with the characteristics of ADRC, active disturbance rejection attitude controller is designed. Six degrees of freedom nonlinear simulation model is operated with Simulink and aerodynamic parameters...
A passivity-based quaternion feedback control strategy is presented for a hover system (quadrotor UAV test bed), which achieves asymptotic attitude regulation. The proposed control design incorporates the input voltage constraints inherent in practical UAV systems. A rigorous Lyapunov-based analysis is provided to prove asymptotic regulation of the hover system attitude to a desired set point. Computer...
This paper presents attitude recovery control for a quad tilt rotor UAV. The quad tilt rotor UAV has ability of flying with completely independent 3 DOF position and 3 DOF attitude control by changing the thrust directions. This type of UAV is expected to perform better response to the disturbance by virtue of the mechanism of changing the thrust directions compared to the conventional multi-rotor...
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