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In contrast to the conventional underactuated quadrotor, an over-actuated tilt-rotor quadcopter equipped with four tilting rotors can fly the arbitrary position trajectory while maintaining the desired attitude. We study the translational and rotational dynamic model for the tilt-rotor quadcopter associated with disturbances and uncertainties. Using the tilting rotors, we design two sliding mode controls...
The calculation for helicopter blades forces according to the designed parameters of a given aerofoil is an important but challenging problem. The more and more calculation approaches based on computer are introduced for tackle with this problem, such as CFD (computational fluid dynamics) and some airflow field analysis. In this paper, we mainly deal with the calculation approach for helicopter blades...
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