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This paper deals with the problem of estimating the disturbances due a wind gust in a Quadrotor rotorcraft. A linear observer with integral action for estimating the disturbance due a wind is presented. Simulation and real-time result are presented for test performance of control law proposed. The real-time test was ralized in hover fly mode based on GPS sensor signal.
The concept, known as the Canard Rotor/Wing (CRW) unmanned aerial vehicle (UAV) combines the hover flight characteristic of a helicopter with high subsonic cruise of a fixed-wing aircraft. The longitudinal flight dynamic model of CRW was developed, and the trim result was derived in the full flight envelope. The linear model of CRW was derived by the Jacobian linear method, and it was nonlinearly...
In this paper, a tri-rotor aircraft is designed, which can vertically take off and land, and moreover fly forward with a high speed. Two fixed wings are added to the tri-rotor aircraft, therefore, the ability of high-speed forward flight is guaranteed. A controller is presented using back-stepping technique to achieve mode transition control of the aircraft. Finally, the theoretical result is confirmed...
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