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Quadrotor helicopter is an increasingly popular rotorcraft platform for unmanned aerial vehicle (UAV) study. Development of a mathematical model with accurate model parameters for quadrotor is extremely beneficial to control the system. But accurate measurement of numerous vehicle parameters would be especially challenging. In this paper, a system identification method for the quadrotor model parameter...
Aiming at the problem of an emergency landing of unpowered aircraft, this paper presents the design of landing trajectory. Firstly, the effect of the shear wind for the flight path is considered. Secondly, the problem of unpowered flight's landing is modeled by the time-optimal control method. The landing trajectory is divided into four piecewise trajectories and the characteristics of each are determined...
A visual-based auxiliary navigation method using augmented reality is an immersive navigation interface with virtual navigation and decision-making information superimposed on the video of real environment. It can provide the operator with more information to behave proactively in order to forestall future problems, with less stress or effort, and to increase the successful rate of UAV missions. The...
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