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This paper presents preliminary results on a complete translational system modeling and identification of a coaxial counter-rotating X8 octorotor. The objective is to assess the applicability of the widely-used quadrotor model to the coaxial eight-rotor aircraft. A real and representative model of the UAV is necessary to develop simulation tools for validation and to predict the system behavior. A...
In this paper, we study the dynamics and the control using visual features of a four rotor vertical take-off and landing (VTOL) vehicle known as the X4-flyer while stabilizing with quasi-stationary flight above a planar target. A new control strategy is presented using the homography matrix, it is based on saturation functions for bounding the orientation of the UAV (unmanned air vehicle) in order...
In this paper, we address the hover flight and speed regulation of a quadrotor rotorcraft to perform autonomous navigation. For this purpose, we have developed a vision system which estimates the altitude, the lateral position and the forward speed of the engine during flights. We show that the visual information allows the construction of control strategies for different kinds of flying modes: hover...
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