Vision-Based Loitering Over a Target for a Fixed-Wing UAV

Abstract For a fixed-wing Unmanned Aerial Vehicle (UAV) equipped with a gimbaled camera, we consider the problem of tracking a visual target while simultaneously bringing the UAV to orbit on a circular trajectory centered above the target. To achieve this kind of loitering behavior, we propose a feedback control method that is inspired by image-based visual servoing and makes use of a backstepping technique. Through this approach, we are able to obtain a control law that requires only image and proprioceptive data. A formal proof of convergence and a set of validating numerical trials are provided, including a realistic simulation on a commercial UAV.

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