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Visual Target Tracking and Relative Navigation for Unmanned Aerial Vehicles in a GPS-Denied Environment
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 Title & Authors
Visual Target Tracking and Relative Navigation for Unmanned Aerial Vehicles in a GPS-Denied Environment
Kim, Youngjoo; Jung, Wooyoung; Bang, Hyochoong;
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 Abstract
We present a system for the real-time visual relative navigation of a fixed-wing unmanned aerial vehicle in a GPS-denied environment. An extended Kalman filter is used to construct a vision-aided navigation system by fusing the image processing results with barometer and inertial sensor measurements. Using a mean-shift object tracking algorithm, an onboard vision system provides pixel measurements to the navigation filter. The filter is slightly modified to deal with delayed measurements from the vision system. The image processing algorithm and the navigation filter are verified by flight tests. The results show that the proposed aerial system is able to maintain circling around a target without using GPS data.
 Keywords
unmanned aerial vehicle;target tracking;relative navigation;delayed measurement;GPS-denied;vision-aided navigation;extended Kalman filter;
 Language
English
 Cited by
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