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Vision Based MPC on a Low-Cost Quad-Copter

Author(s):

Christian Saner
Conference/Journal:

Master Thesis, FS13 (10289)
Abstract:

This work aims for autonomous exploration in an unknown indoor environment with a quad-copter. In this scenario, no external sensors such as GPS, motion capture system or arti cial landmarks are available. Therefore, position and orientation estimation must be provided by on-board processing of proprioceptive and exteroceptive sensors. The system developed in this thesis is based on an AR.Drone 2.0 frame. The on-board electronics are replaced by the PX4 system provided by PIXHAWK. An Odroid U2 board provides the computational power for image processing, sensor fusion and model predictive control. A newly developed visual odometry algorithm that is able to process 40 frames per second is used. Since the state estimation is based on visual information it is crucial that the control is not too aggressive, ensuring a stable camera image at all times. Therefore an MPC with state constraints is introduced to maintain limits in the camera movement and therefore guarantee the required image quality. The experiments conducted reveal that preprogrammed ight gures such as squares and eight-shapes can be tracked robustly. The precision is comparable to results in related work. The developed system constitutes a good basis for further research in autonomous exploration. iv

Year:

2013
Type of Publication:

(12)Diploma/Master Thesis
Supervisor:

S. M. Huck

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% Autogenerated BibTeX entry
@PhdThesis { Xxx:2013:IFA_4542
}
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