Autonomous proximity operations such as active space debris removal and On-Orbit Servicing missions require advanced control algorithms on the part of the tracking satellite. In the case of an uncooperative and unknown target, it is helpful to determine both its relative attitude and position with a certain frequency and without the aid of optical markers in real time and ultimately to reconstruct it three-dimensionally.
Recently, different types of sensors and algorithms have been proposed and tested for this problem, among others by the research team of the Real-Time Attitude Control and On-Orbit Navigation Laboratory (RACOON-Lab) of the Technical University of Munich (TUM). In addition to the sensors and algorithms used, it was found that prevailing environmental conditions such as the angle of incidence of the sunlight relative to the camera play a decisive role in the reconstruction quality of the target object.
This thesis deals with the selection and quantification of these external influencing factors. For this purpose, a detailed parameter study was conducted at the RACOON-hardware-in-the-loop (HIL) simulator. In doing so, yet, only inspection scenarios were considered. The quality of the trajectories generated by two different tracking algorithms could be evaluated with the help of a metric developed in a previous work.
The results show a considerable dependence of the pose determination quality on the given illumination conditions, which is, however, also conditional on the used algorithm. The during this work generated database can now also function as a basis for further studies, which will allow other algorithms being integrated and compared in the future without the effort of new data generation.
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Autonomous proximity operations such as active space debris removal and On-Orbit Servicing missions require advanced control algorithms on the part of the tracking satellite. In the case of an uncooperative and unknown target, it is helpful to determine both its relative attitude and position with a certain frequency and without the aid of optical markers in real time and ultimately to reconstruct it three-dimensionally.
Recently, different types of sensors and algorithms have been proposed and...
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