1 Control Systems Lab, School of Mechanical Engineering, National Technical University of Athens, Athens, Greece.
2 Space Exploration, Canadian Space Agency (CSA), Montreal, QC, Canada.
3 Intelligent Robotics and Autonomous Systems Lab, College of Engineering and Applied Science, University of Cincinnati, Cincinnati, OH, United States.
4 Institute of Robotics and Mechatronics, German Aerospace Center (DLR), Cologne, Germany.