Sergio Pellegrino

Learn More
This paper presents the use of origami technique to construct a 3D spherical structure from a 2D parylene-C (PA-C) film with designed folding crease patterns. This origami technique is developed or intended for intraocular epiretinal implant application, which requires a " curved " electrode array to match the curvature of the macula. The folding method and(More)
A new set of attributes combining color and SURF-based histograms coupled with a SVM classifier to enhance visual based autonomous aerial navigation is proposed. These new features are used for region classification with aerial images in order to speed up the UAV (Unmanned Aerial Vehicles) localization performed by image matching using only reference images(More)
In recent years, as space structures have become large and require higher accuracy, composite honeycombs, which can reduce weight and have low thermal expansion, are in increasing demand. As observed in the design of antenna reflectors and rocket bodies, both flat and 3D-shaped cores are used in this field. However, these special honeycombs have high(More)
As part of a small satellite technology demonstration that will utilize autonomous assembly , reconfiguration, and docking technology to form the primary mirror for the mission's telescope payload, the mirror segments are required to modify and control their shape, in order to allow for imaging in different configurations. This paper focuses on the(More)
This paper considers motion planning for small satellites such as cubesats performing proximity operations in a several meters range of a target object. The main goal is to develop a principled methodology for handling the coupled effects of orbital dynamics , rotational and translational rigid body dynamics, underactuation and control bounds, and obstacle(More)
This paper explores the behavior of a self-deploying helical pantograph antenna for CubeSats. The helical pantograph concept is described along with concepts for attachment to the satellite bus. Finite element folding simulations of a pantograph consisting of eight helices are presented and compared to compaction force experiments done on a prototype(More)
All Rights Reserved iii To my family iv Acknowledgements The research that results in this thesis has only been possible with the constant support of my advisor, Professor Michael Ortiz. He has guided me throughout my studies with constant advice and patience. It was an honor to be one of his graduate students. I will never forget his rigor and enthusiasm(More)
  • 1