Close circumnavigation is an important function indispensable for servicing satellites. We discuss the bielliptic yaround maneuver by impulsive thrust control for a small and low cost servicing satellite ying around a target satellite. An optimal feedback control scheme for the thrust is proposed to maintain this trajectory in the presence of disturbances. The extended Kalman lter is employed t...

Due to the periodic nature of media playback, a multimedia server can service multiple clients simultaneously by proceeding in rounds, retrieving a fixed number of media units (e.g., video frames) for each client during each round. In this paper, we analyze the performance of a conservative and an aggressive policy for retrieving media units from an asynchronous disk array. In the conservative ...

Future international deep-space missions, such as a Gateway outpost at the Earth-Moon Libration L2 point (EML2), will require advanced robotic servicing with a very high level of autonomy. Realization of this autonomy should also increase the efficiency of ground operations and analyses by making it easier to plan and monitor operations under various mission constraints. While a great deal of r...

The demands of traditional industrial robotics differ significantly from those space robotics. While industry requires robots that can perform repetitive tasks with precision and speed, the environment needs to cope uncertainties, dynamics, communication delays or interruptions, similar human astronauts. These make a well-suited application for compliant behavior-based programming. Pose Target ...