Laboratory Experimentation of Autonomous Spacecraft Approach and Docking to a Collaborative Target

Abstract
Eight cold-gas on-off thrusters are used for the translation of the chaser vehicle. They are commanded using a nonlinearcontrolalgorithmbasedonSchmitttriggers.Furthermore,areactionwheelisusedforthevehiclerotation with a proportional derivative linear control. Experimental results are presented of both an autonomous proximity maneuver and an autonomous docking of the chaser simulator to the nonfloating target. The presented results validate the proposed estimation and control methods and demonstrate the capability of the test bed.
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