Real-Time 6DoF Guidance For of Spacecraft Proximity Maneuvering and Close Approach with a Tumbling Object

This paper deals with the development of a six degree of freedom guidance laws for the 20-state rendezvous model of two spacecraft, one of which is controlled and another considered to be passively tumbling. Solutions that minimize a series of performance indices are obtained for the problem of close approach, up to the point of contact. The method for spacecraft reorientation is developed based on a quaternion parameterization within the frame of the Inverse Dynamics in the Virtual Domain method. This proven approach for rapid trajectory generation exploits the concept of decoupling space and time. The advantages of the new full degreed of freedom guidance generation technique are demonstrated through simulated scenarios that employ two distinct concepts of closed-loop feedback with realistic settings and Monte Carlo simulations to assure algorithm performance while varying initial conditions.

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