Optimal switching strategy for radially accelerated trajectories |
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Authors: | Alessandro A Quarta Giovanni Mengali |
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Institution: | 1.Dipartimento di Ingegneria Aerospaziale,University of Pisa,Pisa,Italy |
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Abstract: | This paper studies the problem of a spacecraft subject to an outward radial thrust, with constant modulus, that may be switched
on or off at suitable time intervals. The problem is to find the optimal strategy to guarantee the possibility of transferring
the spacecraft from an initial to a final position in a given time interval using the least amount of thrust level. The problem
is solved in an optimal framework, using an indirect approach. A number of different mission scenarios are studied in detail:
escape missions, flyby missions and rendezvous missions. In the latter case the spacecraft uses a hybrid system comprising
an high thrust propulsion system for the final impulsive maneuver. The optimal switching strategy allows one to substantially
decrease the thrust level when compared to the continuous case (without thrust modulation). |
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