Les transferts orbitaux à faible poussée : optimalité et stabilisation

Abstract : This thesis presents a study of the low thrust two body control system and in particular orbital transfer problems. After a controllability study, we focus on the link between the optimal control in minimum time and the feedbacks built from the Jurdjevic-Quinn method. Numerical simulations show that the Jurdjevic-Quinn feedbacks can be close to the optimal command. In order to understand this property we study an average control system whose trajectories approximate these of low thrust systems. This technique allows us to give a positive answer to a conjecture on the asymptotic behavior of the minimum time. Moreover it is a promising way to build an efficient Lyapunov function associated to the Jurdjevic-Quinn method: a feedback close to the optimal control
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Theses
Automatic. École Nationale Supérieure des Mines de Paris, 2007. French


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Submitted on : Thursday, March 6, 2008 - 11:56:39 AM
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Alex Bombrun. Les transferts orbitaux à faible poussée : optimalité et stabilisation. Automatic. École Nationale Supérieure des Mines de Paris, 2007. French. <tel-00261156>

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