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Commande et commande tolérante aux fautes par modes glissants : application à une mission de rendez-vous en orbite circulaire

Abstract : Increasing attention has grown with regards to Sliding Mode Controllers (SMC). In order to reduce the so-called chattering effect, the Super-Twisting Algorithm (STA) has been proposed, recently. In this work, a controller based on the STA in a backstepping setup, is proposed for spacecraft rendezvous in a circular orbit. A key feature is that the chaser is not treated as a point mass, given that the effects of the flexible modes and propellant sloshing phenomena are considered. The results obtained are taken further, given that the guarantee of robustness against perturbations is not enough when it comes to critical systems, through the second ordersliding mode controllers technique. It is shown that the technique enables to solve to problem of fault tolerant control. The solution is based on the Generalized Super-Twisting Algorithm (GSTA) with an anti-windup strategy and a nonlinear observer and the dual quaternion formalism. The main reason of employing a GSTA is because it offers more robustness against state dependentperturbations (sloshing phenomena and flexible modes) than the STA. In addition, with the help of the anti-windup strategy, the control law does not saturate the thrusters, avoiding instablity when faults occur. The proposed solution is evaluated through a simulation campaign in a high-fidelity non-linear simulator, and mission oriented criteria demonstrate its potential.
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Submitted on : Friday, November 6, 2020 - 11:58:13 AM
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  • HAL Id : tel-02992196, version 1

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Jazmin Zenteno Torres. Commande et commande tolérante aux fautes par modes glissants : application à une mission de rendez-vous en orbite circulaire. Automatic Control Engineering. Université de Bordeaux, 2020. English. ⟨NNT : 2020BORD0063⟩. ⟨tel-02992196⟩

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