tracking law designed for future mars entry missions is investigated in this article. For precision landing, the nonlinear entry dynamics, complex uncertainties and input saturation constraints are unavoidable problem...
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ISBN:
(纸本)9781479947249
tracking law designed for future mars entry missions is investigated in this article. For precision landing, the nonlinear entry dynamics, complex uncertainties and input saturation constraints are unavoidable problems. Facing these challenges, the mars entrytrajectory tracking scheme via constrained multi-model predictive control(CMPC) is employed. The CMPC is made up of some constrainedpredictivecontrol(CPC) in different time domain during the mars entry mission. Each constrainedpredictivecontroller consists of a linearized prediction model(obtained by linearizing at different operating point), feedback correction for active model mismatch rejection caused by the complex uncertainties, and constrained rolling optimization for a smooth control input under a saturation constraint. monte carlo simulations demonstrate the effectiveness and excellence of the proposed method under the saturation constraint of input and uncertainties of initial state and aerodynamic parameters such as atmospheric density, ballistic coefficient and lift-to-drag ratio.
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