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• W2783103280 abstract "Robustness and reliability of the designed trajectory are crucial for flight performance of launch vehicles. In this paper, robust trajectory design optimization of a typical LV is proposed. Two formulations of robust trajectory design optimization problem using single-objective and multi-objective optimization concept are presented. Both aleatory and epistemic uncertainties in model parameters and operational environment characteristics are incorporated in the problem, respectively. In order to uncertainty propagation and analysis, the improved Latin hypercube sampling is utilized. A comparison between robustness of the single-objective robust trajectory design optimization solution and deterministic design optimization solution is illustrated using probability density functions. The multi-objective robust trajectory design optimization is executed through NSGA-II and a set of feasible design points with a good spread is obtained in the form of Pareto frontier. The final Pareto frontier presents a trade-off between two conflicting objectives namely maximizing injection robustness and minimizing gross lift-off mass of launch vehicle. The resulted Pareto frontier of the multi-objective robust trajectory design optimization shows that with 1% increase in gross mass, the robustness of the design point to the considered uncertainties can be increased about 80%. Also, numerical simulation results show that the multi-objective formulation is a necessary approach to achieve a good trade-off between optimality and robustness." @default.
• W2783103280 created "2018-01-26" @default.
• W2783103280 creator A5002433090 @default.
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• W2783103280 date "2018-01-15" @default.
• W2783103280 modified "2023-10-16" @default.
• W2783103280 title "Robust ascent trajectory design and optimization of a typical launch vehicle" @default.
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• W2783103280 doi "https://doi.org/10.1177/0954406217753460" @default.
• W2783103280 hasPublicationYear "2018" @default.
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