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Designing Low-Thrust Trajectories Resilient to Missed Thrust Events via Indirect Methods and Expected Thrust Fraction
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Designing Low-Thrust Trajectories Resilient to Missed Thrust Events via Indirect Methods and Expected Thrust Fraction
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Journal Article
Designing Low-Thrust Trajectories Resilient to Missed Thrust Events via Indirect Methods and Expected Thrust Fraction
2025
Overview
Designing reliable trajectories for low-thrust missions faces challenges from potential Missed Thrust Events (MTEs). This paper presents an indirect method approach to generate MTE-resilient low-thrust trajectories by incorporating the Expected Thrust Fraction (ETF) model, which embeds MTE statistics into a deterministic framework. To overcome the numerical challenges associated with the indirect method, a regularized objective function with logarithmic homotopy terms is adopted in this paper, combined with shape-based reference trajectories and analytical least squares estimation techniques to ensure the robust convergence of the indirect method. The methodology is demonstrated on a fixed-time Earth-Mars rendezvous trajectory. Numerical results confirm the successful application of the ETF-informed indirect method, yielding a somewhat different optimal trajectory compared to traditional designs. This approach offers an efficient and robust tool for designing reliable low-thrust trajectories that proactively mitigate MTE risks.
Publisher
IOP Publishing
