In this article, a successive convexification algorithm is presented for real-time ascent trajectory replanning of a multistage launch vehicle experiencing nonfatal dynamic faults, including the faults of thrust, mass flow, and states. This problem presents a challenge for onboard real-time guidance applications due to its nonconvex constraints, such as the heat flux constraints, and the terminal orbit entry constraints, and to its nonlinearities introduced by atmospheric effects, multiphase mass-depletion dynamics, and free flight time. After proper convexification and relaxation, the general replanning strategy and algorithm of postfault multistage launch vehicle ascent trajectory replanning problems are presented, based on a compensation-based initialization method. Numerical simulations show that the presented algorithm converges reliably after only a small number of iterations, and has a good embedded performance, making it suitable for onboard real-time applications.
Successive Convexification for Ascent Trajectory Replanning of a Multistage Launch Vehicle Experiencing Nonfatal Dynamic Faults
IEEE Transactions on Aerospace and Electronic Systems ; 58 , 3 ; 2039-2052
2022-06-01
2217707 byte
Article (Journal)
Electronic Resource
English
Ascent Trajectory Optimization and Neighboring Optimal Guidance of Multistage Launch Vehicles
Springer Verlag | 2019
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