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Showing 1 to 7 of 7 for “"hybrid optimal control"”.
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Automated Design of Multiphase Space Missions Using Hybrid Optimal Control
… use by solving the associated continuous optimal control problem. This strategy, however, will most likely yield a sub-optimal solution, as the problem is sophisticated for several reasons. For example, the number of events in the optimal mission structure is not known a priori and the …
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Technology for the Solution of Hybrid Optimal Control Problems in Astronautics
… problems in spacecraft mission design are hybrid optimal control problems (HOCP) however there are only a small number of successful solutions of such problems in the literature because the problems are so challenging. The difficulty stems partly from the size of the problems and the fact …
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Spacecraft trajectory design utilizing resonance orbits in a hybrid optimal control framework
… tool in order to create solutions of optimal impulsive spacecraft trajectories in multi-body environments. Previous work using this tool has shown the ability to use other key dynamical structures of the circular restricted three-body problem (e.g. Euler-Lagrange point orbits and their …
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Automated global optimization of low-energy trajectories using a hybrid optimal control framework
… and solved using an NLP solver to obtain locally optimal solutions at best. This process is time consuming and requires human input for seeding initial guesses. It also does not guarantee convergence or the existence of feasible or locally optimal solutions; and if successful, it generates a …
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Computational Methods for Optimal Control of Hybrid Systems
This thesis aims to find algorithms for optimal control of hybrid systems and explore them in sufficient detail to be able to implement the ideas in computational tools. By hybrid systems is meant systems with interacting continuous and discrete dynamics. Code for computations has been developed in …
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Automated trajectory planning for multiple-flyby interplanetary missions
… mission planning problems may be formulated as hybrid optimal control problems (HOCP), i.e. problems that include both real-valued variables and categorical variables. In interplanetary trajectory design problems the categorical variables will typically specify the sequence of planets at which …
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Interplanetary Trajectory Optimization with Automated Fly-By Sequences
… missions, such as component organization, control algorithms, and trajectories, can be optimized using a variety of algorithms or solvers. Each solver has intrinsic strengths and weaknesses when applied to a given optimization problem. One way to mitigate limitations is to combine different …