An Optimal Design Strategy for Orbital Maneuver with Constant Thrust
Aiming at the optimal design of spacecraft orbital maneuvering with constant thrust,a orbital maneuvering dynamic model of spacecraft in three-dimensional space is derived,and the parameters of the dynamic model are dimensionless to prevent the singularity in the calculation process.An optimal design strategy of waiting in orbit firstly and then orbital maneuvering is proposed.The spacecraft first flies unpowered in its initial orbit for a period of time to wait,and then searches an optimal moment to apply thrust before orbital maneuvering.The proposed strategy optimizes the optimal waiting time of the spacecraft and the optimal control during orbital maneuvering as a whole.The multiple direct shooting method based on piecewise integration technology transforms the original complex trajectory optimal design problem into a nonlinear programming problem for each sub-time interval,and the interior point method is used to solve it.The effectiveness of the proposed optimal design strategy is verified by simulation.
Three-dimensional space orbitOrbital waitingOrbital maneuverConstant thrust
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