Abstract:

Orbit transfer and rendezvous, which are influenced orderly but modeled, constrained differently, are parts of a rendezvous task in space as two important phases. In general, that optimum is dealt with respectively. The research is done in the study of comprehensive optimization for the two phases of finite thrust with the impact of perturbation. At first, accurate models of orbit transfer and rendezvous are both brought out. In the model, the thrust magnitude is fixed. With the time for orbit transfer and rendezvous are both free, optimum index is the least flight time. Gauss pseudospectral method is chosen to transform the two continuous optimization control problems into nonlinear programming (NLP) problems. After setting up their contact, the two NLPs are solved as two phases of a NLP. As a consequence, comprehensive optimization for orbit transfer and rendezvous can be obtained. Finally, a simulation that is different planes orbit transfer and rendezvous of finite thrust with the impact of perturbation is analyzed through the algorithm mentioned above. The simulation and the obtained outcomes demonstrate that the method is fairly robust, quickly converged, satisfying all the constraints. The method also sets an example for solving the problems of this kind.