Research On Quick Orbital Maneuver Based On Adaptive Genetic Algorithm

Developing with the economy in China,the technology of space is also developing quikly,and the study on it is begining to enter the stage of spatial operation and space application,from the initial stage of entering and using of space. For example:rendezvous and docking in space,spatial rescue and spatial strike.The core theory of them is the technology of orbital maneuver,and the key stage is the long distance guidance stage of spacecraft, because of the most energy consumption and the longest time. Because of some spatial tasks,spacecraft must meet the requirements for precise direction and quik maneuver. Genetic algorithm is used widely because of its strong robusticity and its only need of design variables and objective function during caculating. The improved genetic algorithm—adaptive genetic algorithm has more better performance, The algorithm is based on the adaptive mutation operator and crossover operator and adjusts the crossover probability and mutation probability of each individual considering the influence of the generation and different individual fitness in every generation.The paper studys on the maneuvering strategies of long distance guidance stage and the corresponding maneuvering orbit.Firstly, the orbital maneuver model is established based on the theory of orbit dynamics considering the waiting stage in the tracing orbit , and a new mathematical model of orbital maneuver optimization is established based on the objective function of weighting time-energy.Secondly,a corresponding calculation program is desighed using the adaptive genetic algorithm,then,the corresponding maneuvering orbits and maneuvering strategies meeting the requirements of different time are obtained. Usually, geostationary satellite and rendezvous and docking in space are realized by orbital maneuver of a spacecraft in lower orbit. So the paper studys orbit maneuver considering influence of the initial lower orbit. The corresponding orbital maneuver model and mathematical model of orbital maneuver optimization is established,and new corresponding calculation program is desighed. Through some examples , the corresponding maneuvering orbits and maneuvering strategies meeting the requirements of different time are obtained ,and the value of application and feasibility of the study are illuminated.