Abstract: Solar energy ion thruster is applied to achieve satellite orbittransfer from the earth synchronous transfer orbit (GTO) to geosynchronous orbit (GEO). The control strategy is designed via the feedback of latitude amplitude, and the ion thruster on/off time is optimized. The genetic algorithm (GA) based on graphic processing unit (GPU) is applied to optimize the transfer orbit. The results show that the closedloop controller completes the orbittransfer task. The fuel consumption of solar energy ion thruster is fairly less than that of the chemical fuel. Genetic algorithm based on GPU can greatly shorten the operating time.

Key words: ion thrust, orbittransfer, genetic algorithm based on graphic processing unit