Research And Simulation Of High And Low Orbit Flight Planning Methods For Low-thrust Spacecraft

Geosynchronous orbit(GEO)spacecraft has a wide range of applications in communications and navigation.In recent years,the orbit transfer technology of GEO spacecraft is changing from chemical fuel propulsion to electric propulsion type low-thrust technology,which has the characteristics of large specific impulse and good thrust controllability,which can effectively improve the load quality.This paper plans and optimizes the flight orbit of the low-thrust spacecraft from low orbit to high orbit,using SiROS to design a simulation system for the orbit transfer planning model,and realizes the simulation function of the high-low orbit transfer of the low-thrust spacecraft.The main research work is as follows:(1)Carry out basic theoretical research on synchronous orbit satellite path planning using electric propulsion low-thrust technology.The basic principles of electric propulsion,time representation method of space system,space coordinate system representation method and conversion,space object position description method,low-thrust spacecraft dynamics model and space environment influencing factors are studied.(2)Research on the optimization of the orbit transfer algorithm of the electric propulsion low-thrust satellite model.The orbit changing process of the low-thrust spacecraft model can be converted into a two-point boundary value problem in optimal control,and multiple shooting algorithms and annealing genetic algorithms are used to solve the problem.After research,the analytical results of the orbit transfer optimization of the low-thrust spacecraft model under special circumstances are obtained,and the initial orbit is optimized based on thenominal orbit algorithm.(3)Simulation study on orbit transfer optimization of low-thrust satellites.Based on the simulation software of the Space Intelligent Robot Operating System(SiROS),simulation modules such as the propulsion system configuration module,the initial nominal orbit planning module,the precise orbit design module,the orbit changing guidance control module,and the environmental force perturbation acceleration module were developed.Build typical low-thrust simulation deduction task scene algorithm models,such as GTO-GEO low-thrust orbit transfer simulation model,LEO-GEO low-thrust orbit transfer simulation model,non-coplanar circular orbit low-thrust transfer analytical solution model.Analyze the simulation results,each module can achieve the established functions,and the model simulation results are in line with expectations.