Research Of Orbit Extrapolation For On-orbit Service Object Based On Scilab And Xcos

Orbit extrapolation simulation of on-orbit service object(such as satellites and space stations)is of great significance for fast understanding of space conditions and completion of new space launch missions.In this paper,studying the orbit extrapolation algorithm model,and designing the simulation system using Scilab/Xcos for the orbit extrapolation algorithm model.Achieving simulation calculation function of the orbit extrapolation model.The main research work is as follows:(1)Basic theoretical analysis of orbit extrapolation for on-orbit service object.Studying space system time representation method,space coordinate system representation method and transformation,space object position description method and space environmental impact factors.(2)Analysis and Research on extrapolation calculation model of on-orbit service object.Analyzing and studying the calculation methods of Kepler model,J2 model,NORAD model in analytical method,numerical method and establishing mathematical model(3)Studying orbit extrapolation simulation of on-orbit service object.The Kepler model,J2 model,NORAD model in analytical method and HPOP model in numerical method are encapsulated into modules and integrated into Xcos toolbox by using Scilab/Xcos simulation soffware.Buliding four kinds of orbit extrapolation models.Based on the above research,the orbit extrapolation simulation system under Scilab/Xcos platform is designed.In this paper,four kinds of orbit extrapolation models in the system are extrapolated and simulated.By comparing the simulation results with those of STK software under the same conditions,it is found that the calculation accuracy of the orbit extrapolation model studied in this paper meets the standard.The SGP4 model in NORAD is extrapolated in batches,and the orbit extrapolation results are stored in HBase database for reference,and at the same time it can provide data support for visual simulation system.The orbital extrapolation calculation of the on-orbit service object is carried out and the flight status of the on-orbit service object is displayed in the visual simulation system using simulation data.After checking by a space research institute,the contents of this paper and the results obtained meet the expected requirements.