Optimal Orbit Design of Returning from Moon
|School||Harbin Institute of Technology|
|Keywords||Lunar surface return Optimal orbit Maximum principle Months to transfer orbit Simulation|
With the development of space science and technology , human exploration of the moon is deepening China 's lunar exploration program is also being orderly and smooth implementation . The lunar surface return technology is a key technology for lunar exploration , how to design a return to the track , and how to make the return process as small as possible to achieve fuel consumption , to become China 's lunar exploration project three issues must be addressed . Firstly, on the lunar surface return the power rising segment of the track to explore . The main return to power for the spacecraft lunar surface ascent fuel consumption , considering the moon 's rotation , the Coriolis force , establish a dynamic model of the spacecraft in three-dimensional space , the moon . Burnup optimal indicators , to utilize pontryagin maximum principle , the spacecraft returned on the lunar surface the power ascent stage engine thrust direction optimal open-loop control law . Consider the end position and speed of constraint solving conjugate variables initial value , and ultimately obtained a feasible optimal trajectory of the spacecraft . Analysis and design of the January transfer orbit characteristics . The first transfer orbit of the characteristics of the preliminary analysis of the three-dimensional model based on the lunar impact ball concept and months . Then the preliminary design method of the January the land transfer orbit track . Finally, after the analysis of the major role perturbation accurate dynamic model design of months to transfer orbit .