| Abstract: | The research on Yuanzheng upper stage started from 2009,and 6 years later,the first launch recorded on March 30th in 2015. So far, the Yuanzheng upper stage has developed into a series. About 20 missions have been successfully completed by Yuanzheng series, and more than 40 large-scale spacecrafts have been sent into MEO/GEO/IGSO/SSO or reentry orbit in high precision. It ensures the striding development of space transportation system.This paper reviews the development and progress of Yuanzheng upper stage technology in past 10 years, analyzes the advantages and the main key technologies in the process. Finally, the subsequent development suggestions of upper stage technology in China are put forward. |
