CHANGO: A Software Tool for Boost Stage Guidance of the Space Launch System Exploration Mission 1

Ahmad, Naeem ; Hawkins, Matt ; Von Der Porten, Paul

关键词: SPACE LAUNCH SYSTEM (SLS);    EXPLORATION MISSION-1;    LAUNCHING;    TRAJECTORY OPTIMIZATION;    APPLICATIONS PROGRAMS (COMPUTERS);    WIND MEASUREMENT;    METEOROLOGY;   

RP-ID  :  M19-7550

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

The Space Launch System (SLS) Exploration Mission 1 (EM-1) test flight will use open-loop guidance for Boost Stage (BS) flight. A table of attitude commands as a function of altitude, called the chi table, will be loaded onto the flight computers. The chi table will be generated using the measured winds on launch day by the Chi Angle Optimizer (CHANGO) software tool. Details of CHANGO’s design are given, including a Three Degrees-of-Freedom (3-DOF) simulation and a numerical minimization routine. CHANGO’s use in launch day operations is also described.