In recent years

with the continuous development of space technology and space missions

the fast slew maneuvers of small satellites are required. Now research and produce small satellites which can slew fast is becoming the emphases in many countries. Adopt control moment gyro (SGCMG) which has a high torque output and control precision can upgrade the slew maneuvers of small satellites. Successfully developed SGCMGs to small satellites in outer space exploration will have an important national defense and military significance in China. This paper expatiated the basic theory of the SGCMG

designed SGCMG prototype

and had completed the SGCMG hardware - in - loop simulation experiment. The result indicates that the SGCMG which used to control small satellite attitude

can complete fast slew maneuvers in little time. This paper is for SGCMG’s small satellite applications in a few key issues and conducting research for the SGCMG in China on small satellites to provide the basis for practical engineering applications.