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Attitude Control of Spacecraft by Two Variable-Speed Control Moment Gyros

2개의 가변속 제어모멘트자이로를 이용한 인공위성의 자세제어

  • Jin, Jaehyun (Division of Aerospace Engineering, Sunchon National University)
  • 진재현 (순천대학교 우주항공공학전공)
  • Received : 2015.09.05
  • Accepted : 2015.10.09
  • Published : 2015.11.01

Abstract

For the attitude control of spacecraft, two variable-speed control moment gyros are proposed as main actuators in the article. Since a variable-speed control moment gyro (VSCMG) makes two control torques (gyroscopic torque and reaction torque), two VSCMGs are sufficient for controlling 3-axes attitude. Additionally, there are no singular conditions for two non-parallel VSCMGs. Since gyroscopic torque is usually much greater than reaction torque, the control performances of approximately 3 axes may not be the same. However, several missions can be accomplished by controlling two axes. For such missions, a selective axes control method is proposed. The method selects two axes for a certain task and controls the attitude of the selected axes. For the remaining axis, angular speed is controlled for stabilization. A hardware-in-the-loop simulation has been used to test VSCMG modules and to verify the proposed method. Two VSCMGs can be alternative actuators for small satellites.

Keywords

References

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