우주기술과 응용 (Journal of Space Technology and Applications)

  • 제3권4호
  • /
  • Pages.322-332
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  • 2023
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  • 2799-3213(pISSN)
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  • 2765-7469(eISSN)
한국우주과학회 (The Korean Space Science Society)
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Highly Agile Actuator Development Status of an 800 mNm Control Moment Gyro (CMG)

  • 투고 : 2023.10.14
  • 심사 : 2023.10.31
  • 발행 : 2023.11.30
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초록

Satellite attitude-control actuators are equipped with a reaction wheel for three-axis attitude control. The reaction wheel rotates a motor inside the actuator to generate torque in the vector direction. When using the reaction wheel, there are restrictions on the torque values generated as the motor rotates. The torque value of the reaction wheels mounted on small satellites is approximately 10 mNm, and high values are not used. Therefore, three-axis attitude control of a small satellite is possible using a reaction wheel, but this method is not suitable for missions that require rapid attitude control at a specific time. As a technology to overcome the small torque value of the reaction wheel, the control moment gyro (CMG) is currently in wide use as a rapid attitude-control actuator in space satellites. The CMG has an internal gimbal mounted at a right angle to the rotation motor and generates a large torque value. In general, when the gimbal operates, a torque value approximately 100 times greater is generated, making it suitable for rapid posture maneuvering. Currently, we are developing a technology for mounting a controlled moment gyro on a small satellite, and here we share the development status of an 800 mNm CMG.

키워드

과제정보

This work was supported by the program of the CMG-based Small Satellite Agile Attitude Control Technology funded by the Hanwha Systems of Korea.

참고문헌

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