Journal of the Korean Society of Mechanical Technology (한국기계기술학회지)

Korean Society of Mechanical Technology (한국기계기술학회)
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Development of a Test Platform for Variable Speed Control Moment Gyroscopes

가변속 제어모멘트자이로 테스트 플랫폼 개발

  • 진재현 (순천대학교 우주항공공학전공)
  • Received : 2014.05.01
  • Accepted : 2014.06.01
  • Published : 2014.06.30
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Abstract

The author introduces a test platform system that has been developed for variable-speed control moment gyroscopes(VCMGs). VCMGs are important actuators for spacecraft attitude control. The test platform consists of two VCMGs driven by servo motors and sensor modules. The control program has been coded by the NI LabVIEW. Accelerometers and gyros have been used to measure the attitude angle and angular speed of the platform. The 2nd order low pass filters have effectively filtered out noises from measurements. Wheel speeds and gimbal angles have been controlled satisfactory by PI control. Through some tests, moment generation has been verified. The moment has been generated as commanded. However, friction effect by a ball bearing, that supports the platform's rotation, has been not negligible. As further studies, friction reduction will be studied. In conclusion, this test platform will be used for engineering education and research.

Keywords

References

  1. Yoon, H., and Tsiotras, P., "Spacecraft adap tive attitude and power tracking with variable speed CMG," Journal of Guidance, Control, and Dynamics, Vol.25(6), pp.1081-1090, 2002. https://doi.org/10.2514/2.4987
  2. Richie, D., et. al., "Practical steering law for small satellite energy storage and attitude control," Journal of Guidance, Control, and Dynamics, Vol.32(6), pp.1898-1911, 2009. https://doi.org/10.2514/1.41968
  3. Takada, K., et. al., "Control moment gyro singularity avidance steering control based on singular surface cost function," Journal Guidance, Control, and Dynamics, Vol.33(5), pp.1442-1450, 2010 https://doi.org/10.2514/1.48381
  4. Kim, K., "A Study on the Virtual Proving Ground for Vehicle Dynamics Simulation," Journal of Korean Society for Mechanical Technology, Vol.11(4), pp.7-13, 2009.
  5. Na, H., et. al., "Verification of KAUSAT-2 satellite attitude control algorithm using KAUSatSIM simulator," Journal of The Korean Society for Aeronautical and Space Sciences, Vol.36(5), pp.514-523, 2008. https://doi.org/10.5139/JKSAS.2008.36.5.514
  6. Oh, S., "Optimal design for cross-section shape of composite material pipe," Journal of Korean Society for Mechanical Technology, Vol.9(2), pp.1-7, 2007. https://doi.org/10.17958/ksmt.09.4.200712.1