The author introduces a test platform system that has been developed for variable-speed controlmoment gyroscopes(VCMGs). VCMGs are important actuators for spacecraft attitude control. The testplatform consists of two VCMGs driven by servo motors and sensor modules. The control program hasbeen coded by the NI LabVIEW. Accelerometers and gyros have been used to measure the attitude angleand angular speed of the platform. The 2nd order low pass filters have effectively filtered out noisesfrom 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 ascommanded. However, friction effect by a ball bearing, that supports the platform’s rotation, has beennot negligible. As further studies, friction reduction will be studied. In conclusion, this test platform willbe used for engineering education and research.
목차
Abstract 1. 서론 2. 동작 원리 2.1 모멘트 발생원리 2.2 동역학 방정식 3. 테스트 플랫폼 구성 3.1 플랫폼과 휠 3.2 신호측정 3.3 모터제어 3.4 동작 테스트 및 결과 검토 4. 결론 부록 References
키워드
Variable speed control moment gyroscope(가변속 제어모멘트자이로)test platform(실험용 플랫폼)servo motor control(서보 모터 제어)