earticle

영어

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.