Study on Application of Transfer Path on Micro-vibration Test for Satellite

摘要

During the orbit process of spacecraft, various disturbance sources inside would cause micro-vibration response, which reduces its observation resolution and affects the captured quality; so, it is necessary to conduct micro-vibration tests on the ground to evaluate spacecraft' orbit performance. However, in the ground micro-vibration test, the noise generated by the internal disturbance of the spacecraft will produce a small response to structure due to the air effect that makes micro-vibration environment of high-resolution satellite on the ground is inconsistent with that in orbit. In order to research the influence of noise environment in the ground test, this paper analyzed CMG noise and its characteristics and used a small motor instead of CMG and designs satellite simulator on which micro-vibration test was designed based on transfer path analysis. Finally, the contribution of disturbance source was analyzed to evaluate the influence of CMG noise on micro-vibration test on the ground.