Research on micro-vibration control and testing of FY-4 meteorological satellite

The spacecraft is developing towards ultra-high precision, ultra-high stability and hyper-spectral sensing directions. Micro-vibration in satellite platform can significant degrade the performance of payload, so that the micro-vibration analysis, control, measurement and experiment is very important to all kinds of high performance satellites. Considering the main vibration source on the FY-4 meteorological satellite and the requirement of the sensitive payload, the vibration suppression isolators are adopted to both vibration source and the sensitive payload. The parameters and sensitivity of the isolator unit are studied to give basic vibration suppression design guideline. Based on the isolator unit, the research on the hexapod vibration isolation chasis for flywheel is carried out theoritically and experimentally. For the sensitive payload vibration isolation, a three-point support using isolator and damper is proposed and the vibration isolation performance is studied. The vibration isolation of the interferometer can be seemed as second level isolation and can further reduce the vibration. The low-frequency suspension system and ultra-quiet laboratory are used to fulfill the micro-vibration experiment on ground. The on-orbit vibration measurement system is carried on FY-4 meteorological satellite and the real data show that the micro-vibration level can be suppressed to under 0.1 mg which totally meets the design requirement. The micro-vibration suppression and experiment technique are of great significance and can also be used to other similar satellite.