Vibration isolation platform for control moment gyroscopes on satellites

The vibration isolation platform of control moment gyroscopes (CMGs) on satellites is discussed. First, the theory of single-axis vibration isolation is presented and an isolation scheme for CMGs is put forward and applied to a satellite, which can provide an ultraquiet environment for optical payloads. Second, an integrated satellite dynamic model including the vibration isolation platform and pyramid configuration of the CMGs is built. The validity of this dynamic model is then verified by ADAMS. Third, the influence of the vibration isolation system on the attitude control system of the satellite is analyzed in detail and the appropriate parameters of the proportional-integral-derivative (PID) controller are selected. Finally, the attitude stabilization performance with the vibration isolation system is predicted by integrated simulation. The analysis and simulation results show that the vibration isolation platform can attenuate the disturbances to a certain extent - thus, improving the attitude stability - and when the vibration isolation platform is used, the closed-loop control system is conditionally stable, which means that the gain parameter of the PID controller should be within a range according to the root locus diagram.