The Micro-Vibration Suppression Of The Satellite-Borne Equipment Based On The Stewart Platform

The vibration is produced during the running of Spaceborne operation mechanism in orbit which is the main cause for the failure of the spaceborne equipment. For general spaceborne equipments, simple vibration isolation can meet the requirements of its low vibration mechanics environment, but for the high precision spaceborne equipment, it will not work properly, even under the small perturbation. Therefore, the vibration suppression of the micro-vibration mechanics environment is necessary.In this paper, first of all, the dynamics model of Stewart platform passive isolation system is established with Newton-Euler method. The dynamic characteristics of the passive isolation system and its effect on the vibration suppression of the Stewart platform are analyzed by numerical method. The results show that the passive isolation system of the Stewart platform can effectively suppress the micro-vibration. Secondly, the nonlinear energy sink(NES) is used to optimize the passive vibration isolation system of the Stewart platform. Numerical analysis show that the nonlinear energy sink(NES) can improve the micro-vibration suppression effect of Stewart platform system, especially in The linear direction along the z axis, the micro-vibration suppression effect is better. At last, the effect of the spherical joint clearance on the vibration suppression effect of Stewart platform is briefly analyzed. The spherical joint clearance increases the transfer rate between the degrees of freedom, reduce the vibration suppression effect to some extent.