基于商用现货的高分辨卫星微振动抑制系统设计

In order to solve the problems of micro-vibration suppression of small satellites with high-resolution optical loads, a system design method was proposed herein by modifying the parameters of COTS and optimizing the installation of the vibration components. Different from other methods based on the knowledges of vibration mechanism, the micro vibration characteristics of the vibration components and tuning the parameters were directly analyzed by the proposed method, and a reasonable location of the vibration components was obtained by analyzing the dynamics response of the honeycomb sandwich structure using Newmark method. The effectiveness of the proposed method was verified by simulations and ground tests. Results show that the micro-vibration of the vibrating components is suppressed by 90% in the sensitive frequency bands, and the secondary mirror displacements caused by the micro-vibrations of the whole-star ground measurement do not exceed 0.04". Orbital experiments show that the satellite in-orbit micro-vibration environment meets the requirements of the camera. Thus the design method of the suppression system sets an example for other engineering practices in the future.