针对原子干涉仪中拉曼光反射镜对振动隔离的特殊要求,设计了一套低频隔振系统,采用两级被动隔振和 一级主动隔振的方案,同时对系统的机械结构和主动隔振反馈环路分别进行了详细的设计,最后用 Matlab 的 Simulink 模块进行了仿真,通过仿真结果显示该系统对 0.1～10 Hz的振动隔离度可以达到99%以上,表明该系统可以达到预期的隔振效果。

A low frequency vibration-isolating system was designed in order to meet the special requirement of vibration isolation of Raman laser reflector in atom interferometers. The system uses both two-step passive and one-step active isolations. Analysis of the mechanical structure and the feedback loop was carried out in detail. The performance of the system using Matlab Simulink software was assessed, and the result shows that it has an isolation ratio up to more than 99% for 0.1～10 Hz frequency range.