一种六自由度干涉式惯性隔离系统
A 6D interferometric inertial isolation system
摘要：
我们提出了一种新的惯性隔离计划的基础上六度的自由度（6D）干涉传感的一个单一的参考质量。与最先进的地震仪相比，它能够在100 mHz下将惯性运动减少两个数量级以上。这将大大提高引力波探测器的低频灵敏度。该方案本质上是两阶段的，参考质量软悬浮在平台内，以隔离，这本身是悬挂在地面上。平台相对于参考质量保持恒定，并且该闭环控制有效地将参考质量的低加速度噪声传递到平台。高环路增益还降低了软悬挂机构和干涉测量感测中的非线性耦合和动态范围要求。
英文摘要：
We present a novel inertial-isolation scheme based on six degree-of-freedom (6D) interferometric sensing of a single reference mass. It is capable of reducing inertial motion by more than two orders of magnitude at 100\,mHz compared with what is achievable with state-of-the-art seismometers. This will enable substantial improvements in the low-frequency sensitivity of gravitational-wave detectors. The scheme is inherently two-stage, the reference mass is softly suspended within the platform to be isolated, which is itself suspended from the ground. The platform is held constant relative to the reference mass and this closed-loop control effectively transfers the low acceleration-noise of the reference mass to the platform. A high loop gain also reduces non-linear couplings and dynamic range requirements in the soft-suspension mechanics and the interferometric sensing.
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