Global feed-forward vibration isolation in a km scale interferometer
Global feed-forward vibration isolation in a km scale interferometer
复制标题
公里级干涉仪中的全局前馈隔振
DOI：
10.1088/0264-9381/29/21/215008
复制
发表时间：
2012
影响因子：
3.5
通讯作者：
R. Adhikari
中科院分区：
文献类型：
--
作者：
R. Derosa;J. Driggers;D. Atkinson;H. Miao;V. Frolov;M. Landry;J. Giaime;R. Adhikari
利用地震仪网络和一组最优滤波器，我们实现了一种前馈控制技术，以最小化地震对激光干涉仪引力波天文台干涉仪的多个干涉自由度的贡献。利用Levinson-Durbin递归关系构造滤波器，逼近最优维纳滤波器。通过将干涉仪反馈信号的均方根值降低到~ 10 Hz以下，我们提高了引力波探测器联合网络的稳定性和占空比。通过抑制大的控制力和镜像运动，我们极大地降低了引力波信号流中的非高斯瞬态速率。
Using a network of seismometers and sets of optimal filters, we implemented a feed-forward control technique to minimize the seismic contribution to multiple interferometric degrees of freedom of the Laser Interferometer Gravitational-wave Observatory interferometers. The filters are constructed by using the Levinson–Durbin recursion relation to approximate the optimal Wiener filter. By reducing the RMS of the interferometer feedback signals below ∼10 Hz, we have improved the stability and duty cycle of the joint network of gravitational wave detectors. By suppressing the large control forces and mirror motions, we have dramatically reduced the rate of non-Gaussian transients in the gravitational wave signal stream.