Abstract
We demonstrate the control scheme of an active platform with a six degree of freedom (6D) seismometer. The inertial sensor simultaneously measures translational and tilt degrees of freedom of the platform and does not require any additional sensors for the stabilization. We show that a feedforward cancelation scheme can efficiently decouple tilt-to-horizontal coupling of the seismometer in the digital control scheme. We stabilize the platform in the frequency band from 250 mHz up to 10 Hz in the translational (X, Y) degrees of freedom and achieve a suppression factor of 100 around 1 Hz. Further suppression of ground vibrations was limited by the non-linear response of the piezo actuators of the platform and by its limited range (5 μm). In this paper, we discuss the 6D seismometer, its control scheme, and the limitations of the test bed.
Original language | English |
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Article number | 174101 |
Pages (from-to) | 1-6 |
Number of pages | 6 |
Journal | Applied Physics Letters |
Volume | 121 |
Issue number | 17 |
DOIs | |
Publication status | Published - 24 Oct 2022 |
Bibliographical note
Funding Information:We thank Rich Mittleman for his valuable internal review and also members of the LIGO SWG groups for useful discussions. The authors acknowledge the support of the Institute for Gravitational Wave Astronomy at the University of Birmingham, STFC 2018 Equipment Call ST/S002154/1, STFC “Astrophysics at the University of Birmingham” under Grant No. ST/S000305/1, and STFC QTFP “Quantum-enhanced interferometry for new physics” under Grant No. ST/T006609/1. A.S.U. is supported by STFC studentship Nos. 2117289 and 2116965. A.M. contributed in the design of the coil magnet actuation scheme for damping of the test mass. A.M., J.V.D., and C.M.L. are funded by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant Agreement No. 865816).
Publisher Copyright:
© 2022 Author(s).
Funding
We thank Rich Mittleman for his valuable internal review and also members of the LIGO SWG groups for useful discussions. The authors acknowledge the support of the Institute for Gravitational Wave Astronomy at the University of Birmingham, STFC 2018 Equipment Call ST/S002154/1, STFC “Astrophysics at the University of Birmingham” under Grant No. ST/S000305/1, and STFC QTFP “Quantum-enhanced interferometry for new physics” under Grant No. ST/T006609/1. A.S.U. is supported by STFC studentship Nos. 2117289 and 2116965. A.M. contributed in the design of the coil magnet actuation scheme for damping of the test mass. A.M., J.V.D., and C.M.L. are funded by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant Agreement No. 865816).
Funders | Funder number |
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Horizon 2020 Framework Programme | 865816 |
Horizon 2020 Framework Programme | |
Science and Technology Facilities Council | ST/S002154/1 |
Science and Technology Facilities Council | |
European Research Council | |
University of Birmingham | 2116965, ST/T006609/1, 2117289, ST/S000305/1 |
University of Birmingham |