Active platform stabilization with a 6D seismometer

Amit Singh Ubhi; Leonid Prokhorov; Sam Cooper; Chiara Di Fronzo; John Bryant; David Hoyland; Alexandra Mitchell; Jesse Van Dongen; Conor Mow-Lowry; Alan Cumming; Giles Hammond; Denis Martynov

doi:10.1063/5.0118606

Active platform stabilization with a 6D seismometer

Amit Singh Ubhi^*
, Leonid Prokhorov
, Sam Cooper
, Chiara Di Fronzo
, John Bryant
, David Hoyland
, Alexandra Mitchell
, Jesse Van Dongen
, Conor Mow-Lowry
, Alan Cumming
, Giles Hammond
, Denis Martynov

^*Corresponding author for this work

(Astro)-Particles Physics

Research output: Contribution to Journal › Article › Academic › peer-review

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
Article number	174101
Pages (from-to)	1-6
Number of pages	6
Journal	Applied Physics Letters
Volume	121
Issue number	17
DOIs	https://doi.org/10.1063/5.0118606
Publication status	Published - 24 Oct 2022

Bibliographical note

Published online: 25 October 2022.

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
European Research Council
Science and Technology Facilities Council	ST/S002154/1, ST/V005634/1
University of Birmingham	2116965, ST/S000305/1
Engineering and Physical Sciences Research Council	EP/V008617/1, EP/V048872/1
Horizon 2020 Framework Programme	865816
UK Research and Innovation	ST/T006609/1, 2117289

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy
SDG 16 Peace, Justice and Strong Institutions

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10.1063/5.0118606

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Cite this

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title = "Active platform stabilization with a 6D seismometer",

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.",

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AU - Ubhi, Amit Singh

AU - Prokhorov, Leonid

AU - Cooper, Sam

AU - Fronzo, Chiara Di

AU - Bryant, John

AU - Hoyland, David

AU - Mitchell, Alexandra

AU - Van Dongen, Jesse

AU - Mow-Lowry, Conor

AU - Cumming, Alan

AU - Hammond, Giles

AU - Martynov, Denis

PY - 2022/10/24

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N2 - 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.

AB - 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.

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Active platform stabilization with a 6D seismometer

Abstract

Bibliographical note

Funding

UN SDGs

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