An air suspension to demonstrate the properties of torsion balances with fibers of zero length

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An air suspension to demonstrate the properties of torsion balances with fibers of zero length. / Gettings, Conner; Speake, Clive.

In: Review of Scientific Instruments, Vol. 91, No. 2, 025108, 07.02.2020, p. 025108-1 - 025108-7.

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@article{74ec9587f5ee44258426f21e9a11cee0,
title = "An air suspension to demonstrate the properties of torsion balances with fibers of zero length",
abstract = "We report on the design and characterization of an air-bearing suspension that has been constructed to highlight the properties of torsion balances with fibers of zero length. A float is levitated on this suspension, and its rotational and translational motion in the horizontal plane of the laboratory is controlled using magnetic actuators. We demonstrate the in situ electromagnetic tuning of the float's center-of-buoyancy to an accuracy of ±0.3 mm, which was limited by the noise in the air bearing. The rotational stiffness of the float, which is approximately zero by design, was also measured. We compare the observed behavior of the float with the predictions of a detailed model of the statics of the float-actuator system. Finally, we briefly discuss the application of these ideas and results to the construction of sensitive devices for the measurement of weak forces with short ranges.",
author = "Conner Gettings and Clive Speake",
year = "2020",
month = feb,
day = "7",
doi = "10.1063/1.5142373",
language = "English",
volume = "91",
pages = "025108--1 -- 025108--7",
journal = "Review of Scientific Instruments",
issn = "0034-6748",
publisher = "American Institute of Physics",
number = "2",

}

RIS

TY - JOUR

T1 - An air suspension to demonstrate the properties of torsion balances with fibers of zero length

AU - Gettings, Conner

AU - Speake, Clive

PY - 2020/2/7

Y1 - 2020/2/7

N2 - We report on the design and characterization of an air-bearing suspension that has been constructed to highlight the properties of torsion balances with fibers of zero length. A float is levitated on this suspension, and its rotational and translational motion in the horizontal plane of the laboratory is controlled using magnetic actuators. We demonstrate the in situ electromagnetic tuning of the float's center-of-buoyancy to an accuracy of ±0.3 mm, which was limited by the noise in the air bearing. The rotational stiffness of the float, which is approximately zero by design, was also measured. We compare the observed behavior of the float with the predictions of a detailed model of the statics of the float-actuator system. Finally, we briefly discuss the application of these ideas and results to the construction of sensitive devices for the measurement of weak forces with short ranges.

AB - We report on the design and characterization of an air-bearing suspension that has been constructed to highlight the properties of torsion balances with fibers of zero length. A float is levitated on this suspension, and its rotational and translational motion in the horizontal plane of the laboratory is controlled using magnetic actuators. We demonstrate the in situ electromagnetic tuning of the float's center-of-buoyancy to an accuracy of ±0.3 mm, which was limited by the noise in the air bearing. The rotational stiffness of the float, which is approximately zero by design, was also measured. We compare the observed behavior of the float with the predictions of a detailed model of the statics of the float-actuator system. Finally, we briefly discuss the application of these ideas and results to the construction of sensitive devices for the measurement of weak forces with short ranges.

UR - http://www.scopus.com/inward/record.url?scp=85079395950&partnerID=8YFLogxK

U2 - 10.1063/1.5142373

DO - 10.1063/1.5142373

M3 - Article

VL - 91

SP - 025108-1 - 025108-7

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

SN - 0034-6748

IS - 2

M1 - 025108

ER -