Measurement uncertainty analysis of a measurement flexure hinge in a torque standard machine

Author:

Geva Kai,Kahmann Holger,Schlegel Christian,Kumme Rolf

Abstract

Abstract. An alternative method to using strain gauges to measure FT (please see Appendix A for a list of definitions) and TM under a static multi-component load by using a hinge flexure (also called measurement flexure or MF) is presented. Its usage in the 5 MN m torque standard machine (TSM) at the Physikalisch-Technische Bundesanstalt (PTB) to detect calibration torque moment shunts is described. The working principle consists of a displacement measurement by an interferometer and the determination of the MF stiffness in a special CSU. Essential measurement uncertainty influences, such as stiffness determination and measurement conditions, are discussed and quantified. The measurement uncertainty budget for this measurement principle is presented. A FE validation for the MF is discussed.

Funder

Bundesministerium für Wirtschaft und Energie

Publisher

Copernicus GmbH

Subject

Electrical and Electronic Engineering,Instrumentation

Reference6 articles.

1. Baumgarten, S.: 2.1.3 – Mehrkomponentenmesseinrichtung für Kräfte bis 1 MN und Drehmoment bis 2 kN m – Funktionsprinzip und Messunsicherheitsbudget, in: Tagungsband, AMA Service GmbH, Von-Münchhausen-Str. 49, 31515 Wunstorf, Germany, 107–111, https://doi.org/10.5162/sensoren2016/2.1.3, 2016. a

2. Cui, J., Kumme, R., and Kahmann, H.: A new method for the calibration of strain cylinders using laser interferometry, ACTA IMEKO, 8, 25–32, https://doi.org/10.21014/acta_imeko.v8i1.659, 2019. a

3. Geva, K., Kahmann, H., Schlegel, C., and Kumme, R.: Analysis of the measurement uncertainty of a new measurement flexure calibration set-up, ACTA IMEKO, 9, 173–178, https://doi.org/10.21014/acta_imeko.v9i5.963, 2020. a

4. Geva, K., Kahmann, H., Schlegel, C., and Kumme, R.: Data set for measurement uncertainty analysis of a measurement flexure hinge in a torque standard machine, PTB Open Access Repository [data set], https://doi.org/10.7795/710.20220715, 2022. a

5. Kahmann, H., Schlegel, C., Kumme, R., and Röske, D.: Principle and design of a 5 MN m torque standard machine, in: Proceedings of IMEKO 2017 TC3, https://www.imeko.org/publications/tc3-2017/IMEKO-TC3-2017-037.pdf (last access: 17 June 2022), 2017. a

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