Abstract
Weighing cells used in mass comparators are among the most sensitive force measurement devices existing, while being subject to high loads of e.g. 1 kg. The mechanical system needs to be extremely sensitive in measurement direction while being insensitive in all other directions. A disturbing factor is the tilt of the compliant mechanism relative to the gravity vector. In a small scale this tilt is time dependent and requires either an additional compensation mechanism or an insensitive configuration of the weighing cell itself. The present study focuses on the latter. A planar structure of a weighing cell is modeled by the use of a three dimensional finite element model. The gravity vector is represented in spherical coordinates, allowing the modeling of tilt about two axes. The resulting tilt reactions for the two axes are evaluated and compared.
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Acknowledgements
The authors thank the German Research Foundation (DFG) for the financial support of the project with the Grant No.: TH 845/7-1 and FR 2779/6-1
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Darnieder, M., Fröhlich, T., Theska, R. (2019). Tilt Sensitivity Modeling of a Monolithic Weighing Cell Structure. In: Kecskeméthy, A., Geu Flores, F., Carrera, E., Elias, D. (eds) Interdisciplinary Applications of Kinematics. Mechanisms and Machine Science, vol 71. Springer, Cham. https://doi.org/10.1007/978-3-030-16423-2_24
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DOI: https://doi.org/10.1007/978-3-030-16423-2_24
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Online ISBN: 978-3-030-16423-2
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