VIBRATIONAL ANALYSIS FOR THE NEXT GENERATION NPL KIBBLE BALANCE

J. Berry, P. Lovelock, I. A. Robinson, J. Urquhart

Abstract

Low uncertainty Kibble balance measurements require careful consideration of the effect of external sources of vibration. This paper compares vibrational modelling of the machine frame of the National Physical Laboratory’s next generation Kibble balance using three different software packages. The output of the modelling on the machine frame showed that the first modes of vibration were all above the design requirement of 60 Hz.<BR />The model was then enhanced to include the moving section of the balance modelled with two types of guidance mechanism. The output from the modelling showed a reduction in the resilience of the balance to lateral vibrations but the linkage type guidance mechanism was still resilient to induced vibrations at frequencies up to 50 Hz.

Keywords

Kibble balance; mass; vibration; modal analysis

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IMEKO-TC22-2022-077.pdf

DOI

10.21014/tc22-2022.077

IMEKO TC

TC22 - Vibration Measurement

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