A STUDY ON TRANSMISSION RATIO DISTORTION OF LEVER-TYPE FORCE STANDARD MACHINE USING FINITE ELEMENT METHOD

Hafid, Rachman Setiawan, Ghufron Zaid

Abstract

A study on transmission ratio distortion of 1 MN lever-type force standard machine has been performed using finite element method (FEM). The study involves the determination of deformation that occurs in the arms due to loading calculated using a software-based finite element method. The dimensions of the arms are taken from the manufacturing data. For verification purposes, the transmission ratio distortion resulted from the finite element modeling is compared to the linearity error calculated from results of a series of calibration using load cells as force transfer standards. The finite element simulation results show that the transmission ratio distortion is linear and amounted to approximately 270 ppm at maximum capacity. In addition, the study also concludes that the transmission ratio decreases with increasing forces. These results are in agreement with previous calibration performed by KRISS, Korea and acceptance test results from PTB Germany.

Keywords

transmission ratio distortion, force standard machine, lever-type force standard machine, finite element method, finite element modelling

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IMEKO-WC-2015-TC3-042.pdf

DOI

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IMEKO TC

TC3 - Measurement of Force, Mass, Torque, and Gravity

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