Abstract
A measurement flexure calibration set-up is presented in this paper. The measurement flexures under test are part of a new 5 MN · m standard torque machine measurement system at the PTB. The calibration set-up can create transversal forces up to 200 N and bending moments up to 100 N · m and respectively up to 150 N · m torque moments simultaneously. The measurement uncertainty budget of the set-up is investigated in a theoretical analysis.
Highlights
At the PTB a new 5 MN·m standard torque machine (STM) is built to calibrate torque transducers [1]
The 5 MN·m STM consists of an actuator side for generating calibration moments and a measurement side for measuring the applied load
The measurement flexures (MF) calibration scenario of the set-up must match the applied load combination occurring in the 5 MN·m STM
Summary
At the PTB a new 5 MN·m standard torque machine (STM) is built to calibrate torque transducers [1]. The 5 MN·m STM consists of an actuator side for generating calibration moments (torque as well as bending moments) and a measurement side for measuring the applied load. Both sides have a lever to which a torque transducer under test is flange-mounted. Due to MF’s displacement, parasitic forces and moments are inevitable. The knowledge of these moments and forces are essential to define the overall measurement uncertainty of the standard torque machine. Critical influences on the measurement uncertainty must be identified and concepts or measurements must be defined to reduce key measurement uncertainty influences
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