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1 Metrology and Measurement Systems

1 2022

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Calibration of reference torque transducer in one direction and use of its cubic coefficients in both directions with improved interpolation error

Khaled K. M., Osman Seif M.

Metrology and Measurement Systems

2022

Vol. 29, nr 3

539--551

The current research work presents an investigation into use of the fitting coefficients resulting from the cubic curve fitting of the torque transducer calibration results in one direction to calculate the actual torque in the other torque direction with two methods: one is direct substitution with the nominal torque which gives a propagated linear relative interpolation error and the other is changing the sign of the second coefficient in the cubic function when using in the other torque direction. This proposed modification improves the absolute relative interpolation error by 5 to 16 times in the clockwise and counterclockwise directions based on the torque transducer’s classification.