Rotational and end effects: a model for uncertainty evaluation in force measurements by means of dynamometers

The influence of a balanced structure on the rotation effect of a build-up system

“…To sum up, the bending moment and the non-axial components are the root causes of the rotation effect [5,6]. Thus, attention should be paid to the evaluation of the rotation effect, which is taken as an important parameter in the classification of a force transducer [7].…”

“…The rotation effect could be improved by limiting the deformation of the distribution plate [8,9] and enhancing axial symmetry of the mechanical and electrical structure [10,11] model for evaluating the force measurement uncertainty was derived, by which the rotation effect was interpreted [7,12]. Six-component dynamometer was used to measure the force components for evaluating the rotation effect [6,13].…”

Analysis of mechanical properties for the key force transfer components of 2 MN deadweight force standard machine

“…The theoretical value of uncertainty of DWM measurement is 1 × 10 -5 , but the actual value is only 5 × 10 -5 [1]. There are many factors affecting the measurement uncertainty of DWM, usually including the local acceleration of gravity, weight material density, uncertainty of weight mass, the density of air quality, the swing of the central boom and beam tilt (the uncertainty of DWM and the force transducer structures) [2][3][4][5][6][7]. Also, it includes the influence of tidal level effect on gravitation, the influence of air conditioning airflow, the influence of gravitation between weights, humidity, temperature, hardness of the pad, and so on [8].…”

The Additional Side Force on the Force Transducer in the Combinatorial Load Cell

“…However, it can only estimate rotation effect roughly. So six positions should be chosen for calibration to obtain for more accuracy result [8]，which include 0，60°, 120°, 180°, 240°and 300°. After the first one position is calibrated，the loading position is rotated along the axis of combinatorial load cell，and then others in sequence.…”