Metrological characterization of an hexapod-shaped multicomponent force transducer

A Multicomponent Force Transducer (MFT) was devised by INRiM for a specific request in railway industry of measuring two force components (transversal and axial force). The measurement of the two transversal components was not required, but it was helpful for the practical use. INRiM, basing on its experience, developed and calibrated a full six-components hexapod-design prototype of MFT. Linear regression analysis was applied to get an empirical mathematical model linking the applied components to the MFT outputs. Best Subset Regression was adopted to identify parsimonious models by considering all possible combinations of predictor variables. Finally, the uncertainty associated to the values of transversal and axial force was evaluated.