Evaluation of force standard machines with two multi-component dynamometers
The present report compares the main results obtained in the course of a campaign of measurements by means of multicomponent dynamometers on standard deadweight machines in EEC countries. It was undertaken with the following purposes : 1) Metrological characterisation of the different force standard machines, i.e. measurement of the parasitic components (transverse forces and moments) and the influence of parameters such as weight-piece combination, different positions of the adjustable crossbeam, etc. on these components. 2) Identification of defects in the machine structure that give rise to parasitic components. These defects can be of the following types : - structure flexibility and asymmetric deformation of the machine; - non-planarity of the adjustable crossbeam; - non-axiality of the acting force with respect to the main frame; - faulty load-cell positioning on the machine; - machine/load-cell interaction; - influence of the different load transfer systems; - influence of the systems for weight-oscillation damping. 3) Evaluation of the dynamic behaviour of the machines as a function of machine characteristics (e.g. weights freely oscillating or not oscillating, guided or free frame) and of the loading technique (e.g. load application rate). 4) Comparison of the metrological characteristics of the standard multicomponent dynamometers used during the tests.
Bibliographic Reference: EUR 12726 EN (1990) 83 pp., MF, ECU 4, blow-up copy ECU 11.25
Record Number: 199010788 / Last updated on: 1994-12-01
Original language: en
Available languages: en