A method for the evaluation of the response of torque transducers to dynamic load profiles

Abstract

The traceability of the torque quantity finds a gap when there is a regime with torque variation rates. The traditional calibration methods define the references to be on the static regime, with null torque rates. This paper presents a method for providing torque traceability to rotating sensors under high torque variation rates. The principle of applying acceleration pulses to rotating shafts, with mounted reference discs with known mass moments of inertia thereon, is presented herein, followed by a description of sequential proceedings for obtaining an analysis in the time domain. The development of the uncertainty budget is also discussed. Demonstrative experimental data is used in order to ratify the principle and to maintain a qualitative approach to the theoretical description of these methods. The research gives a very good idea of the necessary different future approaches to guarantee traceability for mechanical quantities.

Metrological characterisation of rotating-coil magnetometer systems

“…In order to minimise the impact of the mechanical measurements on the magnetic measurements, an indirect measurement of is performed. Instead of mounting force sensors at the joints between the parts, like torque transducers [14], accelerometers are mounted at the shaft supports. Therefore, accelerations are measured, and forces are estimated.…”

Development of a novel dynamic torque generation machine based on the principle of a Kibble balance

“…The Instituto Nacional de Metrologia, Qualidade e Tecnologia in Brazil, in collaboration with Technische Universität Ilmenau, Germany, aims to precisely measure dynamic torque by rotating an axis connected to a disk with a known moment of inertia, providing an acceleration pulse to it, which acts as a brake. They ultimately obtained the dynamic torque from the moment of inertia and acceleration [18][19][20]. The Shanghai Marine Equipment Research Institute in China has developed equipment with a nominal capacity of 100 N m, which measures dynamic torque by loading a certain amount of torque in advance and then applying torque in the opposite direction [21,22].…”