Development of a Digital Twin of the Mechanical Part of Coriolis Flowmeters Based on Frequency Response Functions

Mathematical (virtual) models allow researchers to predict the change in the sensor readings of a Coriolis flowmeter when changing external factors. However, to develop accurate models it is necessary to take into account the mass and geometry imperfections of a real construction, which have a random distribution and which are almost impossible to measure. In this paper, we consider a mathematical model of the Coriolis flowmeter based on frequency response functions available from experiments. Using this model, we obtained a response of pick-off coils at the excitation from the drive coil with the predetermined frequency. Three models of the Coriolis flowmeter were derived: with empty tubes; with tubes filled with water; with fluid flow at a constant mass flow rate.