Beatriz Moya - Data Learning of Fluid Dynamics for Physically Informed Digital Twins

Data Learning of Fluid Dynamics for Physically Informed Digital Twins

Jornada de Jóvenes Investigadores del I3A ◽

10.26754/jjii3a.4861 ◽

2020 ◽

Vol 8 ◽

Author(s):

Beatriz Moya ◽

Icíar Alfaro ◽

David González ◽

Francisco Chinesta ◽

Elías Cueto

Keyword(s):

Artificial Intelligence ◽

Fluid Dynamics ◽

Augmented Reality ◽

User Interaction ◽

Digital Twin ◽

Digital Twins

We present a novel realtime digital twin based on artificial intelligence to emulate physically sound fluid dynamics, and classify and recognise liquids, with information from video streamings. Results are presented with augmented reality techniques not only for friendly user interaction, but also to provide augmented information in manipulation tasks.

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A new simplified fluid dynamic model for digital twins of electrohydraulic servovalves

Aircraft Engineering and Aerospace Technology ◽

10.1108/aeat-12-2020-0321 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Matteo Davide Lorenzo Dalla Vedova ◽

Pier Carlo Berri

Keyword(s):

Fluid Dynamics ◽

Dynamic Models ◽

Numerical Models ◽

Fluid Dynamic ◽

Water Hammer ◽

Operating Conditions ◽

Nonlinear Dependence ◽

Content Type ◽

Digital Twins ◽

Proposed Model

Purpose The purpose of this paper is to propose a new simplified numerical model, based on a very compact semi-empirical formulation, able to simulate the fluid dynamics behaviors of an electrohydraulic servovalve taking into account several effects due to valve geometry (e.g. flow leakage between spool and sleeve) and operating conditions (e.g. variable supply pressure or water hammer). Design/methodology/approach The proposed model simulates the valve performance through a simplified representation, deriving from the linearized approach based on pressure and flow gains, but able to evaluate the mutual interaction between boundary conditions, pressure saturation and leak assessment. Its performance was evaluated comparing with other fluid dynamics numerical models (a detailed physics-based high-fidelity one and other simplified models available in the literature). Findings Although still showing some limitations attributable to its simplified formulation, the proposed model overcomes several deficiencies typical of the most common fluid dynamic models available in the literature, describing the water hammer and the nonlinear dependence of the delivery differential pressure with the spool displacement. Originality/value Although still based on a simplified formulation with reduced computational costs, the proposed model introduces a new nonlinear approach that, approximating with suitable precision the pressure-flow fluid dynamic characteristic of a servovalve, overcomes the shortcomings typical of such models.

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