Publicaties

Two key technologies that are at the heart of the Executable Digital Twins are Model Order Reduction and Smart Virtual Sensing (SVS). The former allows the high-fidelity models to be represented in compact forms and the latter is an on-line estimator framework which allows to extend the limits of physical sensors and provide full-field data using the simulation models. Previous work from the authors established a time-stable vibro-acoustic ...

This paper presents Finite Element Modeling (FEM) simulation and experimental results of the acoustic and mechanical behavior of an isolated cMUT cell. cMUT cells fabricated in the SiGeMEMS technology of imec are used as test vehicles. Dynamic characteristics of a cMUT cell actuated by a pulse superimposed on a DC bias, such as resonance frequency, Q-factor and transient displacement, are studied using ANSYS FEM and Polytec vibrometer ...

Uncertainty modeling applied at different stages of the virtual prototyping process enhances the quality of the of the design in terms of physical validity. The Fuzzy FEM is a widely accepted numerical simulation tool to model imprecise data in early design stages. The Interval FEM, which forms the basis of the Fuzzy FEM, is based on the interval arithmetic approach or on black-box approaches such as global optimisation or vertex sampling. The ...

© 2018 Elsevier Inc. In this research, a three-dimensional (3D) finite element method (FEM) model based on Faraday's law and moving mesh technique is proposed to simulate the channel machining process in Scanning Micro Electrochemical Flow Cell (SMEFC) and jet electrochemical machining (jet-ECM). The scarcity of available FEM models for the channel fabrication by electrochemical machining (ECM) with confined electrolyte is identified through a ...

This study focuses on the leakage and scattering phenomena of Lamb waves in liquids as the result of the insonification of the end of an immersed solid plate by means of a bounded ultrasonic beam at the Lamb angle. Both acousto-optics measurements and FEM simulations are presented and discussed. It is shown that the observed complex scattered field is composed of the leaking fields of mode-converted backward propagating Lamb waves. The ...

Voxel-intensity based nonrigid image registration can be formulated as an optimization problem whose goal is to minimize a cost function consisting of two parts. One part characterizes the similarity between both images. The other part regularizes the transformation and/or penalizes improbable or impossible deformations. In this paper, we extend previous work on nonrigid registration by introducing a new penalty term expressing the elastic ...

One of the main advantages of thin-walled CFS profiles is the "freedom" the designer has to conceive a cross-section shape tailored for the structural application. Consequently, different cross-sections shapes have been developed and may be found in the market. Furthermore, the combination of thin-walled CFS profiles, in the form of built-up cross-section members, further increases the range of available options. On the other hand, this ...