Publicaties
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Geometric 3D Model Building from Sensor Measurements Collected during Compliant Motion: Stochastic Filtering and Hardware Architectures (Geometrisch 3D model opbouw vanuit sensor metingen die bekomen werden tijdens het uitvoeren van bewegingen in contact KU Leuven
Tegenwoordig zijn de meeste industriële robottaken positie gestuurd.Hierdoor is het noodzakelijk dat het werkgebied van de robot gestructureerd is. Dit wil zeggen dat zowel de werktuigen, gemonteerd op de robot, als de geometrie van de werkstukken, nauwkeurig gekend zijn. Het voorgestelde onderzoek heeft tot doel de inspanning die het programmeren vergt te verkleinen en een grotere autonomie voor de robot te bekomen door de posities en de ...
Robust topology optimization of 2D and 3D continuum and truss structures using a spectral stochastic finite element method Vrije Universiteit Brussel
In this paper a framework is introduced for robust structural topology optimization for 2D and 3D continuum and truss problems. Spectral stochastic nite element method is used, with a polynomial chaos expansion to propagate uncertainties on the material characteristics to the response quantities. The uncertain parameters are modelled using a spatially correlated random eld which is discretized using the Karhunen-Loeve expansion. Special ...
3D subsurface characterisation of the Belgian Continental Shelf: a new voxel modelling approach Vlaams Instituut voor de Zee Universiteit Gent
Modelling of surface and shallow subsurface data is getting more and more advanced and is demonstrated mostly for onshore (hydro)geological applications. Three-dimensional (3D) modelling techniques are used increasingly, and now include voxel modelling that often employs stochastic or probabilistic methods to assess model uncertainty. This paper presents an adapted method ologicalwork flow for the 3Dmodelling of offshore sand deposits and aims ...
Stochastic modelling for virtual engineering of controlled atmosphere storage of fruit KU Leuven
Long term storage of pear fruit requires low temperature and conventionally uses controlled atmosphere (CA) conditions to reduce respiration and consequent quality loss. Sub-optimal storage conditions may lead to physiological disorders and loss of product. Stochastic variability of the properties of fruit introduces uncertainty in storage design and operations and could result in severe quality loss. Taking such variability into account in ...
A unified stochastic framework for robust topology optimization of continuum and truss-like structures Vrije Universiteit Brussel
In this paper a framework is introduced for robust structural topology optimization for 2D and 3D continuum and truss problems. The uncertain material parameters are modelled using a spatially correlated random field which is discretized using the Karhunen-Loève expansion. Spectral stochastic finite element method is used, with a polynomial chaos expansion to propagate uncertainties on the material characteristics to the response quantities. In ...
Stochastic flow modeling for resin transfer moulding KU Leuven
Liquid moulding processes suffer from inherently present scatter in the textile reinforcement properties. This variability can lead to unwanted filling patterns within the mould resulting in bad parts. If thermoplastic resins are used with the in-situ polymerisation technique, an additional difficulty appears. The time window to inject the material is small if industrial processing parameters are used (< 5 minutes). To model the stochastic ...
Stochastic modeling of the elastic response of parts produced by material extrusion using ideal voids Vrije Universiteit Brussel
The voids in 3D printed materials produced by the material extrusion technique are mainly located between the printed filaments. Their shape depends on material and printing parameters and can be both convex and concave. This shape influences the accuracy of the predictions of common homogenization schemes that consider spheroidal shapes. A novel approach is introduced in this study for converting real voids to ideal supercylindrical ones that ...