Section: Bilateral Contracts and Grants with Industry

Bilateral Contracts and Grants with Industry

EADS - Idealization of components for structural mechanics (06/2011 - 06/2014)

Participants : Flavien Boussuge, Stefanie Hahmann, Jean-Claude Léon.

Cifre PhD in partnership with EADS IW to generate the shape of mechanical components through dimensional reduction operations as needed for mechanical simulations, e.g. transformations from volume bodies to shells or plates forming surface models, usually non-manifold ones. The topic addressed covers also the shape detail removal process that takes place during the successive phases where subsets of the initial shape are idealized. Mechanical criteria are taken into account that interact with the dimensional reductions and the detail removal processes. The goal is to define the transformation operators such that a large range of mechanical components can be processed as automatically and robustly as possible. Two major results have been obtained to generate construction graphs from CAD models and use a construction graph to generate a dimensionnally reduced model suited for Finite Element Analyses.

EDF - Generating construction graphs of solids for physical simulation purposes (09/2013 - 09/2016)

Participants : Jean-Claude Léon, Aarohi Johal.

Cifre PhD in partnership with EDF to generate a construction graph of a CAD solid model from its description as in a STEP file in collaboration with Georges-Pierre Bonneau (Maverick project).This is a most frequent requirement in an industrial context where construction trees are lost when transfering models between CAD and simulation software. It is also critical to describe variants of construction processes of a solid because different modifications or different applications require different construction processes whereas a CAD software could provide only the construction process used when initially generating a solid. This project builds upon the construction graph generation process set up for dimensional reduction of solids and on the symmetry analysis of solids that have been addressed in the past years.

HAPTIHAND technology transfer project (Inria-HAPTION-Arts et Métiers ParisTech) (10/2012-08/2014)

Participants : Maxime Borettaz, Thomas Dupeux, Jean-Claude Léon.

The objective is to transfer a device, named HandNavigator, that has been developed in collaboration with Arts et Métiers ParisTech/Institut Image, as add on to the 6D Virtuose haptic device developed by HAPTION. The purpose of the HandNavigator is to monitor the movement of a virtual hand at a relatively detailed scale (movements of fingers and phalanxes), in order to create precise interactions with virtual objects like object grasping. This includes monitoring the whole Virtuose 6D arm and the HandNavigator in a virtual environment, for typical applications of maintenance simulation and virtual assembly in industry. The project covers the creation of an API coupled to physical engine to generate and monitor a realistic and intuitive use of the entire device, the creation of physical prototypes incorporating multiple sensors for each user's finger. The physical prototypes have been developed using rapid prototyping technologies like the 3D printing device available from the Amiqual4Home project (ANR-11-EQPX-0002).