A new molecular dynamics-like modelling approach aimed at simulating the mechanical behaviour of true polyhedra dense assemblies is presented. Thanks to an improved version of the Gilbert-Johnson-Keerthi contact detection algorithm called GJK - TD, this approach involves no edge or corner rounding and accounts for multipoint face - face or edge - f...
Assisting a human motion with an orthosis requires the modeling of the human-orthosis system to estimate online human joint torque. The current paper proposes an assessment framework for: (i) the analysis of the sources of inaccuracies in joint torque estimation and (ii) the selection of the minimal dynamic model required to estimate joint torque. ...
Assisting a human motion with an orthosis requires the modeling of the human-orthosis system to estimate online human joint torque. The current paper proposes an assessment framework for: (i) the analysis of the sources of inaccuracies in joint torque estimation and (ii) the selection of the minimal dynamic model required to estimate joint torque. ...
We present a combined theoretical and experimental investigation on the single photoionization and dissociative photoionization of gas-phase methyl ketene (MKE) and its neutral dimer (MKE2). The performed experiments entail the recording of photoelectron photoion coincidence (PEPICO) spectra and slow photoelectron spectra (SPES) in the energy regim...
L'emballement thermique est un phénomène redouté dans les industries chimiques, car il peut entraîner des événements catastrophiques lorsqu'il se produit dans une installation industrielle. L'emballement thermique correspond à la perte de contrôle de la température d'un mélange réactionnel due à une réaction exothermique, pouvant provoquer l'explos...
This article discusses design strategies to improve the mechanical behavior of elastic gridshells with singularities. The advantage of meshing with one or more singularity is to allow a wider range of surfaces to be meshed with equal-length, quadrilateral meshes, known as Chebyshev nets. However, the application of this meshing process will influen...
This paper presents two kinds of observers: first order sliding mode and triangular form, applied to a dynamic model of a vehicle in order to estimate the dynamic state of the vehicle and contact forces. The vehicle model is based on Lagrange formalism, which takes into account the evolution of each subsystem under normal operation when there is a ...
The dynamics and control of a vortex pair in ground effect are investigated ina planar, incompressible and laminar setting. The evolution of the vortices obtained numerically shows vortex rebound as a consequence of the separation of the boundary layer induced at the wall by the vortices. An optimal control approach is developed and employed for vo...
