Control of a multivariable web winding system

To guarantee a good productivity and a better quality of the industrial systems, it is necessary to know the evolution of its various parameters but also its operation mode. The main goal of this work is to carry out a study to improve a flatness control in a reversing cold rolling mill, precisely the web winding system part. We designate by a winding process any system applying the cycles of unwinding, transport, treatment and winding to various flat products. This system knows several constraints such as the thermal effects caused by the frictions, and the mechanical effects provoked by metal elongation, that generates dysfunctions due to the influence of the process conditions. For this installations type, the various automatisms functions, often very advanced, are realized in modular systems with distributed architecture. Our main goal is to obtain a precise thickness, with the best possible regularity. With this intention, we are preceded to the modelling and the control of the nonlinear dynamic behaviour of a web winding process

Elaboration d'un identificateur de creux de tension pour contrôler une génératrice éolienne connectée à un réseau électrique perturbé

International audienceCe travail s’inscrit dans le domaine du monitoring de la qualité de l’énergie électrique. Il a pour objectif d’introduire de nouvelles techniques dans l’analyse et le traitement des creux de tension électrique. En effet, ces creux de tension affectent négativement la qualité de l’énergie électrique dans les réseaux et représentent un handicap majeur pour l’industrie consommatrice d’électricité. En effet, ils peuvent causer l’interruption de chaînes de production et de processus industriels menant à des pertes économiques et une dégradation des produits manufacturés [1]. L’objectif de cette étude est le traitement des données et la détection des creux de tension en temps réel. Les résultats de ce travail sont validés par une simulation dans l’environnement MATLAB/SIMULINK

Trimaran: An Infrastructure for Research in Instruction-Level Parallelism

Trimaran is an integrated compilation and performance monitoring infrastructure. The architecture space that Trimaran covers is characterized by HPL-PD, a parameterized processor architecture supporting novel features such as predication, control and data speculation and compiler controlled management of the memory hierarchy. Trimaran als

A high-fidelity and micro-anatomically accurate 3D finite element model for simulations of functional mitral valve

Promising mitral valve (MV) repair concepts include leaflet augmentation and saddle shaped annuloplasty, and recent long-term studies have indicated that excessive tissue stress and the resulting strain-induced tissue failure are important etiologic factors leading to the recurrence of significant MR after repair. In the present work, we are aiming at developing a high-fidelity computational framework, incorporating detailed collagen fiber architecture, accurate constitutive models for soft valve tissues, and micro-anatomically accurate valvular geometry, for simulations of functional mitral valves which allows us to investigate the organ-level mechanical responses due to physiological loadings. This computational tools also provides a means, with some extension in the future, to help the understanding of the connection between the repair-induced altered stresses/strains and valve functions, and ultimately to aid in the optimal design of MV repair procedure with better performance and durability