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Adaptation de la loi de mouvement aux systèmesde positionnement à dynamique élevée
Richard Béarée, Pierre-Jean Barre
Journal:

Mechanics & Industry / Volume 8 / Issue 5 / September 2007

Published online by Cambridge University Press:

09 January 2008, pp. 407-417

Print publication:

September 2007
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L'augmentation des performances des machines de positionnement passe par l'augmentation des accélérations et donc des sollicitations transmises à la structure de la machine. Ces contraintes sont susceptibles d'engendrer des déformations et des vibrations dégradant le suivi de profil ainsi que le positionnement final. Les commandes numériques avancées disposent de différentes formes de loi de mouvement (à jerk limité, polynomiale...) qui ont un effet notable sur le compromis entre la durée du mouvement effectif et la précision attendue. L'objectif de cet article vise à démystifier cet effet en proposant une analyse comparative de l'influence de différents types de lois de mouvement sur les vibrations, ainsi que sur la durée du mouvement d'un axe soumis à un mode de déformation prépondérant.