Offers “SAFRAN”

Expires soon SAFRAN

STAGE - Modélisation d'un viseur terrestre sous SimMechanics H/F

  • FRANCE
  • IT development

Job description

Job Description

Un viseur gyrostabilisé est un ensemble de caméras motorisé. L'objectif du viseur est d'orienter et de stabiliser la ligne de visée des caméras malgré les perturbations extérieures. Cet objectif est obtenu par la mise en place de boucles d'asservissements avec des capteurs absolus (gyromètres) et relatifs (résolveurs).

Les paramètres intrinsèques de la mécanique (inerties, frottements, jeux entre les pièces...) jouent un rôle important dans les performances de pointage et de stabilisation. Ils sont estimés au moment de la phase de développement et ensuite recalés à partir de mesures expérimentales.

En qualité de stagiaire, vous serez intégré(e) au sein du pôle métier TAG (Tracking/Asservissement/Géolocalisation) du centre d'excellence Modules optroniques et Caméras (CE MC) de la division optronique de Safran Electronics & Defense à Massy. Vous serez à la fois encadré(e) côté pôle TAG et côté Bureau d'études mécaniques.

Votre mission sera de construire un modèle mécanique qui simule le comportement dynamique d'un viseur actuellement en production. Le modèle de cette plateforme à 2 axes de rotation sera construit sur Simulink/SimMechanics à partir des données de la CAO et des analyses modales mécaniques existantes :

• Extraction dans la modélisation CAO existante des géométries et des répartitions des masses des pièces en mouvement pour les injecter dans la modélisation SimMechanics.
• Exploitation des analyses par éléments finis et des données expérimentales de la plateforme afin de modéliser les raideurs et les amortissements qui seront introduits sur les liaisons mécaniques du système dans la simulation SimMechanics.

L'objectif est que le modèle soit représentatif des premiers modes de la plateforme. Le modèle mécanique ainsi créé sous SimMechanics permettra de tester, dans l'environnement Simulink, différentes stratégies d'asservissement en amont de la phase de développement de nos futures plateformes.

Desired profile

Job Requirements

Etudiant(e) en école d'ingénieur en Mécatronique, vos compétences sont les suivantes :
- modélisation et mise en équation de systèmes mécaniques.
- utilisation du logiciel de simulation Matlab/Simulink (SimMechanics).
- notions d'analyse modale mécanique (éléments finis).
- utilisation du logiciel de CAO CATIA

Safran is an international high-technology group, operating in the aviation (propulsion, equipment and interiors), defense and space markets. Its core purpose is to contribute to a safer, more sustainable world, where air transport is more environmentally friendly, comfortable and accessible. Safran has a global presence, with 79,000 employees and sales of 16.5 billion euros in 2020 and holds, alone or in partnership, world or regional leadership positions in its core markets. Safran undertakes research and development programs to maintain the environmental priorities of its R&T and Innovation roadmap.

Safran ranks first in Forbes's 2020 list of the World's Best Employers for its sector.

Safran Electronics & Defense is a world leading supplier of products and services that handle observation, decision and guidance functions for both civil and military applications. The company understands and applies a wide range of the state-of-the-art technologies that underpin embedded intelligence in many different areas, as a supplier to some of today's most innovative aerospace and defense programs.

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