Recherche

Viennet Emmanuel

Professeur HES associé

Compétences principales

Professeur HES associé

Téléphone: +41 26 429 66 70

Bureau: HEIA_E00.08

Haute école d'ingénierie et d'architecture de Fribourg
Boulevard de Pérolles 80, 1700 Fribourg, CH

Institut
SeSi - Sustainable Engineering Systems Institute

BSc HES-SO en Génie mécanique - Haute école d'ingénierie et d'architecture de Fribourg

Hydraulique de puissance
Systèmes d'entraînement
Modélisation de systèmes
Vibrations mécaniques (Schwingungslehre)

En cours

Développement d'un système de freinage ABS pour vélo

AGP

Rôle: Requérant(e) principal(e)

Financement: FR - EIA - Institut SeSi

Description du projet : Développer un système de freinage ABS pour vélo en utilisant une approche MBSE. Le modèle de simulation du système de freinage, incorporant a priori les dimensions mécaniques, électriques, hydraulique ainsi que la boucle de commande, permet de définir la régulation physique du frein, alors que les informations mesurées sur le système physique permettent d'affiner le modèle de simulation.

Equipe de recherche au sein de la HES-SO: Viennet Emmanuel , Robyr Jean-Luc , Bouchardy Loïc , Lambrughi Alessandro , Murith Noé , Donato Laurent , Bonvin Leewan , Corpataux Dominique , Raetzo Raphaël , Mujkic Arnel , Ramosaj Nicolas

Durée du projet: 29.04.2020 - 30.06.2023

Statut: En cours

Terminés

Talaris

Rôle: Requérant(e) principal(e)

Description du projet :

Development of a electric-hydraulic powered ankle-foot orthosis for use in rehabilitation therapy

Equipe de recherche au sein de la HES-SO: Viennet Emmanuel , Bouchardy Loïc

Durée du projet: 01.01.2018 - 31.12.2020

Statut: Terminé

2020

Preliminary design and testing of a servo-hydraulic actuation system for an autonomous ankle exoskeleton

Conference ArODES

Emmanuel Viennet, Loïc Bouchardy

Proceedings of the 12th International Fluid Power Conference, 12-14 October 2020, Dresden, Germany

Lien vers la conférence

Résumé:

The work presented in this paper aims at developing a hydraulic actuation system for an ankle exoskeleton that is able to deliver a peak power of 250 W, with a maximum torque of 90 N.m and maximum speed of 320 deg/s. After justifying the choice of a servo hydraulic actuator (SHA) over an electro hydrostatic actuator (EHA) for the targeted application, some test results of a first functional prototype are presented. The closed-loop unloaded displacement frequency response of the prototype shows a bandwidth ranging from 5 Hz to 8 Hz for displacement amplitudes between +/-5mm and +/- 20mm, thus demonstrating adequate dynamic performance for normal walking speed. Then, a detailed design is proposed as a combination of commercially available components (in particular a miniature servo valve and a membrane accumulator) and a custom aluminium manifold that incorporates the hydraulic cylinder. The actuator design achieves a total weight of 1.0 kg worn at the ankle.

Robustness of the liebherr-aerospace eha technology for future flight control application

Conference ArODES

Emmanuel Viennet, Henry Wider, Tobias Röben

Proceedings of the 12th International Fluid Power Conference, 12-14 October 2020, Dresden, Germany

Lien vers la conférence

Résumé:

Future more electric aircraft (MEA) architectures require a new generation of power-by-wire actuators, e.g. Electro Hydrostatic Actuators (EHA). These units have to be capable of frontline operation of safety critical flight control surfaces over the entire aircraft life. Prove of robustness becomes a challenging objective. This paper illustrates the Liebherr-Aerospace EHA technology as well as methods for validation of robustness. It gives an insight regarding the design of a robust piston pump.

2018

Noise and vibration reduction for an aerospace secondary controlled hydraulic motor

Conference ArODES

Emmanuel Viennet, Anton Gaile, Tobias Röben

Proceedings of the 11th International Fluid Power Conference, 19-21 March 2018, Aachen, Germany

Lien vers la conférence

Résumé:

During flight, passenger comfort is affected by noise emissions from various aircraft systems. Apart from jet engines one of the main sources of noise within the fuselage is the power control unit (PCU) for high-lift actuation. In preparation for take-off and landing this hydraulic motor is responsible for the extension and retraction of the slats and flaps. Along with the increase in operating pressure from 206bar (3,000psi) to 345bar (5,000psi) noise and vibration induced by fluid power systems became more striking. Consequently the aim of the BMWI founded research project “Move On” was to reduce the emissions of Liebherr’s power control unit. The results of these research activities are presented within this paper. It is shown how the noise emissions could be reduced in a secondary controlled hydraulic motor by means of a valve-plate and structure optimization. In addition the results of a noise measurement campaign, conducted by Airbus on an A350, are presented.

Réalisations

Recherche

Viennet Emmanuel

Professeur HES associé

Compétences principales

Hydraulic fluid power

Mechatronic system simulation

Drive and propulsion systems

Engineering dynamics

Simcenter Amesim

Professeur HES associé