CNRS Quartz Laboratory

Saint Ouen, France

CNRS Quartz Laboratory

Saint Ouen, France

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Plateaux R.,CNRS Quartz Laboratory | Penas O.,CNRS Quartz Laboratory | Barbedienne R.,CNRS Quartz Laboratory | Hehenberger P.,Johannes Kepler University | And 2 more authors.
Computer-Aided Design and Applications | Year: 2017

This paper presents the MBSE challenges related to the conceptual design of mechatronic systems and especially the need to ensure geometrical knowledge consistency. To tackle this issue, we propose to define an ontology based on the TTRS (Technologically and Topologically Related Surfaces) geometrical modeling. We implement it in the Protégé environment and validate it through the modeling process of an Electric Power Train, including many additional geometrical issues related to mechatronic system design, such as physical integration and the related compactness metric and the thermal modeling for multi-physical couplings. Geometrical knowledge consistency has been ensured through a model transformation between SysML and FreeCAD, using Python. © 2017 CAD Solutions, LLC

Masmoudi M.,CNRS Quartz Laboratory | Masmoudi M.,University of Sfax | Job S.,CNRS Quartz Laboratory | Abbes M.S.,University of Sfax | And 2 more authors.
Granular Matter | Year: 2016

Particle dampers are passive devices allowing strong damping of structures vibrating in harsh environment. We investigate the energy dissipation in a rigid enclosure attached to a shaker and partially filled with particles. Our experiments match an analytical description, which we corroborate then with discrete element method simulations. We show that the loss factor does not depend on the material of the particles or their number, but heavily relies on the total mass of the embedded grains and on the driving magnitude only. Our measurements reveal the contribution of the viscous flow of air surrounding the grains to the overall loss factor of the dampers. © 2016, Springer-Verlag Berlin Heidelberg.

Ghanes M.,CNRS Research Institute of Communication and Cybernetics of Nantes | DeLeon J.,Autonomous University of Nuevo León | Barbot J.-P.,CNRS Quartz Laboratory | Barbot J.-P.,French Institute for Research in Computer Science and Automation
Journal of the Franklin Institute | Year: 2016

In this paper, a class of time-delayed nonlinear systems with unknown parameters and unknown time-varying delays is considered. A high gain observer approach is proposed for simultaneous state observation and parameter identification. Sufficient conditions are obtained to ensure the boundedness of both observation and identification errors. Consequently a practical stability of the proposed observer is achieved. Moreover, an exponential stability of the observer is derived from the knowledge of time-delay. Simulation results are given to illustrate the performances of the proposed observer design under time-varying delay function and a piecewise unknown parameter. © 2016 The Franklin Institute.

Warniez A.,CNRS Quartz Laboratory | Penas O.,CNRS Quartz Laboratory | Choley J.-Y.,CNRS Quartz Laboratory | Hehenberger P.,Johannes Kepler University
Journal of Robotics and Mechatronics | Year: 2016

Due to the complexity of designing mechatronic systems, providers of these systems need to precisely evaluate their products, design processes and projects all along the design phase and beyond. We propose a metrics generation process and then define related specifications to develop an evaluation tool to build customized metrics for the mechatronic industry with respect to its specific process and expectations. The proposed process has been experimented on the modularity measure of two generations of vacuum cleaner robots. © 2016, Fuji Technology Press. All rights reserved.

Binois R.,CNRS Roberval Laboratory (Mechanical Research Unit) | Binois R.,CNRS Quartz Laboratory | Perrey-Debain E.,CNRS Roberval Laboratory (Mechanical Research Unit) | Dauchez N.,CNRS Roberval Laboratory (Mechanical Research Unit) | And 3 more authors.
Acta Acustica united with Acustica | Year: 2015

To estimate the efficiency of parallel baffle-type silencers in rectangular ducts, a two-dimensional multi-layer model is presented for predicting their transmission loss. The approach takes into account an arbitrary number of bulk reacting baffles of finite length bounded at both ends by a metallic fairing. Each layer is described by a mean pressure, which allows computing a piecewise constant modal basis for the mean pressure over the cross section. The continuity between the incoming and outgoing waves is performed by axial mode matching at the inlet and outlet cross-sections of the baffle silencer. It is shown that the model is easy to implement and suitable for optimization purposes based on design parameters such as the height of each baffle, their relative positions in the duct, and material properties. Relatively complex configurations can be simulated with relatively modest computational effort. An experimental campaign was carried out on a reduced scale test bench for standard configurations. The numerical results are in good agreement with the measurements. Noise reduction performances are analyzed in terms of reflected and dissipated sound powers. Finally, more complex geometric configurations are simulated in order to examine the influence of the relative transverse and axial positions of each baffle as well as the effect of a resistive screen between the baffles and the airways. © S. Hirzel Verlag • EAA.

Goeller A.,CNRS Quartz Laboratory | Dion J.L.,CNRS Quartz Laboratory | Le Breton R.,CNRS Quartz Laboratory | Soriano T.,CNRS Quartz Laboratory | Roux B.,Vannier Kinoptik
2016 11th France-Japan and 9th Europe-Asia Congress on Mechatronics, MECATRONICS 2016 / 17th International Conference on Research and Education in Mechatronics, REM 2016 | Year: 2016

Nowadays, visual information is everyday more present, cameras are more and more fast, small and accurate. Improvements in computer vision enable to go further: to consider cameras as smart sensors. In this framework, this article propose to mix complex mechanical models with video processing in order to estimate invisible parameter and to enable the camera to forecast in the video, with a dynamic meaning. The concept is developed on particular cases of objects moving in a scene where the scenario is known. This application is a proof of concept on a case study of a 2D scenario of a ruler sliding on a table. The aim is to prove the feasibility on a real case with real time architecture. © 2016 IEEE.

Fortes Da Cruz J.,CNRS Quartz Laboratory | Da Silva Botelho T.,CNRS Quartz Laboratory | Lemaire-Caron I.,CNRS Quartz Laboratory | Durand A.-M.,ACM | Messager D.,JPB Systeme
Tribology International | Year: 2016

Inconel 718 flat rough surfaces were tested under fretting conditions at room and high temperature (600°C). Analysis were focused on friction coefficient, damage and fretting regime. Several coatings were tested, and showed significant differences depending on the test temperature. The bonded coating offers good protection against fretting wear at ambient temperature but loses its properties at 600°C where the CrC shows excellent durability and lower friction thanks to the formation of a few micrometers thin glaze layer. WS2 solid lubricant layers also show a similar protective behaviour at high temperature but under lighter normal loads and for a lower lifespan. © 2016.

Casimir J.B.,CNRS Quartz Laboratory | Khadimallah M.A.,University of Carthage | Khadimallah M.A.,Prince Sattam Bin Abdulaziz University | Nguyen M.C.,Hanoi University of Science and Technology
Computers and Structures | Year: 2016

This paper describes a procedure for taking into account distributed loads in the calculation of the harmonic response of a cross-ply laminated circular cylindrical shell using the dynamic stiffness method. This work is a direct continuation of a previous work concerning isotropic materials. Equivalent loads are established on element boundaries to determine the response of the system. Therefore, the vibration analysis is solved with numerical examples in order to determine the performances of this approach. The method allows reducing both the size of the model and computing time, and ensures higher precision compared to the finite element method. © 2016 Elsevier Ltd. All rights reserved.

Mhenni F.,CNRS Quartz Laboratory | Choley J.-Y.,CNRS Quartz Laboratory | Nguyen N.,EISTI Cergy | Frazza C.,Directorate General of Armaments
IFAC-PapersOnLine | Year: 2016

The introduction of new technologies to build ‘More Electric Aircraft’ induces new challenges for both the design and safety analysis of new aircraft. A model-based approach is needed for both design and validation processes in order to manage the complexity and validate the conformance to safety requirements. In this paper, a SysML-based approach merging MBSE and MBSA is presented. This approach is applied to a Flight Control System (FCS) both for the design and the validation processes. A parallel is made to compare the models used in each of these processes. This comparison led to suggestions of improvements both for the design and verification and validation approaches. © 2016

Mcharek M.,CNRS Quartz Laboratory | Hammadi M.,CNRS Quartz Laboratory | Choley J.-Y.,CNRS Quartz Laboratory | Azib T.,ESTACA Laboratory | Larouci C.,ESTACA Laboratory
2016 11th France-Japan and 9th Europe-Asia Congress on Mechatronics, MECATRONICS 2016 / 17th International Conference on Research and Education in Mechatronics, REM 2016 | Year: 2016

This paper deals with the preliminary design and optimization of a mechatronic system. We propose to take into account the technology of the system in preliminary design and also to make the optimization of the parametric model separately from the controller system. This approach is illustrated with a simulation model of an Electronic Throttle (ET) using Modelica. This component is challenging due to its nonlinearities and the required fast response time. An optimization of the system is proposed to meet the response time and torque requirements. The contributions of this work lie in the failsafe technology modeling and the optimization in open loop. The presented optimization results demonstrate the efficiency of the proposed methodology. © 2016 IEEE.

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