Letteratura scientifica selezionata sul tema "Mécanisme Flexible"
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Articoli di riviste sul tema "Mécanisme Flexible":
Decaluwe, B., e J. S. Bhandari. "Un cadre d’analyse pour l’étude d’un régime de double marché des changes imparfaitement cloisonné". Recherches économiques de Louvain 53, n. 1 (marzo 1987): 75–88. http://dx.doi.org/10.1017/s0770451800083032.
Orujov, Elshan. "Pandémie de Covid-19: La transition de la mondialisation à l'hyper mondialisation". InterConf, n. 39(179) (20 novembre 2023): 55–66. http://dx.doi.org/10.51582/interconf.19-20.11.2023.005.
Larocque, M., e O. Banton. "Gestion de la contamination des eaux souterraines par les fertilisants agricoles: application du modèle AgriFlux". Revue des sciences de l'eau 8, n. 1 (12 aprile 2005): 3–20. http://dx.doi.org/10.7202/705210ar.
El Khoury Moussa, Roba, Mathieu Grossard, Christine Rotinat-Libersa, Mehdi Boukallel, Nicolas Chaillet e Arnaud Hubert. "Méthode des blocs sensitifs pour la synthèse optimale de mécanismes flexibles à mesure piézoélectrique intégrée". Mécanique & Industries 10, n. 3-4 (maggio 2009): 317–22. http://dx.doi.org/10.1051/meca/2009056.
Julien, Ludovic. "Chômage involontaire d’équilibre et flexibilité des salaires dans une économie monétaire". Économie appliquée 57, n. 3 (2004): 113–40. http://dx.doi.org/10.3406/ecoap.2004.3731.
Benmansour, Rachid, Abdelhakim Artiba, Anis Chelbi e Hamid Allaoui. "Application de l'AMDEC pour l'amélioration de la maintenance d'une machine d'usinage intégral". Revue Française de Gestion Industrielle 29, n. 4 (1 dicembre 2010): 81–102. http://dx.doi.org/10.53102/2010.29.04.642.
Cadiot, Pierre. "Représentations d'objets et sémantique lexicale: Qu'est-ce qu'une boîte?" Journal of French Language Studies 4, n. 1 (marzo 1994): 1–23. http://dx.doi.org/10.1017/s0959269500001952.
Uilenberg, Gerrit. "Lutte intégrée contre les parasitoses animales tropicales". Revue d’élevage et de médecine vétérinaire des pays tropicaux 49, n. 2 (1 febbraio 1996): 124–29. http://dx.doi.org/10.19182/remvt.9529.
Joye-Bruno, Catherine. "Transmission de la politique monétaire et régime de changes : une comparaison France - Allemagne - Etats-Unis". Revue de l'OFCE 61, n. 2 (1 giugno 1997): 139–64. http://dx.doi.org/10.3917/reof.p1997.61n1.0139.
Naceur, Selmi, e Bel Hadj Salah Hedi. "Finite Element and Experimental Investigation of the Multipoint Flexible Hydroforming". Key Engineering Materials 554-557 (giugno 2013): 1290–97. http://dx.doi.org/10.4028/www.scientific.net/kem.554-557.1290.
Tesi sul tema "Mécanisme Flexible":
Wu, Ke. "Conception, Modélisation, Optimisation et Commande de Mécanisme Flexible". Electronic Thesis or Diss., Centrale Lille Institut, 2023. http://www.theses.fr/2023CLIL0008.
According to the literature, it is clearly found out that in the field of compliant mechanisms (CMs),there is no existing results on how to geometrically define random-shape initially curved beams(ICBs) and efficiently modeling large deflection of these slender structures under complex loading conditions. In particular, efficiently modeling nonlinear buckling and post-bucking to serve the design of CMs has not been achieved to the best of our knowledge. Besides, there is also few results for model-based design (optimization) and model-based control of CMs. If the mentionedproblems are not solved, researchers may still suffer from the time-consuming trial-and-errordesign process and be stuck with global-enumeration-based design framework or purelyempirical design methods
Beets, Eric. "Modélisation des systèmes mécaniques articulés flexibles par utilisation des coordonnées naturelles et des équations de Kane : expérimentation et validation numérique". Valenciennes, 1997. http://www.theses.fr/1997VALE0039.
The simulation of multibody dynamics has known an important expand since the 60's. Until the end of the 70's, bodies were considered as rigid in the most of software packages. Results are excellent as long as deformations remain weak. However, the simulation of large sizes or high-speed revolving mechanisms, as well as the optimization of masses, needs to take structural flexibilities into account. During the development of a flexible multibody formalism, it is necessary to choose the descriptive coordinates systems allowing to position the moving reference frame and the type of the motion equations. The former affects directly the facility of the mechanism description as well as the operative cost. We have therefore chosen to develop a method based on Kane’s equations in natural coordinates. These last lead to a simple and “natural” description of the mechanism and to a limited number of descriptive coordinates. Kane’s equation generate besides a minimal number of motion equations. The finite element method is here employed to introduce the elastic coordinates and the component mode s used in order to reduce the number of degrees of freedom. It is also possible to increase the step of the numerical integration method. A software based on this method has therefore been developed. Two benchmarks allow us to conclude that, for similar results, CPU times are inferior to classical methods based on the one hand on Lagrange’s equations in absolute coordinates and on the other hand on Lagrange’s equation in natural coordinates. Moreover, the realization of an experimental flexible four bars mechanism allows showing that the method gives results close to effective working conditions
Bruyas, Arnaud. "Apport de la fabrication additive multi-matériaux pour la conception robotique". Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAD045/document.
Percutaneous interventional radiology permits the diagnosis or the treatment of cancer tissues thanks to the use of needles and imaging devices. Being minimally invasive, such procedures are beneficial for the patient, but for the radiologist, they are highly complex. In order to assist the physician and remotely control the needle, we propose in this work the design and the manufacturing of multi-material compliant devices by taking advantage of multi-material additive manufacturing. To perform the design of such device, we propose several solutions in terms of kinematics, actuation and sensing. In particular, we developed a new compliant joint, the HSC joint, as well as a new pneumatic actuator for needle insertion. In the end, we demonstrate in the thesis the contributions of multi-material additive manufacturing for medical robotics, by combining all those solutions into a single device that remotely controls both the orientation and the insertion of the needle
Gomes, Sebastião Cícero Pinheiro. "Précision de la transmission du couple par un moto-réducteur électrique : modélisation et commande d'un bras rigide ou flexible avec compensation du frottement". Toulouse, ENSAE, 1992. http://www.theses.fr/1992ESAE0020.
Gagarina, Tatiana. "Modèle pseudo-rigide pour la simulation dynamique des mécanismes flexibles". Paris 6, 1999. http://www.theses.fr/1999PA066607.
De, Greef Aline. "Towards medical flexible instruments: a contribution to the study of flexible fluidic actuators". Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210073.
• A literature review of these actuators has been established. It has allowed to identify the different types of motion that these actuators can develop as well as the design principles underlying. This review can help to develop flexible instruments based on flexible fluidic actuators.
• A test bench has been developed to characterize the flexible fluidic actuators.
• A interesting measuring concept has been implemented and experimentally validated on a specific flexible fluidic actuator (the "Pneumatic Balloon Actuator", PBA). Ac- cording to this principle, the measurements of the pressure and of the volume of fluid supplied to the actuator allow to determine the displacement of the actuator and the force it develops. This means being able to determine the displacement of a flexible fluidic actuator and the force it develops without using a displacement sensor or a force sensor. This principle is interesting for medical applications inside the human body, for which measuring the force applied by the organs to the surgical tools remains a problem.
The study of this principle paves the way for a lot of future works such as the implemen- tation and the testing of this principle on more complex structures or in a control loop in order to control the displacement of the actuator (or the force it develops) without using a displacement or a force sensor.
• A 2D-model of the PBA has been established and has helped to better understand the physics underlying the behaviour of this actuator.
• A miniaturization work has been performed on a particular kind of flexible fluidic actu- ator: the Pleated Pneumatic Artificial Muscle (PPAM). This miniaturization study has been made on this type of actuator because, according to theoretical models, minia- turized PPAMs, whose dimensions are small enough to be inserted into MIS medical instruments, could be able to develop the forces required to allow the instruments to perform most surgical actions. The achieved miniaturized muscles have a design similar to that of the third generation PPAMs developed at the VUB and present a total length of about 90 mm and an outer diameter at rest of about 15 mm. One of the developed miniaturized PPAMs has been pressurized at p = 1 bar and it was able to develop a pulling force F = 100 N while producing a contraction of 4 %.
Propositions have been made regarding a further miniaturization of the muscles.
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished
Lachance, Denis. "Analyse mécanique de chaussées flexibles dans un contexte climatique nordique". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0006/MQ44703.pdf.
Petlova-Marinova, Svetlana. "Modélisation et simulation du comportement mécanique des composites textiles flexibles". Paris 6, 2003. http://www.theses.fr/2003PA066473.
Le, Druillennec Marie. "Etude des mécanismes d'endommagement de films minces métalliques déposés sur substrats souples pour l'électronique flexible". Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAI108/document.
Over the past 20 years, new improvements in materials and processes led to the development of printed flexible electronics. Flexible electronics devices subjected to bending, twisting, or stretching during their lifetime, the development of device with high reliability is therefore of great importance for the efficiency of electrical connection. This work investigates the mechanical reliability of inkjet or screen-printed Ag thin films on polyimide substrates dedicated to the electrical interconnection of active components. Expected mechanical failure modes are film cracking and buckling delamination.First of all, in order to characterized the two mechanisms, tensile tests are performed under an optical microscope to follow cracks and under an optical interferometer to follow buckles. In order to obtain crack spacing evolution during deformation, an image processing is realized. Two types of cracks are observed: long and straight cracking for thick films and small and zigzag shape cracking for thin films. The evolution of buckles shape with imposed tensile deformation is characterized.In a second time, in order to understand experimental observations, mechanical failure modes are analysed with finite elements models. The origin of the two types of cracking are explained by a geometrical effect of film thickness. A elastoplastic shear lag bidimensional model gives upper and lower bonds of crack spacing during deformation. A three-dimensional model allows identification of cohesive zone model parameters at film/substrate interface, from experimental buckle shape. An adhesion energy of 2 J.m-2 , a critical strength of 20 MPa and a mode mixity parameter of 0.4 are determined. These values are in good agreement with literature
Dufour, Régis. "Influence d'un couple axial sur le comportement dynamique des rotors flexibles". Lyon 1, 1985. http://www.theses.fr/1985LYO19011.
Libri sul tema "Mécanisme Flexible":
Azad, A. K. M., e M. O. Tokhi. Flexible robot manipulators: Modelling, simulation and control. London: Institution of Engineering and Technology, 2008.
(Editor), M. O. Tokhi, e A. Azad (Editor), a cura di. Flexible Robot Manipulators: Modelling, Simulation And Control. Peter Peregrinus Ltd, 2008.
Azad, A. K. M., e M. O. Tokhi. Flexible Robot Manipulators: Modelling, Simulation and Control. Institution of Engineering & Technology, 2017.
Tokhi, M. O., e A. K. M. Azad. Flexible Robot Manipulators: Modelling, simulation and control. The Institution of Engineering and Technology, 2017.