Добірка наукової літератури з теми "Identification d'efforts"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "Identification d'efforts".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Статті в журналах з теми "Identification d'efforts":
Eberlin, Philippe. "L’identification acoustique sous-marine des navires-hôpitaux." Revue Internationale de la Croix-Rouge 70, no. 774 (December 1988): 527–41. http://dx.doi.org/10.1017/s0035336100080606.
Дисертації з теми "Identification d'efforts":
Mamao, Gouveia Giovanni. "Identification temporelle d'efforts sur des systèmes multicorps flexibles." St Etienne du Rouvray, INSA, 2008. http://www.theses.fr/2008ISAM0015.
Chesne, Simon. "IDENTIFICATION D'EFFORTS AUX LIMITES DES POUTRES ET PLAQUES EN FLEXION PAR METHODE INDIRECTE." Phd thesis, INSA de Lyon, 2006. http://tel.archives-ouvertes.fr/tel-00135492.
présents aux limites des structures (plaques ou poutres) à partir de déplacements mesurés. Les expressions analytiques de ces
efforts contiennent des termes proportionnels aux dérivées spatiales du déplacement. L'approximation de ces dérivées aux
limites d'une structure est problématique car ces dernières sont très sensibles aux erreurs de mesure et les méthodes classiques
de calcul (différences finies, méthodes modales, transformée de Fourier spatiales, ...) et de régularisation (filtrage en nombre
d'onde, troncature modale) pour les obtenir ne sont pas adaptées pour une identification aux limites d'un domaine spatial.
Dans ce travail, une approche mathématique est proposée. Il s'agit de calculer les efforts aux limites, sans
utiliser directement leurs expressions analytiques qui contiennent les dérivées spatiales. La méthode est basée sur un calcul
intégral de l'équation de mouvement de la structure considérée, multipliée par une fonction test, qui vérifie des conditions aux
limites particulières. Ces conditions permettent d'extraire, lors du développement du calcul, les efforts recherchés à la limite du
domaine (efforts tranchant ou moment fléchissant).
La technique est développée dans les cas mono dimensionnel (poutre) et bidimensionnel (plaque). Des
simulations numériques illustrent la méthode, testent la robustesse de la méthode, les effets de différent bruits de mesure sur
l'identification, et établissent les limites spatiales et fréquentielles de l'approche. Des expérimentations ont été menées,
montrant la faisabilité de la méthode d'identification en utilisant des mesures réelles.
Chesne, Simon. "Identification d'efforts aux limites des poutres et plaques en flexion par méthode indirecte." Lyon, INSA, 2006. http://theses.insa-lyon.fr/publication/2006ISAL0109/these.pdf.
This work deals with the identification of forces at the boundaries of beams plates measuring only displacements. These identifications are difficult because shear force or bending moment depend directly on various spatial derivatives of displacement to the boundaries of the domain under examination. These derivatives can be approximated from measured displacements but two major difficulties appear: Derivatives are highly sensitive to measurement errors and the methods used to obtain them (finite differences, modal approach, etc. ) are not well adapted to boundary measurements. In this work, a mathematical approach is proposed to compute forces at boundaries without any direct calculation of the derivatives. The method is based on the integral calculus of equations of motion multiplied by test functions which have to satisfy particular boundary conditions. These conditions enable to extract, from the integral calculus, the boundary forces the domain under study. This thesis contains for each case (beams or plates) the description of the technique and the definition of the test functions that make these identifications at boundary points possible, some numerical simulation results, including effects of noise o displacements, are shown in order to establish the spatial and frequency li mils of this method. Finally, experimental results are presented that show the possibility and the advantages that such an approach offers using real measurements
Leclere, Quentin. "ETUDE ET DEVELOPPEMENT DE LA MESURE INDIRECTE D'EFFORTS - Application à l'identification des sources internes d'un moteur Diesel." Phd thesis, INSA de Lyon, 2003. http://tel.archives-ouvertes.fr/tel-00415989.
Le, Roux Erwan. "Identification des excitations aéroacoustiques par problème inverse vibratoire dans le domaine temporel." Electronic Thesis or Diss., Le Mans, 2023. http://www.theses.fr/2023LEMA1036.
Qualifying the acoustic performances of structures that are submitted to a boundary layer excitation is a complex and expensive process. In order to make it more accessible and reproducible, the VIRTECH project aims to identify the acoustic pressure that is generated by such excitation. As it is difficult to discriminate the acoustic part from the aerodynamic part with a direct measurement, an inverse vibration method has to be used, that can analyze the response in vibration of a structure submitted to boundary layer excitation. The Corrected Force Analysis Technique (CFAT), has already been successfully used to identify such pressure field in the frequency domain. Here, a time domain application is proposed, as well as another variant of the method, that could potentially be used to identify excitation on more complex structures, such as plane shells
Benmohammed, Brahim. "Identification des lois d'effort de coupe de tournage en regime dynamique." Paris, ENSAM, 1996. http://www.theses.fr/1996ENAM0015.
Maurel-Pantel, Aurelien. "Etude expérimentale et modélisation par éléments finis du procédé de fraisage : Applications à l'identification paramétrique des lois de comportement." Phd thesis, Université de Franche-Comté, 2009. http://tel.archives-ouvertes.fr/tel-00561446.
Leborne, François. "Contributions à la commande de bras manipulateurs de robot sous-marin pour la manipulation à grande profondeur d'échantillons biologiques déformables." Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTS044/document.
The research carried out in the scope of this doctorate degree aims to develop innovative techniques to improve the collection of biological and mineral samples underwater using robotic manipulators. The end goal is to enhance the handling by robotic means in order to maximise sample quality provided to marine scientists. The proposed techniques are based on an in-depth analysis of the robotic arm actuators used in most recent underwater intervention vehicles, in order to improve the accuracy of the positionning of the tools held by the manipulator arms. An instrumented tool has also been developed with the aim to measure the reaction forces and adapt the interaction between the arm's end-effector and its environment to improve samples handling. These methods and the other contributions described in this thesis have been experimentally validated using Ifremer's hybrid-ROV Ariane equipped with two electrically actuated heterogeneous robotic arms
Ponce, Quiroga Carlos Wilfrido. "Improving the productivity of Collaborative Robots in the context of manufacturing companies : identification and control improvement." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0063.
The combination of human capabilities and dexterity with the machine efficiency has been a dream for decades. Technology plays a vital role in helping humans work more efficiently. Thus, collaborative robots have attracted much interest in manufacturing companies.The first part of the thesis is dedicated on determining the influence of bending moment on friction and torque transfer in transmissions used in common collaborative robots: Harmonic Drive gearboxes. Due to their great capabilities, they are widely applied in the field of collaborative robots. However, despite all the great advantages they offer, they present several problematic behaviors that affect their overall performance. Therefore, two experimental setups are designed and developed to study three types of Harmonic Drive transmissions. Friction laws are obtained using force transfer diagrams, which are a parametric representation of the equilibrium of a transmission subjected to input and output torque. The results present new parabolic friction laws for this type of transmissions.The essence of the second part is the improvement of the collaboration to reduce the danger of the robot to the human working nearby by avoiding obstacles at maximum operating speed. This improvement is achieved by proper obstacle avoidance and collision-free path planning, focusing on path continuity, final motion times, and average end-effector speed. We propose an offline path planning approach, considering the obstacle model, given an initial linear path from pose A to pose B. The obstacle model allows to examine in detail the performance of the trajectory in terms of time and traveled distance.The trajectory planning aims to avoid the obstacle using a series of arcs. A variation of Dubins curves defines the path planning. A set of low-computation equations (using radius, sagittas, tangents, etc.) meets the following requirements: (i) C1 continuity at the meeting points of the different segments (equal direction and magnitude of the tangents), (ii) minimum orthogonal and longitudinal distance of the new path, relative to the original path and the obstacle (main arrow and chord). From the general study in 2D, we develop the corresponding equations in 3D.The path planning equations are computed and validated in MATLAB. Then, the libraries and modules are transferred to the Python language, language supported by the robotics simulation framework: ROS and MoveIt, with application to the UR10e cobot.The simulation results validate the feasibility of the obstacle avoidance planner. These are then adapted to the real robot and improved to address certain issues when using the simulation methodology. The control of the end-effector speed is achieved and trajectories are evaluated in terms of total distance traveled by the end effector, total task time, average linear velocity of the movement, and resulting joint positions and velocities. The evaluation allows a quantitative comparison to rank the best trajectories