Download or read book METHODOLOGIE POUR L ELABORATION DE MODELES DE COMPORTEMENT DE ROBOTS MANIPULATEURS SUJETS A DES DEFORMATIONS ELASTIQUES written by PETER.. MITROUCHEV and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE THESE A POUR OBJET D'APPORTER UNE CONTRIBUTION A LA MODELISATION DES ROBOTS-MANIPULATEURS SUJETS A DEFORMATION ELASTIQUE. LES MODELISATIONS GEOMETRIQUE ET CINEMATIQUE SONT BASEES SUR UNE REPRESENTATION DU MOUVEMENT COMME LA COMBINAISON LINEAIRE D'UN MOUVEMENT RIGIDE ET D'UN MOUVEMENT COMPLEMENTAIRE DU AUX DEFORMATIONS ELASTIQUES DE LA STRUCTURE. LE MODELE DYNAMIQUE EST OBTENU EN UTILISANT LES METHODES CLASSIQUES DE NEWTON-EULER ET DE LAGRANGE ET DES METHODES D'ANALYSE DES STRUCTURES: ANALYSE MODALE ET METHODE DES ELEMENTS FINIS. L'IDENTIFICATION DYNAMIQUE DE LA STRUCTURE D'UN ROBOT PAR ESSAIS D'ANALYSE MODALE EST PRESENTEE. LA METHODE DE RAIDEUR DYNAMIQUE EST ENSUITE UTILISEE POUR LA DETERMINATION AUTOMATIQUE EN SIMULATION DE FREQUENCES PROPRES D'UN ROBOT. DIFFERENTS LOGICIELS ONT ETE DEVELOPPES ET SONT EN COURS D'INTEGRATION DANS LE CADRE D'UNE APPLICATION METIER AU LOGICIEL EUCLID-IS 210 SUR VAX-VMS

Download or read book M thodologie pour l laboration de mod les de comportement de robot manipulateurs sujets des d formations lastiques written by Peter Mitrouchev and published by . This book was released on 1992 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mod lisation et identification lastodynamiques des robots manipulateurs written by Mathieu Rognant and published by . This book was released on 2010 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le transstockeur TGD50, robot manipulateur industriel développé par les sociétés SYDEL et SEDEP, est utilisé dans le domaine du stockage automatisé. L’objectif premier de cette thèse est d’étudier le comportement élastodynamique de ce manipulateur, afin de définir les modifications à lui apporter pour améliorer ses performances. Dans un premier temps, un diagnostic expérimental de ce transstockeur a été réalisé : celui-ci a permis d’identifier les limites de ce manipulateur et de valider les hypothèses de modélisation. Une méthodologie de modélisation capable de décrire le comportement élasto-dynamique du transstockeur TGD50 est ensuite développée, permettant d’intégrer les différentes hypothèses retenues lors de la phase de diagnostic. Cette méthodologie est validée expérimentalement, puis mise en oeuvre dans une démarche de conception, conduisant à l’élaboration d’une nouvelle structure dont le volume de travail est accru pour un encombrement au sol inchangé. Enfin, la démarche de diagnostic expérimental ainsi que la méthodologie de modélisation sont appliquées avec succès sur un manipulateur à structure parallèle de type Delta à des fins d’identification. Les résultats alors obtenus montrent la pertinence et la généricité des procédures proposées dans cette thèse. Celles-ci constituent des outils adaptés aussi bien à la conception mécanique qu’à l’identification en vue de la commande.

Download or read book Handbook of ICU EEG Monitoring written by Suzette LaRoche and published by Demos Medical Publishing. This book was released on 2012-12-20 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pearls and take-home points highlighted in every chapter.

Download or read book Dynamics and Control of Underactuated Multibody Spacecraft written by Sangbum Cho and published by . This book was released on 2002 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Filtering for Some Stochastic Processes with Discrete Observations written by Oleg V. Makhnin and published by . This book was released on 2002 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book On Propagating Instabilities in Nickel titanium Steel Alloys written by Mark Anthony Iadicola and published by . This book was released on 2002 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Guidance Strategies for Microburst Escape written by Atilla Dogan and published by . This book was released on 2000 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance Prediction of a Ducted Rocket Combustor microform written by Robert Alan Stowe and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 2001 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fixed structure Adaptive improvement Control written by Daniel P. Scharf and published by . This book was released on 2001 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Numerical Investigation of Sound Generation in Supersonic Jet Screech written by Ted A. Manning and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The noise of supersonic jet flows is due in part to the interaction between jet instability waves and the jet shock-cell structure. If no countermeasures are taken, the emitted shock-cell noise will re-excite certain instability wave modes at the nozzle lip and cause resonant feedback to occur. This feedback resonance, known as supersonic jet screech, causes the jet to flap violently at discrete frequencies and generate very strong, narrow banded tones. Jet screech has been shown to be a source of acoustic fatigue in the tail and nozzle structures of supersonic aircraft. It is important that methods for predicting the screech amplitude be developed. Screech sound generation is one such element. We isolate the interaction of an unsteady shear layer with a single oblique shock. To obtain an overall understanding of the phenomenon with fewest simplifications, we study this problem through the numerical solution of the Navier Stokes equations. We then consider idealizations which allow us to obtain a similar but wider range of results with specially linearized Euler equations. The findings of these r0sults motivate the use of geometric acoustics to describe the screech generation process. The Navier-Stokes and Euler simulations have revealed important details about the interaction process, how the acoustic field results, and why screech is so loud. The mechanism for sound production is found to be fundamentally different and more efficient when the instability waves are the large vortices typical of screech, than when they are small disturbances. Geometrical acoustics can be used to explain the leakage effect at high instability wave amplitude. We conclude that the mechanism for high amplitude screech generation is an unsteady modification to the velocity field by the instability waves that permits the incident shock to refract through the shear layer.

Download or read book Adaptive Harmonic Balance Method for Unsteady Nonlinear One Dimensional Periodic Flows written by Raymond C. Maple and published by . This book was released on 2002-09-01 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new adaptive split-domain harmonic balance computational fluid dynamics (CFD) method is developed to solve highly nonlinear time-periodic flows such as those found in turbomachinery. The basic harmonic balance CFD method transforms an unsteady time-periodic problem into a steady-state problem by assuming a solution in the form of a Fourier series in time. The new method employs a unique multi-domain split-operator solution technique to remove a large-series stability restriction present in previous harmonic balance CFD approaches. In addition, the new method adapts the frequency content to the flow, starting with a small number of Fourier frequencies and augmenting the frequency content in each cell as necessary to capture local flow physics. The method reduces compute times by allowing larger integration time steps, eliminating Fourier transforms, and reducing overall problem size. The stability and accuracy of the method are verified with solutions to the 1-D inviscid Burger's equation and 1-D Euler's equation. Accurate adapted quasi-1-D Euler solutions for a supersonic/subsonic diverging nozzle with periodic unsteady outflow conditions are generated in 86% less time than an equivalent non-adapted split-domain solution, demonstrating the performance benefit of matching frequency content to the local flow conditions.

Download or read book Engine Airframe Integration written by and published by . This book was released on 1992 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Velocity and Vorticity Fields of a Single Stream Shear Layer written by Scott Christopher Morris and published by . This book was released on 2002 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Properties of Spray Formation by Turbulent Primary Breakup written by Khaled A. Sallam and published by . This book was released on 2002 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Investigation of the Physical Vapor Deposition of Titanium written by Jitendra Balakrishnan and published by . This book was released on 2001 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: