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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
151

Nouveaux outils pour l'animation et le design : système d'animation de caméra pour la stop motion, fondée sur une interface haptique et design de courbes par des courbes algébriques-trigonométriques à hodographe pythagorien / New tools for animation and design : a haptic-based system for stop motion camera animation and curve design by algebraic-trigonometric Pythagorean Hodograph curves

Saini, Laura 13 June 2013 (has links)
Dans la première partie de la thèse, nous présentons un nouveau système permettant de produire des mouvements de caméra réalistes pour l’animation stopmotion. Le système permettra d’enrichir les logiciels d’animation 3D classiques (comme par exemple Maya et 3D Studio Max) afin de leur faire contrôler des mouvements de caméra pour la stop motion, grâce à l’utilisation d’une interface haptique. Nous décrivons le fonctionnement global du système. La première étapeconsiste à récupérer et enregistrer les données envoyées par le périphérique haptique de motion capture. Dans la seconde étape, nous réélaborons ces données par un procédé mathématique, puis les exportons vers un logiciel de 3D pour prévisualiser les mouvements de la caméra. Finalement la séquence est exécutée avec un robot de contrôle de mouvement et un appareil photo. Le système est évalué par un groupe d’étudiants du Master "Art plastiques et Création numérique" de l’Université de Valenciennes. Dans la deuxième partie, nous définissons une nouvelle classe de courbes à partir des courbes polynomiales paramétriques à hodographe pythagorien (PH) construite sur un espace algébrique-trigonométrique. Nous montrons leurs propriétés fondamentaleset leurs avantages importants par rapport à leur équivalent polynomial, grâce à l’utilisation d’un paramètre de forme. Nous introduisons une formulation complexe et nous résolvons le problème d’interpolation de Hermite. / In the first part, we present a new system that allows to create realistic cameramovements for a stop motion animation. The system improves traditional 3D software animation programs (for example Maya and 3D Studio Max) for creatingstop motion camera movements by using an haptic interface. After describing thewhole system, we explain in detail the mathematical processing to obtain differentcamera movements by using an haptic interface for motion capture. The recordedhaptic positions, once elaborated, are exported, frame by frame, to the motioncontrol software, which allows to calibrate the motion control robot, to control thecamera settings and, finally, to execute the sequences. A class of students of the"Art plastiques et Création numérique" Master of the University of Valenciennesevaluated the system. In the second part, we define a new class of Pythagorean Hodograph curves built upon a five dimensional mixed algebraic trigonometric space, and show their fundamental properties and important advantages over their well known polynomial counterpart. A complex representation for these curves is introduced and constructive approaches are provided to solve the first order Hermite interpolation problem.
152

Návrh pohonu laminovacího zařízení / Drive design for Foil Winding Machine

Koncer, Adam January 2014 (has links)
Master’s thesis deals with the realization of motion drives for the foil winding machine. Drives for this machine are supplied by company Siemens. Whole project is made in cooperation with that company. The reader gets a comprehensive overview of the product group SINAMICS that will be used for the realization of drives in this machine. Thesis describes the selection of individual drive components, their control and regulation. Measurement and evaluation of results foil winding machine is made in the last chapter of this thesis.
153

Řízení balícího stroje s použitím Safety PLC / Control of packaging machine using Safety PLC

Žiak, Martin January 2017 (has links)
This thesis deals with a technology of continuous packaging machine in the beginning from the point of risk assessment and design of necessary measures to reduce the risk as much as it is possible. Here the HRN method was used to quantify every risk factor. Next part documents the implementation of the safety measures and the realization of the safety circuits by using Simatic S7–1500F safety PLC and Shared device functionality. Safety function which is realized in the Sinamics S120 drive is Safe Stop 1. Next, it describes the drive dimensioning and the principle of the drive control. Simotion PLC is discussed in more details and then is used as a motion control master. An approach to the configuration of camming synchronous operation is dealt with in details. Cam design and their realization is documented, too. The thesis also demonstrates the state manager that was implemented in the user program and which is used according to the concept of OMAC state manager. In the end a simple HMI for packaging machine control is described.
154

Electrohydrostatic actuation system – an (almost) complete system view

Becher, Dirk 25 June 2020 (has links)
Electro-hydrostatic Actuation Systems (EAS) successfully combine the advantages of electro-mechanical actuation - such as high-energy efficiency and low noise emission - with the benefits of electro-hydraulic technology –which include robustness and the precise handling of large forces. This paper defines keywords like EAS and Electro-hydraulic pump unit (EPU), and provides a comparison of the two technologies. Given the wide range of EAS technology topics, it is only possible to briefly introduce and discuss these in this paper. This technology has reached a level that renders it a strong mechanism for machine manufacturers to support existing and future motion control requirements.
155

The roof wing opening system of the UAE pavilion at EXPO 2020

Leutenegger, Paolo, Vergano, Carlo, Herzinger, Rainer, Weber, Jürgen, Bassetto, Nicola, Belluschi, Fabio, Cardani, Riccardo, Costin, Ina, Codari, Costanzo, Ferla, Stefano, Forti, Giovanni, Köhler, Simon, Maddalon, Roberto, Pari, Gino, Panev, Daniel, Pavanetto, Michele, Poli, Christian, Ripamonti, Massimo, Rossignoli, Alessandro, Trau, Matteo, Uhlmann, Jonas, Zaltieri, Renzo 26 June 2020 (has links)
The UAE Pavilion will be a major attraction at Expo 2020 in Dubai. The roof of the building consists of 28 operable wings made of carbon and glass fiber, having masses ranging from 5 to 18 tons and total lengths in the range of 30 to 65 m that have to be actuated by a dedicated mechanism. In this paper we present the turn-key project for the design, manufacturing, installation, test and commissioning of the Roof Wing Opening System, which represents a unique system world-wide for operating the wings. It consists of one Hydraulic Power Unit with approximately 1 MW of installed power, 2 km of piping working at the nominal pressure of 210 bar, 46 hydraulic cylinders with 1.5 tons of mass each and the complete automation and control subsystem that includes 9 separate PLCs, dedicated software, 2.000 sensors and control points, and over 20 km of harness. One major challenge is the control of the wings. Part of them, due to their huge dimensions and masses, are actuated using two or three hydraulic cylinders that have to be properly synchronized during the movement, preventing unwanted displacements in order to avoid stresses on the wing mechanical structure and ultimately permanent damages. Due to the nature of the project, a final validation of the control algorithms can be done only at system level during the commissioning phase. Therefore, particular care has to be devoted to the verification strategy, anticipating the behavior of the system in the early validation stages and following a V-model approach, in order to identify critical situations and reduce the overall risk. After a brief system description, we will explain how the verification has been approached by using system level simulations and dedicated testing activities on specific subsystems. In particular, we will detail the verification of the control algorithms that has been performed on a dedicated Hardware-Inthe- Loop system first, followed then by dedicated tests on a reduced wing mock-up, allowing the study of the system behavior under the most critical conditions. These include the application of external forces with specified profiles. Finally, we will provide the actual status of the system installation, testing and commissioning activities that have been running in Dubai since January 2019.
156

IDENTIFICATION OF MOTION CONTROLLERS IN HUMAN STANDING AND WALKING

Huawei, Wang 11 May 2020 (has links)
No description available.
157

Разработка учебно-лабораторного комплекса по мехатронике и робототехнике : магистерская диссертация / Development of the mechatronics and robotics education-laboratory unit

Клюхин, М. В., Klyukhin, M. V. January 2021 (has links)
Цель работы – спроектировать и реализовать аппаратную и программную часть учебно-лабораторного комплекса по мехатронике и робототехнике. Определены основные требования к объекту, требования проанализированы, и на их основе разработан комплекс на основе стенда по автоматизированному электроприводу и робота-манипулятора. / The aim of the work is design and implementation the hardware and software parts of the educational unit for mechatronics and robotics education. The basic requirements for the unit have been determined, the requirements have been analyzed, and on their basis a unit that consists of an automated electric drive and a robotic manipulator has been designed.
158

Модернизация электропривода и автоматики дробеметной установки : магистерская диссертация / Upgrade of the electric drive and the automation system of the shot blaster unit

Бойцов, Н. П., Boytsov, N. P. January 2022 (has links)
Объект исследования – процесс изучения автоматизации производственных предприятий. Предмет исследования – дробеметная установка модели 24634Т. Цель работы – разработать проект на модернизацию дробеметной установки 24634Т. В ходе выполнения работы определены основные требования к объекту, требования проанализированы, и на их основе разработан проект на модернизацию. / The object of research is the process of studying the automation of manufacturing enterprises. The subject of the study is the shot blasting unit model 24634T. The aim of the dissertation is to develop a project for the modernization of the shot blasting unit 24634T. In the course of the work, the main requirements were determined, the requirements were analyzed, and on their basis a project for modernization was developed.
159

PERCEPTION AND CONTROL OF AN MRI-GUIDED ROBOTIC CATHETER IN DEFORMABLE ENVIRONMENTS

Tuna, Eser Erdem 21 June 2021 (has links)
No description available.
160

Reconstruction and Control of Tip Position and Dynamic Sensing of Interaction Force for Micro-Cantilever to Enable High Speed and High Resolution Dynamic Atomic Force Microscopy

Liu, Zhen 18 May 2017 (has links)
No description available.

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