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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.
161

Development of a Heavy Truck Vehicle Dynamics Model using Trucksim and Model Based Design of ABS and ESC Controllers in Simulink

Rao, Shreesha Yogish 11 July 2013 (has links)
No description available.
162

Hardware in the Loop Simulation of a Heavy Truck Braking System and Vehicle Control System Design

Ashby, Ryan Michael 09 August 2013 (has links)
No description available.
163

Resilience and Toughness Behavior of 3D-Printed Polymer Lattice Structures: Testing and Modeling

Al Rifaie, Mohammed Jamal 21 August 2017 (has links)
No description available.
164

Development of PMSM and drivetrain models in MATLAB/Simulink for Model Based Design / Utveckling av PMSM och drivlinemodeller i MATLAB / Simulink för modellbaserad design

Sivaraman, Gokul January 2021 (has links)
When developing three-phase drives for Electric Vehicles (EVs), it is essential to verify the controller design. This will help in understanding how fast and accurately the torque of the motor can be controlled. In order to do this, it is always better to test the controller using the software version of the motor or vehicle drivetrain than using actual hardware as it could lead to component damage when replicating extreme physical behavior. In this thesis, plant modelling of Permanent Magnet Synchronous Machine (PMSM) and vehicle drivetrain in MATLAB/Simulink for Model Based Design (MBD) is presented. MBD is an effective method for controller design that, if adopted can lead to cost savings of 25%-30% and time savings of 35%-40% (according to a global study by Altran Technologies, the chair of software and systems engineering and the chair of Information Management of the University of Technology in Munich) [1]. The PMSM plant models take effects like magnetic saturation, cross- coupling, spatial harmonics and temperature into account. Two PMSM models in d-q frame based on flux and inductance principles were implemented. Flux, torque maps from Finite Element Analysis (FEA) and apparent inductance from datasheets were used as inputs to the flux- and inductance-based models, respectively. The FEA of PMSM was done using COMSOL Multiphysics. The PMSM model results were compared with corresponding FEA simulated results for verification. A comparison of these PMSM models with conventional low fidelity models has also been done to highlight the impact of inclusion of temperature and spatial harmonics. These motor models can be combined with an inverter plant model and a controller can be developed for the complete model. Low frequency oscillations of drivetrain in EVs lead to vibrations which can cause discomfort and torsional stresses. In order to control these oscillations, an active oscillation damping controller can be implemented. For implementation of this control, a three-mass mechanical plant model of drivetrain with an ABS (Anti-lock Braking System) wheel speed sensor has been developed in this thesis. Analysis of the model transfer function to obtain the pole zero maps was performed. This was used to observe and verify presence of low frequency oscillations in the drivetrain. In order to include the effects of ABS wheel speed sensor and CAN communication, a model was developed for the sensor. / Testning av regulatorernas inställningar med hänsyn till snabbhet och noggrannhet i momentreglering är avgörande i trefasiga drivsystem för elektriska fordon. Oftast är det bättre att simulera i stället för att utföra experimentella tester där komponenter kan skadas på grund av fysisk stress. Detta kallas för Model Based Design (MBD). MBD är an effektiv metod för utformningen av styrningen som kan leda till kostnadsbesparingar på 25%-30% och tidsbesparingar på 35%-40% enligt en studie från Altran Technologies i samarbete med Tekniska universitet i München, TUM. Detta examensarbete behandlar en modell för en synkronmaskin med permanentmagneter (PMSM) samt en modell för drivlinan utvecklad i Matlab/Simulink för MBD. PMSMs modellen inkluderar magnetisk mättnad och tvärkoppling, MMF övervågor och temperatur. Två PMSM modeller har utvecklats. Den första baseras på magnetiskt flöde som erhålls från finita element beräkningar i COMSOL Multiphysics medan den andra bygger på induktanser givna från datablad. En jämförelse av dessa PMSM-modeller med konventionella low fidelity-modeller har också gjorts för att illustrera påverkan temperaturberoende och MMF övervågor. Modellerna kan kombineras med en växelriktarmodell för att utveckla en hel styrenhet. Lågfrekventa oscillationer i drivlinan leder till vibrationer som kan orsaka vridspänningar och försämra komforten i elfordonet. En aktiv dämpningsregulator kan implementeras för att kontrollera spänningarna men en mekanisk drivlinemodell med tre massor och en ABS (anti-lock braking system) hastighetssensor behövs. Den mekaniska modellen har implementerats och analyserats även beaktande en modell för en CAN kommunikationskanal. Oscillationer med låg frekvens kunde observeras i modellen.
165

Semi-analytische und simulative Kreditrisikomessung synthetischer Collateralized Debt Obligations bei heterogenen Referenzportfolios / Unternehmenswertorientierte Modellentwicklung und transaktionsbezogene Modellanwendungen / Semi-Analytical and Simulative Credit Risk Measurement of Synthetic Collateralized Debt Obligations with Heterogeneous Reference Portfolios / A Modified Asset-Value Model and Transaction-Based Model Applications

Jortzik, Stephan 03 March 2006 (has links)
No description available.
166

Étude comparée de l’intégration juridique de la tradimédecine dans les systèmes de santé publique en Afrique de l’Ouest : les cas du Ghana et du Burkina Faso / Comparative study of traditional medicine and pharmacopeia legal framework within West Africa public health systems : the cases of Ghana and Burkina Faso

Ouedraogo, Wendkouni Adelphe Sabine 31 January 2019 (has links)
La médecine et la pharmacopée traditionnelles ouest-africaine constituent encore aujourd'hui, l'unique moyen de prise en charge des maladies pour des milliers de personnes vivant en zone rurale et même en zone urbaine. Cette réalité est souvent présentée comme découlant uniquement de la faiblesse du système allopathique de santé, cependant, elle peut être le fruit d'un choix socioculturel. En effet, les conceptions traditionnelles des maladies, c’est-à-dire la distinction entre maladies naturelles et maladies provoquées influencent encore le choix thérapeutique dans les communautés africaines surtout en zone rurale. Pendant longtemps, ce retour à la médecine et à la pharmacopée traditionnelle s'est fait sans la mise en place des mesures d'encadrement et d'accompagnement nécessaires. Ce qui engendre d’énormes risques sanitaires. De plus, la multiplication des bio-prospections sans contrôle des États a conduit à une forte croissance des appropriations illicites des savoirs tradimédicaux. Cet état des faits a fait émerger au sein des institutions internationales compétentes de nouvelles questions : celles des droits des communautés locales et autochtones sur leurs ressources et leurs savoirs tradimédicaux associés, et la nécessité de la construction d'un système équitable d'exploitation des ressources et des savoirs médicaux traditionnels à des fins de recherches et de développement. Les États burkinabè et ghanéen ont, pour pallier ces difficultés, adopté des législations encadrant les pratiques traditionnelles de soins ainsi que la production et la mise sur leurs marchés nationaux de médicaments traditionnels et néo traditionnels / Traditional medicine and pharmacopeia are still nowadays for thousands of people in West Africa, the unique healthcare solution. If this fact is often considered as arising solely from the weakness of the allopathic health system, it could also be a result of socio-cultural choices. Indeed, people especially in rural areas are strongly influenced by traditional vision and beliefs about diseases’ origins, which could have natural or induced causes in this traditional conception. For a long time, this resort to traditional medicine was done without the supervision and support of the appropriate measures and regulations. This has generated high public healthcare risks. Moreover, the multiplication of bioprospection’s without states control has led to a sharp increase in illicit appropriation of traditional medicine knowledge for the purposes of pharmaceutical innovation. This has created new issues in the South, especially about local populations’ intellectual property on their traditional knowledge. Highlighting these facts has raised new concerns within the competent international and regional institutions: the need of protection for local and indigenous communities’ rights over their genetic resources and associated tradimedical knowledge, and the need of building a fair system of exploitation of resources and medical indigenous knowledge for purposes of research and development. The Burkinabe and Ghanaian states have, in order to overcome these issues, adopted legislations to regulate traditional care practices as well as the production and placement on their national markets of traditional and neo-traditional medicines
167

Návrh a výroba plastové součásti / Design and production of a plastic komponent

ČÍŽEK, Václav January 2013 (has links)
The theoretical part is focused on evaluation of chosen ?essential? plastics used in the car industry. The principles of construction and proportioning of plastic components, basic conception of injection moulding and measuration follow. Another section of the theoretical part presents a summary of possible CAD systems, which are used. The practical part is focused on a particular plastic moulding. It includes the main description of a component with its material choice in dependence on the component function. Another section contains evaluation of the component complexity from the viewpoint of moulding, and a possible substitution of constructions, which could be productively simpler, is shown. The whole thesis is completed for better lucidity by pictures, drawings, and mechanical drawings.
168

Conventions réglementées et intérêt social en droit comparé (Liban, France, USA) / Related party transactions and corporate interest in comparative law (Lebanon, France, USA)

Zreik, Saba 04 March 2011 (has links)
L’intérêt social est la raison d’être principale de la règlementation des conventions réglementées. Il est délimité par des intérêts voisins et par l’intérêt personnel abrité par ces conventions, dont le jeu conflictuel peut léser la société. L’existence d’un conflit et de sa justification peuvent être présumées. L'intérêt social est désormais celui de l’entreprise vue dans son contexte économique large. Un intérêt de groupe est distinctement reconnu. La qualification des conventions sert à identifier celles qui doivent être contrôlées. La mise en oeuvre de la protection de l’intérêt social s’opère à travers la prévention des conflits d’intérêts, moyennant une révélation de l'intérêt personnel. Cette révélation déclenche la procédure d'appréciation par les organes sociaux concernés. Des garanties législatives et jurisprudentielles assurent la primauté de l’intérêt social, par la limitation de l’exercice de certains droits et par l’application judiciaire stricte du respect des obligations légales qui pèsent sur les intéressés. La convention frauduleuse est nulle. Celle non autorisée qui est préjudiciable à la société est annulable; et ses conséquences sont supportées par l’intéressé qui engage sa responsabilité civile et même parfois sa responsabilité pénale. La comparaison du traitement de ce sujet dans les trois systèmes juridiques libanais, français et américains a dévoilé des failles dans les deux premiers ; des projets de réforme sont proposés. / The corporate interest is the main reason behind the regulation of related party transactions. Its limits are defined by similar interests and the personal interest embodied in these transactions. The inter-action of these conflicting interests may harm the company. The existence of a conflict and of its justification may be presumed. The corporate interest is from now on that of the enterprise seen within its wide economic context and the interest of a group of companies is distinctively acknowledged. The qualification of those transactions helps identify those that are subject to scrutiny. The protection of the corporate interest is achieved by the prevention of the conflicts of interests through the disclosure of the personal interest. This disclosure triggers the concerned corporate bodies’ evaluation process. Legislative and jurisprudential guarantees ensure the predominance of the corporate interest through limitations on the exercise of certain rights and a strict judicial enforcement of legal duties laid on the interested party. The fraudulent transaction is void. The unauthorized one that is damaging to the company is voidable and its consequences are assumed by the interested party who may be exposed to civil and, sometimes, criminal liability. The comparison of the treatment of this subject in the Lebanese, French and American legal systems revealed the weaknesses in the first two; amendment proposals are made.
169

Berücksichtigung der ausländischen Eingriffsnormen im Art. 9 Rom I-VO

Mühlbauer, Kristina 29 June 2021 (has links)
Die Arbeit setzt sich mit dem neuen europäischen Anknüpfungskonzept für ausländisches Eingriffsrecht in der Rom I-VO auseinander. Im Fokus der Untersuchung steht die politisch motivierte und restriktiv ausgefallene Regelung des Art. 9 Abs. 3 Rom I-VO. Zudem widmet sich ein Teil der Untersuchung allgemein der hinter dem Eingriffsrecht – insbesondere dem Konzept des ausländischen Eingriffsrechts im IPR – stehenden Dogmatik, die aus einer dogmatisch-historischen Perspektive beleuchtet wird. Schwerpunktmäßig gilt es der Frage nachzugehen, welche Überlegungen hinter der neuen Kollisionsnorm stehen und ob die Sonderanknüpfung des Art. 9 Abs. 3 Rom I-VO einen dogmatisch geeigneten, mit der Zielsetzung der Rom I-VO vereinbaren rechtlichen Rahmen für die einheitliche kollisionsrechtliche Berufung der berücksichtigungswürdigen ausländischen Eingriffsnormen in den Mitgliedstaaten schafft. / The thesis examines the European concept of the newly defined connecting factor for foreign overriding mandatory rules in the Rome I Regulation. The central attention of the study is the analysis of the politically motivated and restrictive regulation of Art. 9 (3) of the Rome I Regulation. In addition, the first part of the study is dedicated to the examination of the general approach behind the application of foreign overriding mandatory rules in private international law from a dogmatic-historical perspective. The main focus of the thesis, however, is on the research of the considerations behind the new conflict of laws rule. The author specifically questions whether the new connecting factor defined in the Art. 9 (3) Rome I Regulation provides a worthy and sufficient legal framework for the application of foreign overriding mandatory rules.
170

Low Velocity Impact and RF Response of 3D Printed Heterogeneous Structures

Keerthi, Sandeep January 2017 (has links)
No description available.

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