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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.
11

Biomechanical Characterization of the Human Upper Thoracic Spine – Pectoral Girdle (UTS-PG) System: Anthropometry, Dynamic Properties, and Kinematic Response Criteria for Adult and Child ATDs

Stammen, Jason Anthony 29 August 2012 (has links)
No description available.
12

DESIGN REQUIREMENTS OF HUMAN-DRIVEN,HYBRID, AND AUTONOMOUS TRUCKS FOR COLLISION-AVOIDANCE IN PLATOONING

Shreyas Shanker (18136627) 03 June 2024 (has links)
<p dir="ltr">In this thesis, a MATLAB model was used to simulate a 2-vehicle platoon where the lead truck is a conventional class 8 vehicle while the key parameters of the following truck was tested in various road conditions to minimize Inter vehicular Distance (IVD) and maximize fuel savings while ensuring safety</p>
13

Designing and Evaluating a SIL4 DC Motor Controller / Designa och Utvärdera en SIL4 DC-Motorstyrenhet

Zhang, Xinye January 2024 (has links)
Railway safety is an issue that is closely related to people. Hazards such as a collision between two trains can result in severe casualties, necessitating the utmost level of safety measures. Linear actuators control the direction of the train and are critical devices in train operation. Therefore, the safety requirements for linear actuators are high; several internationally accepted standards can help regulate the design of railways and specify safety standards. EN 50129 and EN 50126 are critical standards to follow. This thesis presents two motor controller designs that can be used in linear actuators with high safety quality. This thesis contains two designs, a basic design and an advanced design. The first part of the thesis is the basic design. The basic design is based on the full bridge structure and combines two out of two logic. After integrating metal-oxide-semiconductor field-effect transistors, gate drivers, and DC-DC converter, the basic design is presented following the safety integrated level 4 requirements of EN 50129. A fault tree analysis and a common cause failure analysis are added. The failure rate after fault tree analysis is 2E −14 . The second part of the thesis presents an advanced design based on the basic design and introduces an Automotive Safety Integrated Level D-compliant gate driver according to ISO 26262. It improves the previous design of the DC full bridge to have about 50 percent fewer components. Meanwhile, the advanced design also gives a supplement and refinement of the basic design to advance the possibility of practical application. Failure tree analysis failure mode effects, criticality analysis analysis, and availability argument are then carried out with the advanced design. According to fault tree analysis, the failure rate of the advanced design is 2E−14. / Järnvägssäkerhet är en fråga som är nära relaterad till människor. Faror som en kollision mellan två tåg kan resultera i allvarliga olyckor, vilket kräver högsta möjliga säkerhetsåtgärder. Linjära ställdon styr tågets riktning och är kritiska enheter i tågdrift. Därför är säkerhetskraven för linjära ställdon höga; flera internationellt accepterade standarder kan hjälpa till att reglera utformningen av järnvägar och specificera säkerhetsstandarder. EN 50129 och EN 50126 är kritiska standarder att följa. Denna avhandling presenterar två motorstyrningskonstruktioner som kan användas i linjära ställdon med hög säkerhetskvalitet. Detta examensarbete innehåller två designs, en grundläggande design och en avancerad design. Den första delen av examensarbetet är den grundläggande designen. Den grundläggande designen är baserad på hela brostrukturen och kombinerar två av två logik. Efter att ha integrerat metall-oxid-halvledarfälteffekttransistorer, gate-drivrutiner och DC-DC-omvandlare presenteras den grundläggande designen enligt de säkerhetsintegrerade nivå 4-kraven i EN 50129. En felträdsanalys och en analys av vanlig orsaksfel läggs till. Felfrekvensen efter felträdsanalys är 2E−14. Den andra delen av avhandlingen presenterar en avancerad design baserad på den grundläggande designen och introducerar en Automotive Safety Integrated Level D-kompatibel grinddrivare enligt ISO 26262. Den förbättrar den tidigare designen av DC-fullbryggan för att ha cirka 50 procent färre komponenter. Samtidigt ger den avancerade designen också ett komplement och förfining av den grundläggande designen för att främja möjligheten till praktisk tillämpning. Felträdanalys fellägeseffekter, analys av kritikalitet och tillgänglighetsargument utförs sedan med den avancerade designen. Enligt felträdsanalys är felfrekvensen för den avancerade designen 2E−14.
14

The Study of Behavior of Passenger Car-Semi-Autonomous Trailer Connections under Load

Yury Kuleshov (11187051) 27 July 2021 (has links)
<div><p>A variety of passenger car-trailer connections exist on the market. One specific type of the connections provides a tensile force measurement capability for the purpose of providing feedback for the semi-autonomous trailer’s control system. Semi-autonomous trailer is an innovative technology that can encourage drivers to use smaller vehicles for towing, which will contribute to restoration and improvement of urban infrastructure (NAE Grand Challenges for Engineering, 2020). The vehicle-semi-autonomous trailer connection’s safety concerns depend on multiple factors, but start with either a mechanical, or an electrical failure. The topic of safety of passenger car-semi-autonomous trailer connections is not well present in literature. The connections’ mechanical failures under load are in the focus of this work. The author addressed the following research question and the sub question. How do the existing “passenger car-trailer” connections with tensile force measurement capability compare to one another under load in terms of the possible failure? What is the failure mode of each of the compared connections? The author selected three prototypes from the literature, built three-dimensional (3D) models in SolidWorks 2018 and simulated the tests in the program’s add-on in accordance with the requirements of an industry standard on real-life testing of specific vehicle systems. The author compared the three prototypes by a number of different parameters. The research showed that none of the three existing prototypes are public road-ready in terms of safety. The study can be useful for future designers of passenger-car-semi-autonomous trailer connections.</p></div>

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