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Dissertations / Theses on the topic 'Engineering design Automobiles'
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Fitch, Peder Erik. "Design forecasting : a method for performing DFX analyses in complex product design /." Thesis, Connect to this title online; UW restricted, 2004. http://hdl.handle.net/1773/7135.
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Dravidam, Uttamkumar. "Development of rear-end collision avoidance in automobiles." FIU Digital Commons, 1999. http://digitalcommons.fiu.edu/etd/3084.
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The goal of this work is to develop a Rear-End Collision Avoidance System for automobiles. In order to develop the Rear-end Collision Avoidance System, it is stated that the most important difference from the old practice is the fact that new design approach attempts to completely avoid collision instead of minimizing the damage by over-designing cars. Rear-end collisions are the third highest cause of multiple vehicle fatalities in the U.S. Their cause seems to be a result of poor driver awareness and communication. For example, car brake lights illuminate exactly the same whether the car is slowing, stopping or the driver is simply resting his foot on the pedal. In the development of Rear-End Collision Avoidance System (RECAS), a thorough review of hardware, software, driver/human factors, and current rear-end collision avoidance systems are included. Key sensor technologies are identified and reviewed in an attempt to ease the design effort. The characteristics and capabilities of alternative and emerging sensor technologies are also described and their performance compared. In designing a RECAS the first component is to monitor the distance and speed of the car ahead. If an unsafe condition is detected a warning is issued and the vehicle is decelerated (if necessary). The second component in the design effort utilizes the illumination of independent segments of brake lights corresponding to the stopping condition of the car. This communicates the stopping intensity to the following driver. The RECAS is designed the using the LabVIEW software. The simulation is designed to meet several criteria: System warnings should result in a minimum load on driver attention, and the system should also perform well in a variety of driving conditions.
In order to illustrate and test the proposed RECAS methods, a Java program has been developed. This simulation animates a multi-car, multi-lane highway environment where car speeds are assigned randomly, and the proposed RECAS approaches demonstrate rear-end collision avoidance successfully. The Java simulation is an applet, which is easily accessible through the World Wide Web and also can be tested for different angles of the sensor.
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Zoroufi, Mehrdad. "Manufacturing process effects on fatigue design and optimization of automotive components : an analytical and experimental study." Toledo, Ohio : University of Toledo, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=toledo1100121667.
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Dissertation (Ph.D.)--University of Toledo, 2004.Typescript. "Submitted as partial fulfillment of the requirements for the Doctor of Philosophy in Engineering Science." "A dissertation entitled"--at head of title. Title from title page of PDF document. Bibliography: p. 239-247.
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Zhu, Min. "Design of automotive joints : using optimization to translate performance criteria to physical design parameters /." Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06062008-165515/.
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Sivapurapu, Sai Vinay Kumar Plummer Mitty Charles. "Preliminary design of a cryogenic thermoelectric generator." [Denton, Tex.] : University of North Texas, 2007. http://digital.library.unt.edu/permalink/meta-dc-3612.
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Bagaitkar, Harish. "Design for manufacturing for friction stir welding." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2008. http://scholarsmine.mst.edu/thesis/pdf/Bagaitkar_09007dcc805a2c42.pdf.
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Thesis (M.S.)--Missouri University of Science and Technology, 2008.Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed December 2, 2008) Includes bibliographical references.
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Wang, Chin-Cheng E. "Design and analysis of the natural gas storage tank for automobiles." Ohio : Ohio University, 1998. http://www.ohiolink.edu/etd/view.cgi?ohiou1176236134.
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STELZER, GREGORY JON. "A MAGNETORHEOLOGIC SEMI-ACTIVE ISOLATOR TO REDUCE NOISE AND VIBRATION TRANSMISSIBILITY IN AUTOMOBILES." University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1029363540.
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Keshavarzi, Ferhan Seçkin Yavuz. "The Effect Of Engineering Criteria In The Application Of Cooling System And Air-Condition System Used In Trade Vehicles On Industrial Design Criteria/." [s.l.]: [s.n.], 2006. http://library.iyte.edu.tr/tezler/master/endustriurunleritasarimi/T000381.pdf.
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Li, Jingyun Evans John L. "Alternate in-situ environmental testing system by matrix design." Auburn, Ala, 2009. http://hdl.handle.net/10415/1619.
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Matteson, Arthur W. "Design and control of a multilevel inverter for electric vehicles." Diss., Connect to online resource - MSU authorized users, 2008.
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Subramanian, Arunkumar. "Analysis of the design and operation of mix-bank resequencing areas." MSSTATE, 2004. http://sun.library.msstate.edu/ETD-db/theses/available/etd-08062004-162540/.
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Automotive assembly plants work on a pre-planned job sequence in order to optimize the performance of the assembly line. However, the job sequence becomes scrambled due to factors such as plant layout, process design, variability and uncertainty. Assembly plants use either a mix-bank or an automatic storage and retrieval system to regenerate the sequence before final assembly. A mix-bank, which is a set of parallel lanes, is the most common method used in the automotive industry to reconstruct the sequence. Only the first vehicles on the lanes are available for sequencing in a mix-bank set-up. Hence the lane selection policy and the lane configuration of a mix-bank play crucial roles in recreating the sequence. This thesis addresses the problem of identifying a superior lane selection policy for a mix-bank re-sequencing area. Simulation models of a re-sequencing area are used to evaluate lane selection policies. Varying the lane configurations and the nature of sequence tests the effectiveness of the selection policies.
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Li, Ke. "Automotive engine tuning using least-squares support vector machines and evolutionary optimization." Thesis, University of Macau, 2012. http://umaclib3.umac.mo/record=b2580667.
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Patlu, Srikanth. "Occupant restraint modeling seat belt design." Ohio : Ohio University, 2001. http://www.ohiolink.edu/etd/view.cgi?ohiou1174316672.
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Reuter, Markus Andreas. "The fundamental limits of recycling : from minerals processing to computer aided design of automobiles and other consumer goods." Thesis, Stellenbosch : Stellenbosch University, 2006. http://hdl.handle.net/10019.1/1331.
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Thesis (PhD (Process Engineering)--Stellenbosch University, 2006.My applied engineering research and industrial application work of the past 20 years is presented in this dissertation. It is the conjecture of my work that only if thorough first principles knowledge of the depth of process metallurgy and recycling is available, can meaningful first principles environmental models be developed. These models can then evaluate technology, provide well argued and first principles environmental information to our tax paying consumer society as well as to legislators and environmentalists. Only through this path can one estimate the limits of recycling and its technology, hence evaluate the true boundaries of sustainability. My work with students has presently culminated in the detailed modelling and simulation of recycling systems for post-consumer goods. Notably the models are finding an application in the prediction of legally required recycling rates for automobiles. The models provide first principles arguments for less stringent EU recycling legislation and the integration of the first principles models in computer aided design tools of the automotive industry as part of a large EU 6th Framework (project managed by Volkswagen and the other European car producers). Presently these models are also being converted to model the Waste Electric and Electronic Equipment (WEEE) as well as water recycling systems respectively, both for industry in The Netherlands. This unique rigorous integration of systems engineering, reactor technology and process control theory is the basis of all my work to describe recycling systems as dynamic feedback control loops. My large body of acquired industrial knowledge renders these models practical and can hence be used by the automotive and recycling industries. The origins of this work may be found in the various cited publications and reports to industry by myself (due to my close association with industry as well as industrial experience) over the past 20 years as well as the work of my students, covering topics such as: • system optimization models for flotation, mineral beneficiation and recycling systems and applying these for design for recycling and argue for better/improved first-principles based legislation, • industrial measurement, modelling and simulation of industrial extractive process pyrometallurgical reactors as well waste incinerators and recycling plants, • various activities in other areas such as hydrometallurgy, clean and new breakthrough technology, and • process control of industrial metallurgical reactors by among others the application of artificial intelligence techniques. All the ideas of the last years have been worked out with students and have been summarized in our book: “The Metrics of Material and Metal Ecology, Harmonizing the resource, technology and environmental cycles”.
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Sivapurapu, Sai Vinay Kumar. "Preliminary design of a cryogenic thermoelectric generator." Thesis, University of North Texas, 2007. https://digital.library.unt.edu/ark:/67531/metadc3612/.
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A cryogenic thermoelectric generator is proposed to increase the efficiency of a vehicle propulsion system that uses liquid nitrogen as its fuel. The proposed design captures some of the heat required for vaporizing or initial heating of the liquid nitrogen to produce electricity. The thermoelectric generator uses pressurized liquid nitrogen as its cold reservoir and ambient air as the high-temperature reservoir to generate power. This study concentrated on the selection of thermoelectric materials whose properties would result in the highest efficiency over the operating temperature range and on estimating the initial size of the generator. The preliminary selection of materials is based upon their figure of merit at the operating temperatures. The results of this preliminary design investigation of the cryogenic thermoelectric generator indicate that sufficient additional energy can be used to increase overall efficiency of the thermodynamic cycle of a vehicle propulsion system.
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Lee, Jong-Nyun. "Design sensitivity analysis of multibody systems with special reference to four-wheel steering." Diss., The University of Arizona, 1992. http://hdl.handle.net/10150/185963.
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Sensitivity analysis methods are investigated for the optimal design of multibody systems. In order to overcome the shortcomings inherent in existing methods, a "mixed" method is developed. The beneficial features of the finite difference and the direct differentiation methods, and equations of motion in the joint coordinates are employed in this method. As a realistic application of the sensitivity analysis, a Four-Wheel-Steering vehicle with complete suspension systems and comprehensive analytical tire model is implemented. This model keeps full nonlinearity in the governing equations of motion for accuracy, and it is simulated using an existing general-purpose multibody dynamics simulation package. However, by using the transient dynamic analysis of the nonlinear model, optimal design parameters are dependent on driving scenarios. Therefore, the transient behavior of the system is represented by a series of steady state configurations. Hence, a steady state analysis procedure which finds a steady state configuration from an arbitrary initial condition is developed. By using the steady state analysis and the sensitivity analysis, the optimal steering ratios between the angles of the front and the rear wheels are obtained over various driving conditions. A steering control strategy is developed for the vehicle simulation to follow a prescribed path. Finally, the simulation results using the optimal steering ratio are compared against the results of the conventional two-wheel steering and the steering ratio based on the linear bicycle model.
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Wong, Hang Cheong. "Design and experimental evaluation of predictive engine air-ratio control using relevance vector machine." Thesis, University of Macau, 2009. http://umaclib3.umac.mo/record=b2182947.
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Petkar, Prasad. "Design and analysis of seat and restraint systems for crash simulation." Ohio : Ohio University, 2001. http://www.ohiolink.edu/etd/view.cgi?ohiou1174318691.
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Van, Vuuren Christiaan Michael. "Modelling of internal combustion engine intake and exhaust processes." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52343.
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Thesis (MScEng)--University of Stellenbosch, 2001.ENGLISH ABSTRACT: This thesis is concerned with unsteady, one-dimensional flow, which closely mimics those found in the manifolds of internal combustion engines. The physical equations describing problems of this nature are presented and some of the important concepts introduced. These equations and concepts were verified by comparison to published results. The Method of Characteristics (MaC) for unsteady one-dimensional flow with friction and heat transfer was used to analyse the gas flow through the inlet and exhaust systems of an engine. The theoretical derivation of unsteady gas dynamic boundary conditions is presented and the integration with the unsteady pipe flow explained. A simulation flow model was developed to analyse the flow by using the Mae. Thisflow model was then incorporated into an engine simulation program, ESA,to simulate internal combustion engines and to predict the performance of a specific engine. A cam-profile model and an in-cylinder thermodynamic model are used to complete the ESAsoftware. Experimental work was done on a modified Nissan Z24/NA20 engine to evaluate the simulation model. The manifolds of the Nissan Z24/NA20 were modified to isolate one of the cylinders for a proper single cylinder model. More experimental work was done on a Volkswagen 1.6£ 8-valve and a 1.6£ 20-valve engine to obtain performance data on two inlet manifolds developed using the ESAsoftware. Performance data and pressure traces in the inlet manifold of the Nissan Z24/NA20 were recorded for comparison with the ESA software. Good correspondence was found between tested and modelled data and the differences varied between ±5% on engine performance data and pressure wave frequency predictions, and ± 10% on pressure pulse amplitudes.
AFRIKAANSE OPSOMMING: Hierdie tesis handeloor bestendige, eendimensionele vloei, wat die gasvloei in spruitstukke van binnebrandenjins naboots. Die nodige vergelykings wat hierdie tipe probleme beskryf asook van die belangrikste konsepte, word bespreek. Hierdie vergelykings en konsepte is met behulp van gepubliseerde data geverifieer. Die Metode van Karakteristieke (MVK) vir bestendige, eendimensionle vloei met wrywing en warmte oordrag, is gebruik om die gasvloei deur inlaat en uitlaat sisteme van 'n enjin te analiseer. Die teoretiese afleiding van bestendige gasdinamiese randvoorwaardes asook hul integrasie met die bestendige pypvloei, word verduidelik. 'n Simulasie vloeimodel is ontwikkelom die vloei met behulp van die metode van karakteristieke te analiseer. Hierdie vloeimodel is deel van 'n omvattende enjinsimulasie program, ESA. Dit word gebruik om binnebrandenjins te simuleer en enjinwerkverrigting te voorspel. 'n Nokprofielmodel en 'n termodinamiese ontbrandingsmodel word gebruik om die enjinsimulasie program af te rond. Eksperimentele toetse op 'n gemodifiseerde Nissan Z24/NA20 enjin is gebruik om die simulasie model te evalueer. Die spruitstukke van die Nissan Z24/NA20 is aangepas om een van die silinders te isoleer om so 'n geskikte enkelsilindermodel te skep. Verdere eksperimentele toetse is gedoen op Volkswagen 1.6£8- klep en 1.6£ 20-klep enjins. Werkverrigtingsdata is verkry op twee nuwe inlaatspruitstukke wat met behulp van die ESAsagteware ontwerp is. Werkverrigtingsdata en drukverdelingsdata in die inlaatspruitstuk van die Nissan Z24/NA20is aangeteken om te vergelyk met die resultate van die ESAsagteware. Goeie ooreenstemming is verkry tussen toets- en gemoduleerde data. Die verskille varieer tussen ±5% op enjin werkverrigtingsdata en drukpulsfrekwensie voorspellings, en ± 10%op drukpuls-amplitudes.
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Brister, Kenneth Eugene. "Multi-objective design optimization using metamodelling techniques and a damage material model." Master's thesis, Mississippi State : Mississippi State University, 2007. http://library.msstate.edu/etd/show.asp?etd=etd-07032007-121410.
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Chen, Shr-Hung. "An intelligent environment for the occupant simulation and deformable dummy design." Ohio : Ohio University, 2003. http://www.ohiolink.edu/etd/view.cgi?ohiou1178132411.
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Vong, Chi Man. "Integrated machine learning techniques with application to adaptive decision support system for automotive engineering." Thesis, University of Macau, 2005. http://umaclib3.umac.mo/record=b1637079.
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Wu, Hao. "Analysis and Design of Vehicular Networks." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7639.
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Advances in computing and wireless communication technologies have increased interest in smart vehicles, vehicles equipped with significant computing, communication and sensing capabilities to provide services to travelers. Smart vehicles can be exploited to improve driving safety and comfort as well as optimize surface transportation systems. Wireless communications among vehicles and between vehicles and roadside infrastructures represent an important class of vehicle communications.
One can envision creating an integrated radio network leveraging various wireless technologies that work together in a seamless fashion. Based on cost-performance tradeoffs, different network configurations may be appropriate for different environments. An understanding of the properties of different vehicular network architectures is absolutely necessary before services can be successfully deployed. Based on this understanding, efficient data services (e.g., data dissemination services) can be designed to accommodate application requirements.
This thesis examines several research topics concerning both the evaluation and design of vehicular networks.
We explore the properties of vehicle-to-vehicle (v2v) communications. We study the spatial propagation of information along the road using v2v communications. Our analysis identifies the vehicle traffic characteristics that significantly affect information propagation. We also evaluate the feasibility of propagating information along a highway.
Several design alternatives exist to build infrastructure-based vehicular networks. Their characteristics have been evaluated in a realistic vehicular environment. Based on these evaluations, we have developed some insights into the design of future broadband vehicular networks capable of adapting to varying vehicle traffic conditions.
Based on the above analysis, opportunistic forwarding that exploit vehicle mobility to overcome vehicular network partitioning appears to be a viable approach for data dissemination using v2v communications for applications that can tolerate some data loss and delay. We introduce a methodology to design enhanced opportunistic forwarding algorithms. Practical algorithms derived from this methodology have exhibited different performance/overhead tradeoffs.
An in-depth understanding of wireless communication performance in a vehicular environment is necessary to provide the groundwork for realizing reliable mobile communication services. We have conducted an extensive set of field experiments to uncover the performance of short-range communications between vehicles and between vehicles and roadside stations in a specific highway scenario.
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Todorov, Vassil. "Automotive embedded software design using formal methods." Electronic Thesis or Diss., université Paris-Saclay, 2020. http://www.theses.fr/2020UPASG026.
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La part croissante des fonctions d'assistance à la conduite, leur criticité, ainsi que la perspective d'une certification de ces fonctions, rendent nécessaire leur vérification et leur validation avec un niveau d'exigence que le test seul ne peut assurer.Depuis quelques années déjà d’autres domaines comme l’aéronautique ou le ferroviaire sont soumis à des contextes équivalents. Pour répondre à certaines contraintes ils ont localement mis en place des méthodes formelles. Nous nous intéressons aux motivations et aux critères qui ont conduit à l’utilisation des méthodes formelles dans ces domaines afin de les transposer sur des scénarios automobiles et identifier le périmètre potentiel d'application.Dans cette thèse, nous présentons nos études de cas et proposons des méthodologies pour l'usage de méthodes formelles par des ingénieurs non-experts. Le model checking inductif pour un processus de développement utilisant des modèles, l'interprétation abstraite pour démontrer l'absence d'erreurs d'exécution du code et la preuve déductive pour des cas de fonctions critiques de librairie.Enfin, nous proposons de nouveaux algorithmes pour résoudre les problèmes identifiés lors de nos expérimentations. Il s'agit d'une part d'un générateur d'invariants et d'une méthode utilisant la sémantique des données pour traiter efficacement des propriétés comportant du temps long, et d'autre part d'un algorithme efficace pour mesurer la couverture du modèle par les propriétés en utilisant des techniques de mutationThe growing share of driver assistance functions, their criticality, as well as the prospect of certification of these functions, make their verification and validation necessary with a level of requirement that testing alone cannot ensure. For several years now, other industries such as aeronautics and railways have been subject to equivalent contexts. To respond to certain constraints, they have locally implemented formal methods. We are interested in the motivations and criteria that led to the use of formal methods in these industries in order to transpose them to automotive scenarios and identify the potential scope of application.In this thesis, we present our case studies and propose methodologies for the use of formal methods by non-expert engineers. Inductive model checking for a model-driven development process, abstract interpretation to demonstrate the absence of run-time errors in the code and deductive proof for critical library functions.Finally, we propose new algorithms to solve the problems identified during our experiments. These are, firstly, an invariant generator and a method using the semantics of data to process properties involving long-running timers in an efficient way, and secondly, an efficient algorithm to measure the coverage of the model by the properties using mutation techniques
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Gstalter, Étienne. "Réduction d’ordre de modèle de crash automobile pour l’optimisation masse / prestations." Thesis, Compiègne, 2020. http://www.theses.fr/2020COMP2576.
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Cette thèse est une contribution à un thème de recherche sur les applications de la réduction de modèle à l’ingénierie RENAULT. Elle fait suite aux travaux du projet IRT SystemX ROM (Réduction de modèles et Optimisation Multidisciplinaire) et aux thèses CIFRE RENAULT [Vuong], [Charrier]. L’application industrielle principale du thème est la mise au point de la structure d’un véhicule sollicité en crash; des travaux sont également en cours sur la combustion, l’acoustique et l’aérodynamique. Les travaux de cette thèse sont à la fois un apport à la méthode générique ReCUR et son adaptation à l’optimisation de la caisse d’un véhicule pour le crash. RENAULT utilise largement l’optimisation pour la mise au point de la caisse en crash, avec un outil d’optimisation numérique basé sur la méthode des plans d’expériences. Cette méthode nécessite beaucoup de calculs crash car cette simulation est considérée comme une boite noire, en utilisant uniquement les entrées et sorties. La méthode ReCUR prend le contre-pied en exploitant un maximum d’informations de chaque simulation crash, dans le but de réduire fortement leur nombre. Les travaux de cette thèse ont permis de remplir cet objectif pour les applications de mise au point au nominal et pour l’optimisation robuste dans des cas complexes comme le choc frontal et arrièreThis thesis is a part of a global research work dedicated to reduced-order modelling applications in the Renault engineering direction. It's research topic has been improved in the IRT System)('s project on Reduced Order Model and Multi-disciplinary Optimization. Some previous thesis can help understand the context. ([Vuong], [Charrier]). The main industrial application of the research theme is the focus on a body structure, in a crash loading. Some research works on acoustic, combustion and aerodynamic are currently ongoing. This thesis is both a contribution to the generic ReCUR method, and its application to a car body structure optimization for crash loadings. Engineering teams at Renault uses optimization to obtain the best crash simulation, with a numerical optimization software, based on designs of experiments. It requires a lot of crash simulation because each simulation is considered as unique, with only one response for each parameter. Only Inputs and Outputs are known. The ReCUR method consider that each simulation is a huge mine that needs our attention. We hope that we can decrease the number of crash simulation required to compute a model, by using much more data for each simulation
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Fatfouta, Naouress. "Towards a support system for simulation aided-design in the development phase of automotive industry." Electronic Thesis or Diss., université Paris-Saclay, 2020. http://www.theses.fr/2020UPASC025.
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Cette recherche vise à soutenir le processus de conception assistée par la simulation dans la phase de développement des véhicules. La phase de développement est soutenue par la modélisation et la simulation et consiste à affiner itérativement les spécifications de conception, à évaluer les performances du véhicule et à résoudre les problèmes de conception rencontrés. Nous sommes dans un contexte de conception assistée par la simulation puisque la décision concernant la conception du véhicule s’appuie principalement sur la simulation. Nous nous concentrons principalement sur le processus d'analyse de la simulation en crash. La conception assistée par la simulation est une activité à forte intensité de connaissances car elle dépend principalement des connaissances des analystes et des experts.Tout d'abord, nous identifions les difficultés et les défis rencontrés dans le processus de résolution des problèmes de conception. Nous menons une étude empirique pour mieux comprendre le processus de conception implémenté dans l'entreprise. Les défis industriels ont été identifiés sur la base d'une analyse à deux niveaux, celui de l'équipe d'analystes et celui du projet. Les défis comprennent l'accès et le partage des connaissances, la cohérence des données et la formalisation des approches et du processus. L'étude empirique confirme que la connaissance est un facteur clé pour l'amélioration du processus de conception assistée par la simulation.De plus, nous proposons une ontologie pour formaliser les connaissances cruciales pour la simulation en crash. Nous l’appelons ontologie de post-traitement de la simulation en crash. Cette ontologie formalise les connaissances relatives aux phases de post-traitement et d'interprétation des résultats de la simulation en crash automobile. L'objectif est de formaliser les connaissances relatives à la résolution des problèmes et à la proposition de modifications de conception du véhicule.Par ailleurs, la nature multidisciplinaire, hautement collaborative et contextuelle de la conception technique a soulevé le besoin de soutenir le développement de produits intégrés et collaboratifs. La réussite de la conception technique collaborative dépend de la capacité à gérer et à partager les connaissances techniques. Par conséquent, la gestion des connaissances joue un rôle crucial dans la compétitivité des entreprises, d'où notre proposition d'une approche, intégrée et collaborative, de la gestion des connaissances basée sur l'ontologie. Nous développons ainsi un système de management des connaissances basé sur l’ontologie, pour soutenir le processus de conception, en mettant l'accent sur l’extraction des connaissances. Nous proposons une architecture pour le système de soutien et une implémentation pour son évaluation. Nous avons démontré l’efficacité du système de soutien pour saisir les connaissances techniques, faciliter la résolution des problèmes de conception et faire gagner du temps aux analystesThis research aims to support the simulation-aided design process in the development phase of vehicles. The development phase is supported by modelling and simulation and consists of iteratively refining the design specifications, evaluating the vehicle's performance and solving design issues encountered. We are in a context of simulation-aided design since the decision about the vehicle design is mainly based on simulation. In this thesis research, our focus is mainly on the crash simulation analysis process. The simulation-aided design is knowledge-intensive; it depends heavily on the knowledge of analysts and experts.First, we identify the difficulties and challenges encountered in the design issue resolution process. Therefore, we conduct an empirical study to understand better the simulation-aided design process in use in the company. The industrial challenges have been identified based on a two-level analysis, the analysts' team level and the project level. The challenges include the access and share of knowledge, data consistency, and the formalisation of approaches and the process. The empirical study confirms that knowledge is a key factor for the improvement of the simulation-aided design process.Moreover, we propose an ontology to formalise crucial knowledge for car crash simulation. The ontology we have developed is called the Crash Simulation Post-Processing Ontology. This ontology formalises knowledge related to the post-processing phase of car crash simulation and the interpretation of simulation results. The aim is to formalise knowledge related to the resolution of design issues and the proposal of design changes.Furthermore, the multidisciplinary, highly collaborative and contextual nature of engineering design has raised the need to support integrated and collaborative product development. Successful collaborative engineering design depends on the ability to manage and share engineering knowledge. Therefore, nowadays, knowledge management plays a crucial role in business competitiveness, hence our proposal of an integrated and collaborative ontology-based approach to knowledge management. We develop an ontology-based knowledge management support system with a focus on knowledge retrieval. The architecture of the support system is proposed, and implementation for its evaluation is undertaken. The support-system proposed is proven effective for capturing engineering knowledge, facilitating design-issue resolution and saving analysts' time
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Edinger, Sarah T. (Sarah Tracy). "Mechanism design of a multi-motion automobile door." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/43134.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2008.Includes bibliographical references (p. 70).
This thesis describes the design and prototype construction of a multi-motion automobile door. This design is intended to provide a unique option for the opening of an automobile by enabling the door to open in two separate directions. A novel design of the door hinge will be presented in this paper which will allow the vehicle door to open in both the standard fashion by being hinged at the front of the vehicle, as well as backwards by being hinged at the rear of the vehicle. The direction in which the door opens can be chosen by the user. A small section of this paper will look at one additional multi-motion door concept. This second design is a split door in which half of the door opens in the standard fashion, while the second half opens up like a gull-wing door.
by Sarah T. Edinger.
S.M.
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Nishimoto, Keane T. (Keane Takeshi) 1981. "Design of an automobile turbocharger gas turbine engine." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/41810.
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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2003.Includes bibliographical references (leaf 24).
The turbocharger gas turbine engine was designed with the intent of being built as a demonstration for the Massachusetts Institute of Technology Department of Mechanical Engineering courses 2.005 and 2.006 to supplement material covered. A gas turbine operates on an open version of the Brayton cycle and consists of a compressor, a combustion chamber and a turbine. An automobile turbocharger was chosen because it contains a compressor and turbine on a common shaft. Designs for the combustion chamber, oil system, fuel system, and ignition system were created based on research of similar projects. Many of the necessary parts were also specified.
by Keane T. Nishimoto.
S.B.
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Rangarajan, Bharadwaj. "Robust concurrent design of automobile engine lubricated components." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/18897.
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Juan, Ching-Ju. "Rail service design and database management for new automobile distribution." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/38018.
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Durand, Keith (Keith V. ). "Design of an energy efficient and economical actuator for automobile windows." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/42298.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2007.Includes bibliographical references.
This thesis describes the design and analysis of an efficient, yet low cost, drum driven window actuation system for an automotive power window. The design uses a novel approach that involves using cables to both actuate and constrain the window. Test units were constructed and cycled well beyond the typical life expectancy of a window actuator, demonstrating that this technology is robust enough to be considered as a replacement for current mechanisms. Variations on the design that may produce either better longevity or higher efficiency are also presented, along with the tradeoffs that must be considered.
by Keith V. Durand.
S.M.
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Sheppard, Dean A. "The design of a lean automobile dismantling and recycling system." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9643.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and, (S.M.)--Massachusetts Institute of Technology, System Design and Management Program, 1998.Includes bibliographical references (leaf 69).
The purpose of this project was to design a new, more efficient automobile recycling system for the JMS consortium. JMS is a consortium of l 8 independent automobile recycling facilities processing a collective annual throughout of over 200,000 vehicles. 1 o begin the design process three JMS facilities were studied to establish the system requirements. Based on the requirements a new system was designed using the principles of lean production. Aspects of the system were tested at the same three locations to validate the design. Based on the test results, the lean system design presented herein is expected to increase effective daily throughput 25%, increase the peak throughput rate by 6:%, significantly reduce the handling therefore damage of each vehicle, and reduce the amount of land allocated to non-value adding buffers by 66%. Furthermore, the lean system is balanced and synchronized to the vehicle-arrival process, with increased volume flexibility. Currently, JMS anticipates implementing the design in all new facilities beginning with the Denver project this month. To address the question of what is the optimal throughput rate for JMS facilities, all known profit-influencing variables were parameterized and an analytical model of the profit was established. Using some simplifying assumptions, the profit-maximizing throughput was obtained. From this, three interesting and intuitive results were obtained ...
by Dean A. Sheppard.
S.M.
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Azpeitia, Camacho Marcia E. (Marcia Edna). "Common global architecture applied to automobile electrical distribution systems." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/59222.
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Thesis (S.M. in System Design and Management)--Massachusetts Institute of Technology, Engineering Systems Division, System Design and Management Program, 2010.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 111-112).
Electrical and electronic components have a prominent role in today's vehicles. Particularly during the last two decades, functionality has been added at an exponential rate, resulting in increased complexity, especially of the Electrical Distribution System (EDS), which is the backbone of the Electrical and Electronic System (EES). Increased content and complexity of electrical systems, together with pressure to reduce the design cycle time - to bring a larger variety of products to the market and at a faster pace - are forcing car companies to re-evaluate their existing electrical development processes. One of the ways that car makers have devised to accomplish this is a common EES architecture strategy, which consists in combining communization, standardization, reusability and best practices to create flexible EES architectural concepts that will be used in a higher number of derivative vehicles. This common architecture has several benefits, the most important being: reduction of development costs and time, which translates in less time for putting the products in the market; architecture, concepts and components reuse; rapid platform modifications, to adapt to market changes and regional preferences. The EES architecture choice for a vehicle is the result of the implementation of the desired functions in hardware and software. Many considerations need to be taken into account: costs, network capabilities, modularity, manufacturing, energy management, weight, among several others. The present work aims to explain these considerations, as well as the elements of the common EES, and in particular their impact on the EDS. Another important aspect for the successful implementation of the common architecture is the EDS development process. Despite the availability of a wide range of software tools, the current EDS approach is intensely manual, relying on design experts to define and maintain the interrelationships and complexities of the core design definition. There is a need to redefine the process, from concept to manufacture using a systems engineering approach, which would yield key benefits, like shorten development time, produce accurate harness manufacturing prints, reduce wiring costs by synchronizing all input and output data. An analysis of the tools and methods for design and validation of wire harnesses will be presented in the last two chapters of this thesis.
by Marcia E. Azpeitia Camacho.
S.M.in System Design and Management
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Tsai, Lauren (Lauren Elizabeth). "Design and performance of a gas-turbine engine from an automobile turbocharger." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/32971.
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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004.Includes bibliographical references (leaves 31-32).
The Massachusetts Institute of Technology Department of Mechanical Engineering teaches thermodynamics and fluid mechanics through a pair of classes, Thermal Fluids Engineering I & II. The purpose of this project was to design and fabricate a gas-turbine engine for demonstration use in these two classes. The engine was built from an automobile turbocharger with a combustion chamber connected between its compressor and turbine. Pressure and temperature sensors at different points of the engine cycle allow students to monitor the performance of the individual engine components and the complete engine cycle.
by Lauren Tsai.
S.B.
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Abou-Jaoude, Ramzi N. "Design and development of conformal automobile antennas using numerical modeling and experimental techniques /." The Ohio State University, 1997. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487943610785046.
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Padilla, Jorge 1983. "Design, fabrication, and performance of a gas-turbine engine from an automobile turbocharger." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32958.
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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005.Includes bibliographical references (leaf 50).
Thermal-Fluids Engineering is taught in two semesters in the Department of Mechanical Engineering at the Massachusetts Institute of Technology. To emphasize the course material, running experiments of thermodynamic plants are integrated into the course as demonstrations. The aim of this thesis is to supplement the course demonstrations of thermodynamic plants through the design and fabrication of a gas-turbine engine. The engine operates on an open version of the Brayton cycle. Students will be able to evaluate the energy conversion efficiency and net work ratio from air temperature measurements in three stages of the cycle. The gas-turbine engine is made from an automobile turbocharger for its common shaft turbine and compressor. A combustion chamber was placed between the outlet of the compressor and the inlet of the turbine. The temperature measurement system was designed from the placement of thermocouples on the outside wall of a pipe leading from the compressor to the combustor, on the outside wall of a pipe leading from the combustor to the turbine, and on the outside wall of the turbine exhaust pipe. As the temperature measured by the thermocouple will be that of the outside walls of the engine, the model will depict the cross-sectional temperature profile so the students will know the actual bulk temperature of the working fluid, air.
by Jorge Padilla, Jr.
S.B.
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Bouchard, Carole. "Modélisation du processus de design automobile. Méthode de veille stylistique pour le design du composant d'aspect." Phd thesis, Ecole nationale supérieure d'arts et métiers - ENSAM, 1997. http://tel.archives-ouvertes.fr/tel-00659687.
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Aujourd'hui, la plupart des entreprises occidentales se sont dotées d'un système de management par projets, caractérisant l'évolution d'une économie de masse à une économie de variété et de réactivité. Il s'ensuit chez les constructeurs une délégation de plus en plus importante aux équipementiers, des responsabilités liées à la conception des composants. Cette tendance nous a conduits aux 3 hypothèses suivantes : (1) l'équipementier doit acquérir la compétence design local dans les années à venir, (2) il doit donc se positionner rapidement en se préparant à participer au processus design à un stade conceptuel, (3) celà doit avoir lieu dans le souci de structurer l'activité design en cohérence avec celle des constructeurs. Le positionnement adequat s'appuie sur une formalisation des éléments informationnels et communicationnels mis en jeu dans le processus de design automobile. Pour répondre à cette problématique, nous avons modélisé le processus de style global qui s'insère dans le processus de conception automobile. Notre modèle s'appuie sur une approche cognitive de l'activité des stylistes. Il constitue une formalisation des composantes procédurale (démarche projet) et substantive qui renvoie à l'objet perçu par le consommateur, et plus précisémment à la notion de signe. Nous analysons l'articulation entre ces deux dimensions. Nous proposons ensuite des voies prescriptives en termes d'outils, permettant à l'équipementier de s'informer des nouvelles tendances en termes organisationnels (cadre d'une co-conception multiorganisations), informationnels (Systèmes d'Information et Nouvelles Technologies de l'Information, Travail Collectif Assisté par Ordinateur), et procéduraux (Numérisation du processus design, Outils de style Assisté par Ordinateur).
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Malek, Kamal Moussa. "Analytical and interpretive practices in design and new product development : evidence from the automobile industry." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/31097.
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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2001.Includes bibliographical references (p. 255-271).
Product design and development have been studied from both positivist and interpretivist paradigms. From the positivist perspective, design and product development are seen as technical transformation or production processes, which take customer requirements and existing technological possibilities as inputs and produce an objectively optimal product, one that is not influenced by the designer's preferences or biases. The result of this research is a focus on measuring the voice of the customer with "high fidelity", and on streamlining and optimizing this production process. From the intrepretivist perspective, product design and development are seen as relatively open-ended discursive processes, to which human participants from different backgrounds bring their unique worldviews and prejudices. Models of these processes are seen as metaphors intended to help people come to understanding by shedding light on and thus bridging the different worldviews, not as mathematical constructs to be optimized. In real life, empirical evidence shows that practitioners rely on a number of approaches that do not fit easily into one or the other of these paradigms. As a result, many analytical models and methodologies need to be modified to make them useful in real-world applications and, coniverscly, empirical research that accurately captures the richness and complexity of the design and development process fits uneasily in these traditional paradigms which researchers feel compelled to use. This dissertation addresses this shortcoming by developing a vocabulary for describing product design and development practices, which bridges the divide between the strictly positivist and strictly interpretivist views. The research approach used is one of theory building from case studies. The industry chosen for the case studies is the automobile industry. The thesis reports on three study sites. The first is an American manufacturer based in Detroit, known for its innovative product designs and its pioneering reliance on dedicated platform development teams. The second is the American design subsidiary of a Japanese manufacturer, one of the first to set up such a design operation in US. The third site is the Japanese design and development organization of the same manufacturer, based in a technical center outside of Tokyo. The theoretical framework presented in this dissertation, which co-evolved with the above case studies, takes the form of a taxonomy of product development practices. This taxonomy draws upon concepts from linguistics and the philosophy of language. In a first step, the distinction within linguistics between the structural sub fields (e.g., syntax and semantics) and the functional sub field of Pragmatics is used to sharpen the difference between analytical/structural practices on the one hand, and interpretive practices on the other. In a second step. two views of interpretation, one grounded in linguistics (Pragmatics. specifically). the other in the philosophical hermeneutics of Heidegger and Gadamer are used to expand the interpretive category into two, referred to as pragmatic interpretation and hermeneutic interpretation, respectively. Each of the three case studies provides a good illustration of a product development organization that relies predominantly on one of the types of practices and approaches captured by the taxonomy. The findings suggest a number of recommendations for design and product development managers and practitioners, as well as several directions for future research.
by Kamal M. Malek.
Ph.D.
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Joy, Tony. "A Robust QFT Control Approach for Automobile Engine Idle Speed Systems: Modeling, Design and Simulation." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1464794127.
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Oksuz, Sena. "A Comparative Study On Differences And Similarities In Color Determination Process And Criteria Of Leading Automobile Companies." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12604952/index.pdf.
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The present study was undertaken to indicate the differences and similarities in color determination process and color selection criteria of leading automobile manufacturers of the world. A comperative study was conducted in the light of relevant literature, interviews and questionnaires. A total number of 6 automobile company were selected for case studyFord, Honda, Hyundai, Volkswagen, Renault and Toyota. Total 19 respondents, the majority of whom were automobile designers and color specialists answered questions related with color design of automobiles and selection criteria. Later, a total of 18 representatives, including at least one Color and Trim designer, Product Engineer and Purchasing Manager from each company, completed the questionnaires. On the basis of findings, it can be said that each auto manufacturer has a particular color determination process. However, there are some similarities in color design process of Renault and Ford, Volkswagen and Toyota, Hyundai and Honda.
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Sikora, Celso Gustavo Stall. "Scheduling projects in operating systems: an application on assembly line balancing." Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/2859.
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Fundação Araucária; RENAULT; SetiA Pesquisa Operacional investiga as (melhores) formas de se configurar e coordenar sistemas ou operações usando técnicas de otimização. Geralmente, a otimização de um sistema é modelado com base no estado final almejado. Porém, como atingir ou implementar tal estado final em sistemas é pouco retratado na literatura. Esta dissertaçãode mestrado propõe uma nova classe de problema de otimização: a programação das operações entre o estado inicial e o final de um sistema, o Problema de Implementação. A programação das operações é especialmente importante para linhas de montagem. A indústria automobilística é fortemente baseada em linhas de produção que podem ser usadas até 24 horas por dia. Assim, as oportunidades de intervenções para mudar ou otimizar o sistema produtivo são poucas. As condições de implementação aplicadas ao balanceamento de linhas produtivas são discutidas, e as características observadas resultam no proposto Problema de Implementação de Linhas de Montagem (PILM). Na dissertação, um guia de modelagem baseado em Programação Linear Inteira Mista (PLIM) é desenvolvido para a formulação de diversas variações do Problema de Implementação. As instruções de modelagem são usadas para desenvolver um conjunto de modelos PLIM para o Problema de Implementação de Linhas de Montagem. Para a obtenção de resultados, um conjunto de instâncias é proposto. Assim, uma análise de sensibilidade em função de cada um dos parâmetros formadores das instâncias é realizada. As formulações são comparadas, junto com as diferentes formas de apresentar e resolver o problema. Ademais, um método de decomposição é usado para resolver um problema industrial real. A modelagem mostrase correta para a divisão da implementação de mudanças em linhas de montagem. Os resultados mostram que a divisão do esforço de implementação resulta em apenas poucas mudanças a mais (cerca de 7% para os casos pequenos e médios) comparadas com a implementação em uma fase. A possibilidade de programar a implementação em etapas menores aumenta a aplicabilidade de projetos, que, de outra forma, requeririam grande paradas de produção.
Operations Research investigates the (best) ways to configure and coordinate systems or operations with optimization procedures. Usually, the optimization of a system is modeled based on the aimed final configuration. However, little is published about how to reach or implement such optimal configurations in the systems. This master thesis proposes a new class of optimization problem: a scheduling of operations between initial and final states of a system, the Implementation Problem. The scheduling of operations is especially important to assembly lines. The automotive industry strongly relies on production lines that can operate 24 hours a day. Thus, the intervention opportunities to change or optimize the production system are very few. The implementation conditions of balancing on assembly lines are discussed, and the observed characteristics result in the proposal of the Assembly Line Implementation Problem (ALIP). The master thesis proposes a Mixed-Integer Linear Programming (MILP) modeling guide for the formulation of several variations of Implementation Problems. The modeling instructions are used to develop a set of MILP models for the Assembly Line Implementation Problem. For the results, a dataset is proposed and a sensitivity analysis on each of the consistent parameters of the dataset is performed. The proposed formulations are compared, along with the different forms of presenting and solving the problem. Furthermore, a decomposition method is used to solve a real-world industrial problem. The modeling correctly represents the division of the implementation of changes in assembly lines. The results show that the division of the effort in multiple stages only need a few more changes (around 7\% for the small and medium cases) comparing to a straightforward implementation. The possibility of scheduling the implementation in smaller steps increases the applicability of projects that otherwise would require a large system's stoppage time.
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Sequeira, Michele W. (Michele Wanda). "Use of the design structure matrix in the improvement of an automobile development process." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/13484.
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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, and Massachusetts Institute of Technology, Sloan School of Management, 1991.Includes bibliographical references (leaves 67-68)
by Michele W. Sequeira.
M.S.
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Mankila, J. (Janne). "Acceptance of personalisable automobile user interface — and how the technology fits in the contemporary design movements:emphasis on emotions." Master's thesis, University of Oulu, 2013. http://urn.fi/URN:NBN:fi:oulu-201304241194.
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The interface used in the car cabin keeps expanding and growing in versatility. The number of features and devices in this interface, which has usually consisted of the wheel and pedals as well as secondary functions such as radio, navigator, and telecommunications controls, is rising despite the notion that the human capability of learning and utilising these features is not increasing at the same rate. Partly due to this trend, the structure of the car interface is changing. As the space on the dashboard is restricted, these features are often fitted in centralised interfaces, usually operated via a touch screens or rotating multidirectional knobs. These graphics- and menu-based interfaces can, however, disrupt the driving routine and hamper the driver’s concentration on safe driving and traffic conditions. Added to the increasing number of traffic users, we have got a problem. How do we make sure that people with varying cognitive skills and abilities can fully utilise the diversifying interfaces without sacrificing traffic safety? One of the possible answers is personalisable car interfaces, where people can modify and design the interfaces to match their needs and wants. The main goal for the thesis is to find out how open people are to this sort of interfaces in an environment as familiar as the car cockpit. The study was conducted by creating a questionnaire and surveying three different groups, student groups from Luleå University of Technology and Oulu University, as well as a group of chemical factory employees. Three concepts were showcased in the questionnaire, with the aim of illustrating some of the potential new features and control capabilities. The questions were partly adapted from and the analysis carried out using the Technology Acceptance Model 3 (i.e. TAM3). The secondary goal of the study is to explain and argue why personalisable car interface is a valid design evolution. Perspectives to design trends will be proposed by examining the movements of industrial design in the past century as well as future predictions. Human emotions and pleasures are focused on throughout the study, since they have a significant effect on people’s acceptance of new things, or, particularly in this study, new technologies. Related to these emotions, a viewpoint of ecological sustainability is brought up in the theory section, where the connection of customisable car interfaces and perceived longevity of the car as well as their effects on consumption behaviour will be discussed. The result to the main question of the study is that the case test groups were found to “cautiously accept” the personalisable car interface. On a scale from one to six, where the average is thus 3.5, the willingness to adopt the personalisable car interface received the average value of 4.12. No major differences between the groups were found in this regard, and no correlations between the acceptance and the gender, age, nor driving experience were found. The second of the main questions asked which factors in the TAM3 were the most important predictors for the acceptance of personalisable car interface. The factor of ‘product attachment’ was created and added to the existing TAM3, with the aim of addressing potential emotional factors. Surprisingly, among all of the respondents, the results showed that ‘product attachment’ was clearly the most important factor in determining the acceptance of the personalisable car interface. It was nearly twice as important as the next most important predictors, ‘perceived ease of use’ and ‘subjective norm’. The results suggest that emotional aspects and factors inspiring attachment greatly affect the perception of a car interface and its accessibility. Between the three groups, major differences were found in which of the determinants predicted the acceptance and how heavily. As round 88% of the respondents were of age 30 or less, the results can best be generalised to young adults. It is also to be expected that the results would have been different had the study been made elsewhere in the world, it is safest to generalise the results mainly to economically relatively well-to-do young adults, who already have experience in driving a carHenkilöautojen käyttöliittymä laajenee ja monipuolistuu. Tämän ratin ja polkimien lisäksi vähemmän välttämättömien kontrollien, kuten kommunikaatiovälineiden, radion ja navigaattorin muodostaman kokonaisuuden uusien ominaisuuksien ja laitteiden määrä kasvaa jatkuvasti, vaikka ihmisen kyky oppia ja turvallisesti hyödyntää niitä jokapäiväisessä ajossa ei kehity samaa tahtia. Osittain tästä johtuen auton käyttöliittymän perusrakenne on muuttumassa. Koska kojetaulun tila on rajallinen, nämä ominaisuudet mahdutetaan usein keskitettyihin käyttöjärjestelmiin, joita operoidaan yleisimmin kosketusnäytöltä tai pyöriteltävillä ja monipuolisesti liikuteltavilla ohjausnupeilla. Nämä grafiikkaan ja valikoihin perustuvat käyttöjärjestelmät saattavat kuitenkin häiritä kuljettajan keskittymistä turvalliseen ajotapaan ja ympäröivään liikenteeseen. Yhdistettynä jatkuvasti kasvavaan autoilijoiden määrään liikenteessä, ongelma on valmis. Miten varmistaa, että kognitiivisilta kyvyiltään erilaiset ihmiset voivat täysipainoisesti käyttää monipuolistuvia käyttöliittymiä ilman, että liikenneturvallisuus vaarantuu? Yksi mahdollisista vastauksista on personalisoitavat käyttöliittymät, joissa kukin käyttäjä muokkaa itselleen omiin tarpeisiinsa ja mieltymyksiinsä soveltuvan käyttöliittymän. Tämän kirjoitelman päätarkoitus on selvittää, kuinka avoimia ihmiset ovat vastaanottamaan tällaisia käyttöliittymiä niinkin tutussa ympäristössä kuin auton ohjaamossa. Tutkimus suoritettiin kyselylomakkeella ja vastaajina oli kolme erilaista ryhmää, opiskelijaryhmät Luulajan teknillisestä yliopistosta ja Oulun yliopistosta sekä ryhmä kemian alan tehtaiden työntekijöitä. Kyselylomakkeessa esitettiin kolme erilaista konseptia personalisoitaville auton käyttöliittymille, joiden avulla vastaajille havainnollistettiin mahdollisia kontrolleja ja uusia ominaisuuksia. Lomakkeen kysymykset laadittiin osaksi ja analyysi suoritettiin Technology Acceptance Model 3 -mallin (l. TAM3) pohjalta. Toinen päätarkoitus kirjoitelmalla on perustella, miksi personalisoitavat käyttöliittymät ovat pätevä kehityssuunta auton ohjaamossa. Teoriaosuudessa esitetään perspektiivejä suunnittelun trendeihin tarkastelemalla teollisen suunnittelun pääsuuntia viimeisen vuosisadan aikana ja tulevaisuuden ennusteissa. Niin teoriaosuudessa kuin kyselytutkimuksessa ja sen analyyseissäkin on keskitytty ihmisten kokemiin tunteisiin ja mielihyvään, sillä ne vaikuttavat suuresti uusien asioiden, tässä tapauksessa uuden teknologian, hyväksymiseen. Tähän liittyen on teoriaosuudessa myös tuotu esiin ekologisen kestävyyden näkökulma, sillä auton käyttöliittymän muokattavuudella on suuri potentiaalinen vaikutus käsitykseen auton arvosta ajan suhteen ja tätä kautta auton kestävyyteen ja autoilijoiden ostokäyttäytymiseen. Tutkimuksen päätulos on, että tutkimusryhmien henkilöt suhtautuvat ajatukseen personalisoitavasta auton käyttöliittymästä varovaisen myönteisesti. Asteikolla yhdestä kuuteen, jossa keskiarvo on näin ollen 3,5, halukkuus omaksua personalisoitava auton käyttöliittymä sai keskiarvon 4,12. Suurta eroa vastauksissa ryhmien välillä ei havaittu, eikä esimerkiksi vastaajien sukupuolella, iällä tai ajokokemuksella ollut merkittävää yhteyttä tulokseen. Toinen pääkysymyksistä yritti selvittää, mitkä tuoteominaisuudet tai vaikuttimet olivat tärkeimpiä personalisoitavien käyttöjärjestelmien hyväksymisen kannalta. ’Kiintymyksestä tuotteeseen’ tehtiin oma vaikuttimensa TAM3-malliin, jotta mahdolliset emotionaaliset vaikuttimet voitaisiin selvittää. Yllättävästi tuloksista havaittiin, että se oli kaikki vastaukset huomioiden vaikuttimista selkeästi tärkein. ’Kiintymys tuotteeseen’ oli lähes kaksi kertaa tärkeämpi kuin seuraavaksi tärkeimmät vaikuttimet, ’vaikutelma käytön helppoudesta’ ja ’subjektiivinen normi’. Tulos osoitti, että tunnepohjaiset ja kiintymykseen kannustavat tekijät vaikuttavat suuresti mielikuvaan auton käyttöliittymästä ja sen lähestyttävyydestä. Siinä, mitkä vaikuttimet olivat tärkeimpiä halukkuudelle omaksua personalisoitava käyttöliittymä, oli suuria eroja eri ryhmien välillä. Koska noin 88 % kyselyyn vastanneista oli 30-vuotiaita tai alle, voi tuloksia parhaiten yleistää nuoriin aikuisiin. Koska on jokseenkin odotettavaa, että muualla maailmassa vastaukset voisivat poiketa nyt saaduista, on turvallisinta yleistää tutkimuksen tuloksia lähinnä taloudellisesti suhteellisen hyvin menestyviin nuoriin aikuisiin, joilla on jo kokemusta autolla ajamisesta
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Kalakota, Govardhan Reddy. "Hierarchical Partition Based Design Approach for Security of CAN Bus Based Automobile Embedded System." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535382487070314.
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Kaltcheva, Rossitza. "De l’isolement professionnel à la restauration de la fonction psychologique du collectif : la santé au travail, entre soliloque et pensée dialogique : le cas de l’intervention à l’ingénierie Renault." Thesis, Paris, CNAM, 2019. http://www.theses.fr/2019CNAM1279.
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Cette thèse trouve sa genèse dans une intervention en psychologie du travail, réalisée au sein de l’entreprise Renault, sous les modalités de la clinique de l’activité. L’intervention s’est articulée autour de deux volets : montage en usine et conception industrielle. La thèse porte sur le second terrain, conduit au Technocentre Renault. Le dispositif dialogique déployé a permis de faire reculer l’isolement professionnel en développant la fonction psychologique du collectif. La thèse soutient la possibilité de rendre compte de ce développement. Les analyses caractérisent des situations d’isolement réalisant des discours désertés par autrui ainsi que des dialogues, habités par autrui, signe d’un développement de la fonction psychologique du collectif. Les analyses interrogent les conditions d’installation d’un dispositif dialogique pérenne à l’ingénierie Renault. La conclusion met en exergue la fonction vitale du dialogue professionnel pour l’efficacité et la santé au travailThis doctoral thesis originated in an activity clinic intervention in work psychology conducted at the Renault company in France. The intervention covered two activities: assembly line activities and industrial design. The thesis concerns the second activity conducted at the Renault Technocentre. The dialogical process deployed made it possible to reduce isolation at work by developing the psychological function of the group. The assumption put forward is that it is possible to demonstrate this development. The analyses characterise the situations of isolation producing utterances devoid of the existence of others as well as dialogues inhabited by others, a sign of the development of the psychological function of the group. The analyses raise questions concerning the establishment of a lasting dialogical process in the Renault engineering department. Theconclusion highlights the vital role of professional dialogue for efficiency and health at work
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Šimkus, Darius. "Lengvojo automobilio kėbulo elementų stiprumo charakteristikų tyrimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100622_150402-33694.
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Baigiamajame magistro darbe tiriamos lengvojo automobilio kėbulo elementų stiprumo charakteristikos. Išanalizuoti literatūros šaltiniai, automobilių kėbulų konstrukcijos, dinaminis modeliavimas, kompiuterinė technika, naudojama saugumo elementų tobulinimui. Sija, daugiausiai kinetinės energijos sugeriantis automobilio elementas, projektuota priekinio susidūrimo atvejui. Atlikus teorinius skaičiavimus, rezultatai palyginti su modeliavimo. Pateikta išsami išilginės priekinės sijos tobulinimo metodika, modeliavimo rezultatų analizė ir apibendrinimas. Sumodeliavus priekinę išilginę siją, jos geometrinius parametrus, pateikiamos baigiamojo darbo išvados, literatūros šaltiniai. Darbą sudaro 9 dalys: įvadas, mokslinės literatūros apžvalga, automobilių kėbulų konstrukciniai ypatumai saugumui užtikrinti, dinaminiai automobilio modeliavimo bandymai, kompiuterinė technika, naudojama tobulinant saugumo komponentus, priekinės išilginės sijos konstrukcijos modeliavimas, taikant skaitinį metodą, išvados ir pasiūlymai, literatūros sąrašas, priedai.The stiffness behaviour of the passenger vehicle body elements is investigated in the Master thesis. The analyzed literature, automotive body design, dynamic simulations, computer equipment used for safety development is investigated too. This beam absorbs majority of kinetic energy, it is designed for the frontal impact. Theoretical calculations are compared with simulation results. The deep development methodology of the beam are described, the analysis of the simulation results and discussion are described also. The thesis conclusion, literature is presented after the simulation of the front longitudinal beam geometrical specifications. The thesis is divided to 9 sections: an introduction, review of a scientific literature, automotive body design safety features, dynamic simulation tests of a vehicle, a computer equipment, used for the development of safety components, design simulation of the front longitudinal beam by numerical method, conclusion and suggestions, literature, appendix.
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Lopes, Thiago Cantos. "Balancing optimization of robotic welding lines: model and case study." Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/2621.
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FA; UTFPR; RENAULTLinhas robóticas de solda são comuns na indústria automobilística. Durante a produção de um veículo, sua estrutura metálica precisa ser soldada em um único corpo resistente. Isso é feito por meio de centenas de soldas a ponto por resistência, cada uma liga localmente duas ou mais placas metálicas. Distribuir eficientemente esses pontos entre robôs é particularmente desafiador, levando em conta que: cada robôs podem fazer acessar uma parte dos pontos de solda, há tempo de movimentação entre pontos e robôs podem colidir entre si se ocuparem o mesmo espaço físico ao mesmo tempo. Há muitas maneiras factíveis de distribuir pontos de solda. No entanto, cada uma gera um resultado econômico diferente: Se um robô soldar muitos pontos se tornará um gargalo e reduzirá a taxa média de produção.Obter o conjunto de decisões operacionais que gera o melhor desempenho é o objetivo de técnicas de otimização. Há uma ampla variedade de técnicas descritas na literatura de pesquisa operacional e ciência da computação: modelos matemáticos, algoritmos, heurísticas, meta-heurísticas, etc. No contexto industrial, tais técnicas foram adaptadas para diversas variantes de problemas práticos. No entanto, estas adaptações só podem resolver as variantes para as quais foram idealizadas. Se por um lado podem se traçar paralelos entre vários aspectos de linhas robóticas de solda e tais variantes, por outro o conjunto completo de características das linhas estudadas não é tratável por (ou convertível em) nenhuma delas. A presente dissertação desenvolve uma abordagem para otimizar tais linhas, baseada em um modelo de programação linear inteira mista desenvolvido para descrever o problema. Ela também apresenta um estudo de caso para discutir e ilustrar possíveis dificuldades de aplicação e como superá-las. O modelo apresentado foi aplicado a dados de uma linha robótica de solda da fábrica, composta por quarenta e dois robôs, quatro modelos de veículos e mais de setecentos pontos de solda por veículo. A média ponderada da redução em tempo de ciclo obtida pelo modelo foi de 17.5%. Variantes do modelo, concebidas para auxiliar trabalhos futuros, são apresentadas e discutidas.
Robotic welding manufacturing lines are production lines common in automobile industries. During a vehicle's production, the vehicle's metal structure must be welded in a single resistant body. This is made by hundreds of spot-welding points, each of which tie locally two or more metal plates. Efficiently distributing these welding points amongst robots is particularly challenging, taking in account that: not all robots can perform all weld points, robots must move their welding tools between weld points, and robots might interfere with one another if they use the same geometrical space. There are multiple feasible manners to distribute the welding points. However, each of these forms generates different economical results: If a robot performs too many points, it will become a line bottleneck and reduce average throughput. To find the set of operational decisions that yields the best output is the goal of optimization techniques. There are a wide variety of such techniques described in operations research and computer sciences literature: mathematical models, algorithms, heuristics, meta-heuristics, etc. In the industrial context, these techniques were adapted to related line balancing problems. However, these adaptations can only solve the specific variants they were designed to address. While parallels can be drawn between aspects of robotic welding lines and many of such variants, the full combined set of characteristics of the studied lines is not treatable by (or convertible to) any of them. This dissertation develops a framework to optimize such lines, based on mixed-integer linear programing model developed to describe the problem. It also presents a case study to discuss and illustrate possible difficulties and how to overcome them. The presented model was applied to data from the factory's robotic welding lines composed of forty-two robots (divided in thirteen stations), four vehicle models and over seven hundred welding points for each vehicle. The weighted average reduction percentage in cycle time obtained by the model was 17.5%. Model variants, designed to aid further works are presented and discussed.
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Štipák, Patrik. "Vývoj zavěšení kol vozu Formule Student." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231940.
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Tato diplomová práce je věnována vývoji a analýze zavěšení Formule Student. V úvodu je představena mezinárodní soutěž Formula Student, její disciplíny a historie týmu TU Brno Racing a UH Racing. V teoretické části je detailní popis charakteristik pneumatiky, kinematický návrh zavěšení a aerodynamiky s ohledem na závodní vozy. V části věnované konstrukčnímu návrh je popis vývoje ramen zavěšení, vahadel a zadního stabilizátoru. Návrh kinematických charakteristik vozu Dragon 5 je detailně popsán a porovnán s předešlou variantou. Mimo vývoje kinematiky Dragon 5 je popsán vývoj vozu UH 18. Závěrečná kapitola detailně analyzuje zaznamenaná data z testování vozu Dragon 4.
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Deniel, Jonathan. "Conscience du risque et automatisation de la conduite : de l’analyse des processus cognitifs en situation de changement de voie à la conception centrée sur l’humain d'un système d'automatisation human-like." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0445.
Full textAbstract:
La conduite automobile est une activité aussi complexe que répandue, parmi les manœuvres les plus courantes exécutées par les conducteurs nous trouvons le changement de voie (gls{CDV}) avec insertion entre des véhicules du trafic. Les progrès technologiques récents ouvrent la voie à une automatisation progressive des diverses composantes de l'activité de conduite dont, entre autre, le changement de voie.Nos objectifs dans ce travail de thèse en ingénierie cognitique étaient triples, (1) mieux comprendre et modéliser les processus cognitifs du conducteur à l'œuvre lors de la prise de décision et l'exécution d'un gls{CDV} en conduite manuelle (en particulier concernant l'évaluation subjective du risque) en vue d'alimenter le développement du modèle gls{COSMODRIVE} (cite{bellet2003}). (2) Concevoir et évaluer un automate textit{Human-like} capable d'exécuter un gls{CDV} à la manière d'un conducteur humain. Ce deuxième objectif permettant également de traiter de questionnements concernant l'acceptation de ce type d'automate. (3) Étudier les éventuels effets induits par l'utilisation de cette fonctionnalité d'automatisation du gls{CDV}, sur les décisions et jugements subjectifs lors de situations de gls{CDV} en conduite manuelle ultérieures.Pour atteindre ces objectifs, nous avons mis en place un protocole de recherche, sur la plate-forme de simulation V-HCD, divisé trois volets expérimentaux imbriqués et impliquant les mêmes participants pour chacun d'entre eux. Dans le cadre de ce protocole, les participants ont été invités dans un premier temps, à prendre des décisions de gls{CDV} et à évaluer le risque situationnel ainsi que l'acceptabilité d'un système d'automatisation de la manœuvre en conduite manuelle. Dans un second temps, à utiliser et évaluer un automate textit{Human-like} de la manœuvre de gls{CDV} et enfin dans un troisième temps, à conduire de nouveau manuellement et à prendre des décisions de gls{CDV} pour des situations de conduites spécialement paramétrées pour s'approcher de leur seuil de décision (estimé à partir d'une analyse en direct de leurs décisions lors de la première phase de conduite manuelle).Les résultats obtenus nous on permis d'identifier une stratégie d'insertion dans un espace du trafic lors du gls{CDV} permettant, sur la base de la théorie des zones enveloppes, d'expliquer la structuration des décisions d'exécution de la manœuvre. Concernant l'automate textit{Human-like} du gls{CDV} nous avons constaté une acceptation meilleure que prévue par les participants, y compris de la part des plus réfractaires au véhicule autonome. Nous avons aussi montré une diminution de l'estimation du risque de la situation et de la manœuvre lorsque celle-ci était exécutée par l'automate. Nous avons également, validé la dimension textit{Human-like} de la trajectoire de gls{CDV} de l'automate. Enfin, nous avons pu mettre en évidence la manifestation d'un effet induit par l'utilisation de l'automate lors de situations de gls{CDV} en conduite manuelle se traduisant par une diminution du seuil de décision et de l'évaluation du risque de la manœuvre pour ce seuil uniquement.Ces résultats tendent à montrer que la démarche de conception centrée sur l'humain de système d'automatisation de la conduite est prometteuse en terme d'acceptation de la technologie tout en présentant quelques effets induits potentiels à propos lesquels il faudra rester vigilantDriving activity is both widespread and very complex. Among the most frequently executed manœuvres we identified the lane change (LC) with insertion between traffic vehicles. Current improvements in the field of driving automation are progressively paving the way for the gradual automation of the various components of the driving activity, including, among other things, lane changes.Our purposes in this thesis work in cognitive engineering were (1) to better understanding and contribution to the modeling of the driver's cognitive processes at work when making decisions and performing LC in manual driving (especially regarding the subjective risk assessment), in order to feed the development of the gls{COSMODRIVE} model (cites{bellet2003}). (2) Design and evaluate a textit{Human-like} automation capable of executing a LC as a human driver. This second objective also makes it possible to address questions about the acceptance of the behaviour of this type of automations. (3) Study the possible effects induced by the use of this LC automation, on decisions and judgments regarding lane change situations in subsequent manual driving situations.To achieve these objectives, we set up a research protocol (on the V-HCD driving simulation platform) divided into three intertwined experimental phases and involving the same participants for each of them. Participants were first invited to make decisions on LC and to assess the situational risk and acceptability of a hypothetical automated LC system. Then, in the second phase, they were invited to use and evaluate textit{Human-like} LC automation we designed for this experiment. Finally, in the last phase, participants were instructed to drive again manually and to make LC decisions in driving situations that were specially configured to approach their decision threshold (estimated from a direct analysis of their decisions during the first manual driving phase).The results obtained led us to identify a traffic merging strategy within the LC manœuvre allowing us, on the basis of the envelope zones theory, to explain the structure of the LC decisions. Concerning the human-like LC automation we found a better acceptance of the system by the participants than expected, even from the most reluctants to the autonomous vehicle. We also showed a decrease in the risk estimation of the situation and the manoeuvre when it was performed by the automation. We additionnaly validated the textit{Human-like} aspect of our automation's LC trajectory. Finally, we were able to highlight the occurence of an effect induced by the use of the automation during later manual driving LC situations. This induced effect was resulting in a lowering of the decision threshold as well as the risk assessment of the LC manoeuvre to be executed. These results suggest that the human-centred design approach to driving automation systems design is promising in terms of technology acceptance and adoption. However they may present some potential induced "side" effects that will require deeper investigation