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Dissertations / Theses on the topic 'Aircraft Industries'
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1
Juráková, Hana. "Marketingový plán pro letoun L410 NG společnosti Aircraft Industries, a.s." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2014. http://www.nusl.cz/ntk/nusl-224318.
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This master´s thesis deals with compiling a marketing plan for L 410 NG aircraft, manufactured by Aircraft Industries a.s.. The first part includes general theoretical knowledge, focusing on the process of formulating a plan by analyzing the external environment SLEPTE , Porter's five forces model, SWOT analysis and marketing mix 5P. In the second analytical part, the fundamental theory is applied to the company. On the basis of the results achieved, the individuals steps of a new marketing plan, including costs and time schedule are formulated in the final part of the thesis.
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Maturkanič, Michal. "Analýza business modelu spoločnosti Aircraft Industries, a.s. a návrhy na jeho zlepšenie." Master's thesis, Vysoká škola ekonomická v Praze, 2017. http://www.nusl.cz/ntk/nusl-359061.
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The graduation theses applies itself to business model analysis of the company Aircraft Industries, a.s. which run a business in production and sales of small civil aircrafts L-410. The company is struggling with period full of uncertainty which caused the fall of sales, fabrication restriction as well as loss in trading incomes. Unfortunately, according to some analysis performed in the diploma work, the current problems have not been caused just by contemporary events, though by long-term inappropriate set of processes in the firm, too. After all, the work shows possible development in the near future, its impact on the company, as well as suggestions which should be received and accepted by management to avoid any further negative impacts on the company.
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Lampel, Joseph. "Strategy in thin industries : essays in the social organization of industry." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74589.
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This dissertation is a study of strategy in thin industries, a class of industries whose members include the aircraft industry, jet engines, heavy electrical equipment, and diesel locomotives. These industries have a number of common features which inter-relate to produce a unique configuration. Foremost among the attributes that make up this configuration is the sparsity and magnitude of transactions on which the industry must subsist. The decrease in the number of transactions, and the increase in their size, results in a "thin" industry. The sparsity and size of transactions combine to produce complex, unstable, and highly interconnected environments. These environmental conditions motivate firms to develop external linkages with other organizations. The successful management of external linkages will frequently depend on knowledge and experience obtained in previous relationships. Many of the problems created by external linkages can only be resolved once they are formed. At the same time, the knowledge required to resolve these problems calls for previous experience.The dissertation is divided into two parts. In the first three chapters we explore thin industries as a type and as an environment. In the remaining three chapters we look at the ramifications of interorganizational learning on the management of external linkages. In the concluding chapter we discuss the implications of thin industries to the study and practice of strategic management. Three issues in particular are singled out: the decline of organizational autonomy, the limits of competition, and new directions for theory building. (Abstract shortened by UMI.)
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Edgerton, D. E. H. "State intervention in British manufacturing industry, 1931-1951 : a comparative study of policy for the military aircraft and cotton textile industries." Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/7646.
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Gargiulo, Flavio Riva. "Indústria de construção aeronáutica, o caso da EMBRAER: história e avaliação." Fundação Getulio Vargas, 2008. https://web.bndes.gov.br/bib/jspui/handle/1408/10294.
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A indústria de construção aeronáutica se caracteriza pelo elevado montante de recursos movimentados, pela utilização de tecnologias avançadas e trabalho qualificado, bem como pela sua forte vocação exportadora. O atendimento à rígidos padrões de confiabilidade do produto e a exigência de atendimento pós venda em nível mundial associadas às demais características mencionadas estabelecem barreiras significativas à entrada de novos concorrentes. Esses fatores vêm sendo utilizados como fundamentação para a defesa de políticas governamentais de incentivos, gerando diversas contendas internacionais ao longo das últimas décadas. O mercado de construção de aeronaves comerciais é dominado por quatro empresas: BOEING, AIRBUS, EMBRAER E BOMBARDIER. Criada em 1969 como sociedade de economia mista, a EMBRAER é um dos únicos casos (no setor) de entrante com sucesso, ao longo das últimas décadas. Após uma fase inicial, impulsionada, entre outros, por encomendas governamentais, a empresa acumulou capacitação técnica, de organização da fabricação e gerencial, tornando-se um competidor importante nessa indústria. Após obter sucesso com vários produtos, a EMBRAER passou a enfrentar dificuldades crescentes, decorrentes não somente da queda de demanda, como também de sucessivos prejuízos causados por projetos equivocados. A empresa, privatizada em 1994, ajustou sua estrutura, expandiu sua base comercial e industrial, passando a atuar em mais de 60 países. A indústria de construção aeronáutica, com foco no mercado de aviação civil e o desempenho da EMBRAER, antes e após a privatização, ocorrida em 1994, são o objeto deste trabalho.The aircraft manufacturing industry is characterized by the high amount of resources involved in the activity, the use of advanced technologies, skilled work, and for its strong export vocation. In addition to these characteristics, the attention to rigid standards of reliability and the need of post-venda attendance worldwide provide significant barriers to entry for new competitors. These aspects have been used by governmental authorities to justify incentive policies and subsidies, resulting in several international commercial disputes over recent decades. The market is dominated by four companies: BOEING, AIRBUS, EMBRAER and BOMBARDIER. Created in 1969 as public-private company, EMBRAER is one of the few cases (in the industry) of successful new competitor, over the last few decades. After an initial period of relevant governmental orders, the company acquired technical knowledge, good manufacturing organization and business management, becoming a major competitor in the industry. Although obtaining success with several products, EMBRAER faced growing difficulties, related not only to a weak demand period, but also from successive losses caused unsuccessful projects. Privatized in 1994, the company has adjusted its structure, expanded its commercial and industrial base, operating nowadays in over than 60 countries. The aircraft manufacturing industry focusing on the market of civil aircraft sector and the performance of EMBRAER, before and after privatization occurred in 1994, are the object of this work.
Dissertação (mestrado) - Fundação Getulio Vargas, Escola de Pós-Graduação em Economia, Mestrado em Finanças e Economia Empresarial, Rio de Janeiro, 2008.
Bibliografia: p. 106
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Pinkney, Kathryn Currie. "From Stockyards to Defense Plants, the Transformation of a City: Fort Worth, Texas, and World War II." Thesis, University of North Texas, 2003. https://digital.library.unt.edu/ark:/67531/metadc4359/.
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World War II represented a watershed event in the history of the United States and affected political, economic, and social systems at all levels. In particular, the war unleashed forces that caused rapid industrialization, immigration, and urbanization in two regions, the South and the West. This study examines one community's place in that experience as those forces forever altered the city of Fort Worth, Texas. Prior to World War II, Fort Worth's economy revolved around cattle, food-processing, and oil, industries that depended largely on an unskilled labor force. The Fort Worth Stockyards laid claim to the single largest workforce in the city, while manufacturing lagged far behind. After an aggressive campaign waged by city civic and business leaders, Fort Worth acquired a Consolidated Aircraft Corporation assembly plant in early 1941. The presence of that facility initiated an economic transformation that resulted in a major shift away from agriculture and toward manufacturing, particularly the aviation industry. The Consolidated plant sparked industrial development, triggered an influx of newcomers, trained a skilled workforce, and stimulated an economic recovery that lifted the city out of the Depression-era doldrums. When hostilities ended and the United States entered the Cold War period, Consolidated and the adjacent airfield, designated as Carswell Air Force Base in 1948, provided the framework for Fort Worth's postwar industrial expansion and economic prosperity. Fort Worth emerged from World War II as one of the nation's premier aviation production centers and as a linchpin of America's defensive strategy. In the process, it became what historian Roger Lotchin has labeled a "martial metropolis." Ties developed during the war between the city and the military extended into the postwar period and beyond as Fort Worth became part of the growing military/industrial complex. From stockyards to defense plants, World War II transformed Fort Worth from agriculture and mavericks to manufacturing and the military.
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Chiu, Simon. "Characterization of ultra wideband and propagation in aircraft and outdoor industrial environments." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/14694.
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The channel modeling committees of the IEEE 802.15.3 a and 802.15 .4a task groups
devoted considerable effort to developing ultrawideband (UWB) wireless channel
models applicable to systems that operate between 3.1 and 10.6 GHz under both line-ofsight (LOS) and non-line-of-sight (NLOS) conditions in residential, office, outdoor, industrial and body-centric environments at ranges up to 15 m. However, there has been increasing demand for deploying wireless systems in other unconventional environments that have not yet been well characterized. In this thesis, we present four major contributions concerning two such environments: the passenger cabin of a typical midsize airliner and outdoor industrial. First, we have characterized TJWB path gain and
time dispersion over the range 3.1-10.6 GHz within the empty passenger cabin of a
Boeing 737-200 aircraft based on several hundred measured complex channel frequency
responses (CFRs). We found that: (1) the coverage pattern takes the form of chevronshaped contours with path gain decreasing least rapidly along the aisle seats and most rapidly along the window seats, and (2) there is significant advantage to using higher portions of the UWB band for short-range applications and reserving lower portions of the band for longer range applications in such environments. Second, we have characterized the shape of the UWB channel impulse response (CIR) and the fading statistics experienced by individual multipath components (MPCs) over the range 3.1-
10.6 GHz within the Boeing 737-200 aircraft based upon 3300 measured CFRs. We have
also modified the channel simulator developed by IEEE 802.15.4a to generate UWB
CIRs that are representative of those that we observed within the cabin. Third, we have
characterized the effect of human presence on path gain and time dispersion over the
range 3.1-6.1 GHz within the passenger cabin of the Boeing 737-200 aircraft with and
without volunteers in the passenger seats based on a few hundred measured CFRs. We
found that human presence has substantially effects on RF propagation within the aircraft
and that it should be considered when characterizing the performance of in-cabin
wireless systems. Lastly, we present a range-extended VNA-based UWB channel sounder suitable for characterizing UWB propagation in outdoor industrial environments.
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Mo, Yuet-ha Rita, and 巫月霞. "An international comparison of the accounting treatment of aircraft leasing in airline accounts." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1989. http://hub.hku.hk/bib/B3126444X.
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Mo, Yuet-ha Rita. "An international comparison of the accounting treatment of aircraft leasing in airline accounts /." [Hong Kong] : University of Hong Kong, 1989. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12373904.
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Lee, Wei-Wei. "Optimal trade and industrial policies in the market for wide- bodied jet aircraft /." Connect to resource, 1995. http://rave.ohiolink.edu/etdc/view.cgi?acc%5Fnum=osu1263404428.
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Safavi, Edris. "Collaborative Multidisciplinary Design Optimization : A Framework Applied on Aircraft Systems and Industrial Robots." Licentiate thesis, Linköpings universitet, Maskinkonstruktion, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-91292.
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In a product development process, it is crucial to understand and evaluate multiple and synergic aspects of systems such as performance, cost, reliability and safety. In order to improve the foundations for decision-making, this thesis presents methods that are intended to increase the engineering knowledge in the early design phases. In complex products, different systems from a multitude of engineering disciplines have to work tightly together. Collaborative design is defined as a process where a product is designed through the collective and joint efforts of domain experts. Thus, a Collaborative Multidisciplinary Design Optimization (CMDO) process is proposed in the conceptual design phase in order to increase the likelihood of more accurate decisions being taken early on. To enable higher fidelity based CMDO, it is necessary to validate the tools and models utilized. This can be done with so-called low cost demonstrators. The physical demonstrators increase the engineer’s confidence regarding the final product by validating the models as well as revealing many unknowns and thus further increasing the engineering knowledge. The performance of the presented methods is demonstrated with two industrial applications, aircraft conceptual system design and industrial robot design.
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Roskvist, Jimmy, and Richard Rydell. "Konceptframtagning av inspektionspluggar till flygmotorer." Thesis, University West, Department of Engineering Science, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-1634.
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This report describes the results of the project "Concept development of jet engine inspection plugs" carried out in the spring of 2008. The work was done at the department of product definition at the company Volvo Aero in Trollhättan. The objective of the work was to develop concepts for a "Volvo-unique" inspection plug. The work is part of Volvo Aero's focus on proprietary (self-developed) technologies. Inspection plugs can be found on virtually all aircraft engines and gas turbines. They are used during inspections with fiber optics done at regular intervals during engine operation. Since the inspection plugs are screwed in and out many times during the life of an engine, it is important that the handling (the assembly and disassembly) is simple. It is also very important that the plugs are properly fixed in position to prevent them from coming off during operation. The focus of the work was to develop proposals on how the assembly and fixing of plugs could be designed to simplify the handling and have adequate and simple function. The procedure during the work was to first study relevant theory and methods that could be used. Then development was carried out according to the first steps of the systematic design methods. These steps include product specifications, concept generation, evaluation and selection of concepts, and development of selected concept. During the implementation, a number of tools and methods, including QFD, FMEA and decision matrices were used. Out of 14 developed concepts, two were chosen for comparison with a leading rival. Both developed concepts turned out to outscore the competitor and the main difference was the cost of production. One of the concepts was considered to have advantages over the other and was consequently chosen for further development. Geometry, manufacturing, materials, sealing and misalignment were the focus areas of the development. CAD models were made of the various design ideas that were identified and one principal inspection plug was recommended for further development.
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Rouaud, Laurent. "New contenders in the large commercial aircraft manufacturing industry." Toulouse 1, 2010. http://www.theses.fr/2010TOU10084.
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The incumbent firms in the large commercial aircraft industry (LCA) oligopoly are faced with many short to medium term challenges that will shape their future competitiveness. The financial crisis has accelerated the market dynamics that are driving these challenges. Among them, the sustainable growth of air travel, the increasing costs of new programs and the threat of the new contenders entering the LCA top the list. For all the players and potential players, innovation and internationalization of the supply chain are key determinants of their future competitiveness. The main objective of the thesis is to assess the capacity of emerging countries to turn into innovation powerhouses and become leaders in the large commercial aviation business. The research integrates the supply (technology, structure of the firm, internationalization, strategy, government policy) and the demand side (effect of the airlines market and business strategy on the LCA manufacturers’s strategy). Most of the research in this field have concentrated on the supply side. The thesis focuses on understanding the reasons for the strategic importance of civil aviation in government policy, defining the key determinants of competitveness in the LCA industry, and analyzing the market entry of incumbent firms. More importantly, the research proposes a metric and a cluster analysis to determine whether or not China has the ability to be innovative and to become a leader in the commercial aircraft business.
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Al, Fazari Hamdan. "Fuzzy quality function deployment for aircraft maintenance organizations." Toulouse, INSA, 2008. http://eprint.insa-toulouse.fr/archive/00000283/.
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In this thesis, Quality Function Deployment for aircraft maintenance organizations is considered. Assessment and evaluation of quality management in aircraft maintenance organizations is the key to ensure safety, reliability, and the assurance of quality. At present, companies around the world have an absolute need for quality management systems in order to help them to develop and manage better their activities. Improving the way in which organizations handle their organizational management plays a major role in raising the standard of the quality of the product or the quality of the service they deliver. The challenge of implementing quality approaches in the management of aircraft maintenance organizations is appealing since it is recognized to save time and money. As a result, the organization can become more efficient, more competitive in its domain and finally more profitable. Quality management is, therefore, an essential function for maintaining and improving the quality of the services and products provided by aircraft maintenance organizations. First necessary background and theoretical knowledge on aircraft maintenance organizations and quality management is presented in detail. This is achieved by performing an analysis of the needs and the means for improving quality in the maintenance activities. The proposed analysis approach is a combination of Quality Function Deployment, and Fuzzy Logic theory. The Quality Function Deployment is used as an analysis tool to translate the customer needs and requirements into service features. The Quality Function Deployment involves the construction of a matrix structure which allows the assessment and ranking of different course of action with respect to quality. Since many opinions from experts are expressed in linguistic terms it appeared that fuzzy logic could improve this analysis process. Then, the final part of the thesis is devoted to the development of a fuzzy quality function deployment. The proposed analysis approach is then illustrated in the case of aircraft maintenance organizations where the objective is to increase fleet availability, maintain aircraft reliability, decrease servicing time, and limit investment costsDans cette thèse, le déploiement de la fonction de la qualité pour l'organisation de l'entretien des avions est considérée. L'évaluation de la gestion de la qualité dans les organismes de maintenance des avions est la clé pour garantir la sécurité, la fiabilité et l'assurance de la qualité. De nos jours, les entreprises partout dans le monde ont un besoin absolu de systèmes, gestion de la qualité afin de les aider à développer et à mieux gérer leurs activités. La façon dont les organisations gèrent leurs gestions de l'organisation joue un rôle majeur dans l'amélioration du niveau de la qualité du produit ou la qualité du service qu'elles fournissent. Le défi de la mise en œuvre de la démarche qualité dans la gestion de la maintenance des avions est important car il doit conduire à des économies de temps et d'argent. La gestion de la qualité est, par conséquent, une fonction essentielle pour maintenir et améliorer la qualité des services et produits offerts par les organismes de maintenance des avions. Dans cette thèse les prés requis et connaissances théoriques sur l'organisation de la maintenance et la gestion de la qualité sont présentés en détail. Ceci est réalisé en effectuant une analyse des besoins et des moyens pour améliorer la qualité dans les activités d'entretien. L'approche d'analyse proposée est une combinaison du déploiement de la fonction de la qualité et de la Logique Floue. Le déploiement de la fonction de la qualité est utilisé comme un outil d'analyse pour traduire les besoins des clients et les besoins en qualité des services. Le déploiement de la fonction de la qualité comprend la construction d'une structure matricielle permettant d’évaluer et de comparer les différents plans d’action. Puisque de nombreuses opinions d'experts sont exprimées en termes linguistiques, il semble que la Logique Floue pourrait améliorer ce processus d'analyse. La dernière partie de cette thèse est consacrée à l'élaboration du déploiement de la fonction de la qualité dans le cadre de la Logique Floue. L'approche d'analyse proposée est ensuite illustrée dans le cas de l'organisation de l'entretien d’une flotte d’avions. L'objectif est d'augmenter la disponibilité de la flotte, de maintenir sa fiabilité, de diminuer le temps du service de maintenance, de limiter les coûts d'investissement
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Mayindi, Daphney Hellen. "Industrial capability and national technological competitiveness the case of South Africa's civil aircraft industry /." Thesis, Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-05132009-141815/.
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Chintamaneni, Prashantkumar. "INTEGRATION OF UNIGRAPHICS AND COST ADVANTAGE FOR AIRCRAFT ENGINE PARTS CONFIGURATION." Ohio University / OhioLINK, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1171569577.
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Isaksson, Robert. "Drilling with force feedback." Thesis, Linköping University, Automatic Control, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-20897.
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Industrial robots have been used for a long time in the industry. Despite this thedevelopment of advanced force control system using industrial robots is relativelylimited. Using force controlled robot systems expands the possibility of what canbe done with industrial robots.Previously a force feedback system for a standard industrial robot from ABBhas been developed. The system is developed towards the aircraft industry, where amounted drill machine on the robot has to fulfill the requirements in robot drillingin aircraft structures. This thesis presents experimental results and improvementsof this industrial robot system. Mechanical modifications and tests of a new endeffector are analyzed.
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Pepper, Brian P. "Evaluation of process models to estimate time to produce aircraft engine part features." Ohio : Ohio University, 2002. http://www.ohiolink.edu/etd/view.cgi?ohiou1174932009.
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Islam, Md Rubayat Ul. "Utilizing Scenario Based Simulation Modeling to Optimize Aircraft Fleet Scheduling." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1560965666900518.
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Raciti, Stefano. "A twenty DOF element for nonlinear analysis of unsymmetrically laminated beams." Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/44062.
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The purpose of this study was to develop a simple one- dimensional finite element for the nonlinear analysis of symmetrically and unsymmetrically laminated composite beams including shear deformation. There is a need for a simple and efficient method for analyzing unsymmetrically laminated beams since no other study on this topic is currently available. The beam element has ten degrees of p freedom at each of the two nodes: the axial displacement, the transverse deflection due to bending and shear, the twisting angle, the inplane shear rotation, and their derivatives along the axial direction. The formulation, solution procedure, and the computer program have been evaluated by solving a series of examples on the static response, free vibration, buckling, and nonlinear vibrations of isotropic and laminated beams. For unsymmetrically laminated beams, the nonlinear vibrations were found to have a soft spring behavior for certain boundary conditions as opposed to a hard spring behavior observed in isotropic and symmetrically laminated beams. The inplane boundary conditions were found to have a significant effect on nonlinear responses.Master of Science
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Borille, Anderson Vicente. "Decision support method to apply Additive Manufacturing Technologies for plastic components in the aircraft industry." Instituto Tecnológico de Aeronáutica, 2009. http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=1916.
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Additive Manufacturing Technologies (AMT) are a collection of manufacturing processes driven by CAD data to produce physical models and parts by means of additive techniques. They are based on a layer-by-layer material consolidation process instead of the traditional methods. Due to machine and material developments, such processes may be used to produce final products, not only prototypes. The use of AMT to produce end-use parts is known as Rapid Manufacturing (RM). The main advantages AMT are related to the ability to build geometrically complex shapes without tooling and with high process automation. At small lot sizes, such as with customized products, traditional manufacturing technologies become expensive due to high costs of required tooling. Small lot sizes and complex shaped parts are typical features encountered in the aircraft industry. Nowadays, two Additive Manufacturing Technologies are able to process plastic materials which comply flammability requirements: Fused Deposition Modeling (FDM) and Selective Laser Sintering (SLS). The main objective of this work is to propose a decision support method based on processes technological information concerning Rapid Manufacturing of plastic parts for aircraft cabin interiors. Thus, both FDM and SLS process are compared regarding their functionality (software interface), tensile strength, accuracy and part definition, surface roughness, build time and costs. The analyzed materials are the Polyamide with flame retardant (PA2210FR) additives and the Polyphenylsulfone (PPSF) for SLS and FDM process respectively. These materials were selected because they were the available flame retardant materials for AMT as the beginning of this work. A method is proposed to consider AMT possible advantages and restrictions when considering the manufacturing process. It is proposed that design modifications to improve part';s functionality or performance may be manufactured by AMT. Further, the method proposes the decision procedure to evaluate quality, production time and cost. The author illustrates the method with examples on the selection of manufacturing technology to produce a customized decoration part and an air duct. Typical costs and manufacturing time of injection molding processes were also compared and analyzed with the proposed method. It is possible to define the break-even point, when conventional processes become preferred then AMT.
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Hu, Kai. "Solving Inverse Problems Using Particle Swarm Optimization: An Application to Aircraft Fuel Measurement Considering Sensor Failure." Cincinnati, Ohio : University of Cincinnati, 2006. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=ucin1141398269.
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Thesis (M.S.)--University of Cincinnati, 2006.Title from electronic thesis title page (viewed Apr. 19, 2006). Includes abstract. Keywords: Inverse Problem, Particle Swarm Optimization, Neural Networks, Aircraft Fuel Measurement, Sensor Failure Includes bibliographical references.
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Flachowsky, Sören. "»Das größte Geheimnis der deutschen Technik«: Die Entwicklung des Stratosphärenflugzeugs Ju 49 im Spannungsfeld von Wissenschaft, Industrie und Militär (1926–1936)." Technische Universität Dresden, 2008. https://tud.qucosa.de/id/qucosa%3A25368.
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Aus der Einleitung:
'Am späten Nachmittag des 14. März 1931 versammelten sich in Groß-Kühnau bei Dessau zahlreiche deutsche und amerikanische Wissenschaftler, um einem spektakulären Ereignis beizuwohnen. Geladen hatten der ehemalige Junkers- Ingenieur Johannes Winkler und dessen Mäzen, der böhmische Hutfabrikant Hugo Hückel, denen vor den Augen eines staunenden Publikums der erste Start einer Flüssigkeitsrakete in Europa glückte. Der Flugkörper, eine Konstruktion von 70 Zentimetern Höhe und 30 Zentimetern Durchmesser, hob mit dumpfem Zischen vom Erdboden ab, stieg etwa 100 Meter in die Höhe und stürzte nach einer horizontalen Drehung wieder zu Boden. Nach diesem erfolgreichen Versuch überschlugen sich die Sensationsmeldungen in der Presse, die verkündete, dass der Vorstoß in den Weltraum nur noch eine Frage der Zeit sei. Denn nach dem Zweck seiner Rakete befragt gab Hückel an, sie solle in erster Linie der „Erschließung des luftleeren und luftverdünnten Raumes in der Stratosphäre dienen“.
Zur gleichen Zeit, in der Winkler und Hückel den ersten erfolgreichen Start ihrer Rakete vollführten, arbeitete ein kleiner Stab von Ingenieuren in den nicht weit entfernten Junkerswerken in Dessau an dem streng geheimen Projekt eines Stratosphären-Flugzeugs, mit dem man ebenfalls anstrebte, in größte Höhen vorzudringen. Gerüchte über dieses Flugzeug kursierten schon seit längerer Zeit, doch hatte die Presse bis dahin vergeblich versucht, darüber Informationen von Junkers zu erhalten. Als dieser nun im Frühjahr 1931 auf das gesteigerte öffentliche Interesse reagierte und erste Details über seine Neuentwicklung preisgab, prognostizierten nicht wenige das Ende der noch jungen Raketen-Träume, schien doch mit der von Junkers gebauten Maschine nicht nur der bemannte, sondern vor allem der kontrollierte und somit sichere Flug in bis dahin unbekannte Höhen nun unmittelbar bevorzustehen.'
[...]:Einleitung S. 3
Voraussetzungen und technische Probleme des Höhenfluges S. 5
Initiative der Gesellschaft für Höhenflugforschung S. 7
Atmosphärenforschung als Schwerpunkt der Notgemeinschaft S. 8
Kongruenz der Interessen: Junkers, Notgemeinschaft und Luftrüstungskartell S. 11
Entwicklung des Stratosphärenflugzeugs Ju 49 S. 17
Zusammenfassung S. 21
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Badalló, i. Cañellas Pere. "Analysis and optimization of composite stringers." Doctoral thesis, Universitat de Girona, 2015. http://hdl.handle.net/10803/323087.
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The use of the stiffened panels in the aircraft/aeronautical industry has been growing in the last decades. On the other hand, the exponential growth in the use of composite materials in the last years has had a strong
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influence in these structural components and in the industry in general. In consequence, with this new material unknown characteristics appear, for example new failure mechanisms, producing high complexity when simulation, analysis and testing are performed. For this reason, thanks to the increment in the power of the computers, the use of virtual tests with finite element method has become crucial in the simulation of the components with high structural responsibility. In the same way, the general spread of computational resources has made possible the use of optimization methods in the design process of stiffened panels. Optimization methods are able to find the best design according to some criteria, by modifying different parametersL'ús de panells rigiditzats a la indústria aeronàutica i aeroespacial ha anat creixent les darreres dècades. Per altra banda, el creixement exponencial de l'ús dels materials compòsits en els últims anys també ha tingut una forta incidència en aquests components estructurals i en la indústria en general. Aquest nous materials fan aparèixer comportaments desconeguts fins al moment, com per exemple l'aparició de nous mecanismes de fallada. Aquests fets provoquen que el càlcul, anàlisi i assaig d'estructures de material compòsit sigui complex. Per aquest motiu, sumat a l'augment de potència de càlcul dels ordinadors, l'assaig virtual amb el mètode dels elements finits ha anat agafant una importància cabdal en el càlcul de components d'alta responsabilitat estructural. De la mateixa manera, l'intent de millorar els panells rigiditzats ha portat a utilitzar mètodes d'optimització. Modificant diferents paràmetres es busca dissenyar panells rigiditzats per realitzar una tasca desitjada de manera òptima
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Peschiera, Franco. "Exact and heuristic methods to optimize maintenances and flight schedules of military aircraft." Thesis, Toulouse, ISAE, 2020. http://www.theses.fr/2020ESAE0034.
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Cette thèse étudie le problème de planification de vol et de la maintenancedes avions militaires. D’abord, nous étudions la complexité de ce problème d’optimisation.Puis, nous proposons un modèle de programmation linéaire en nombres entiers (PLNE) pourle résoudre. Nous construisons un générateur d’instances et une heuristique pour générer dessolutions initiales. Ensuite, nous appliquons l’Apprentissage Automatique pour améliorer laperformance des modèles PLNE en utilisant des coupes valides générées à partir des conditionsinitiales et des coupes apprises à partir de la prédiction des caractéristiques de solutionsoptimales. Ces coupes sont appliquées à un nouveau modèle PLNE. Le résultat est une réductiondu temps de résolution avec peu de pertes d’optimalité et de faisabilité par rapport auxméthodes matheuristiques alternatives. Finalement, nous présentons une nouvelle matheuristiquepour résoudre efficacement des grandes instances. La méthode utilise une descente àvoisinage variable qui combine la programmation dynamique (DP) et l’horizon glissant. LaDP exploite une représentation en graphe de l’espace des solutions de chaque avion. Le résultatest des solutions rapides et presque optimales, et un passage à l’échelle efficace pourdes instances de très grande tailleThis thesis studies the long term Military Flight and Maintenance Planningproblem. First, we evaluate the complexity of this optimisation problem. Then we propose aMixed Integer Programming (MIP) model to solve it. We develop an instance generator anda heuristic to generate initial solutions. Furthermore, we apply Machine Learning to improvethe performance of the MIP model by using valid cuts generated on the basis of initialconditions and learned cuts based on the prediction of characteristics of optimal solutions.These cuts are applied to a new MIP model. This results in reductions in the solutiontime with little losses in optimality and feasibility in comparison to alternative matheuristicmethods. Finally, we present a new matheuristic to efficiently solve large instances. Themethod employs a Variable Neighborhood Descent that combines Dynamic Programming(DP) and Rolling Horizon neighborhoods. The DP is applied to a graph representation of thesolution space for a single aircraft. This results in fast good quality solutions and an efficientscaling for very large instances
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Oliveira, Luiz Guilherme de. "A cadeia de produção aeronautica no Brasil : uma analise sobre os fornecedores da Embraer." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/286709.
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Orientador: Roberto Carlos BernardesTese (doutorado) - Universidade Estadual de Campinas, Instituto de Geociencias
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Resumo: A produção de aeronaves no Brasil pode ser considerada um caso atípico nas trajetórias tecnológicas dos países de industrialização tardia. Afinal, trata-se de um produto de alto conteúdo tecnológico, produzido por uma empresa de origem de capital nacional. Onde o desenvolvimento de produto ocorre de forma autônoma, mesmo que através de parcerias estratégicas com outras empresas, que produzem - principalmente - sistemas aeronáuticos. O objetivo deste trabalho é analisar a lógica de organização da cadeia aeronáutica, que está desenhada em função da Embraer. Inicialmente, temos que ter em mente que toda a cadeia aeronáutica nacional trabalha em função da Embraer. Desta forma, todos os fornecedores, de origem de capital nacional ou de capital externo, dependem da concepção do projeto gerenciado pela Embraer. A gestão de projeto toma-se uma variável determinante para as possibilidades de adensamento da cadeia. Destaca-se que esta gestão de projeto segue uma tendência de comportamento comum a todas grandes empresas integradoras, sendo fruto da evolução de todo um setor econômico, dominado principalmente por dois grandes grupos (Boeing e Airbus). Ao mesmo tempo o fato da Embraer conceber um projeto de aeronave em um país de industrialização tardia exige que a empresa incorpore inovações que permitam uma inserção positiva em um mercado internacional altamente concorrêncial. Desta forma, a Embraer realiza uma constante modificação no desenho da cadeia de fornecedores, que se mostra cada vez mais internacionalizado. Por sua vez, os fornecedores locais se debatem de forma intensa com um número maior de barreias de entrada, que surgem principalmente através de dificuldades de acessos a tecnologias criticas e formas de financiamento. A criação da matriz de capacitação destes fornecedores explicita o grau de distanciamento entre fornecedores locais de aeroestruturas e os fornecedores (parceiros de risco) de sistemas aeronáuticos. Quanto às políticas públicas para o setor, elas se mostram pouco efetivas, muito em função da pouca capilaridade das agências de fomento. Constatase, paradoxalmente, que o país possui um ambiente propício para a concepção e integração de aeronaves, atividade altamente estratégica e agregadora de valor, mas ao mesmo tempo apresenta um ambiente hostil para a produção e desenvolvimento de aeroestruturas e sistemas. As conseqüências são claras: um crescimento nas atividades de integração e concepção de projeto, porém, ao mesmo tempo uma atividade de produção de aeroestruturas e de sistemas cada vez mais reduzida e precária. Questiona-se, no entanto, a existência de alguma alternativa que não penalize a empresa coordenadora da cadeia. Este trabalho busca auxiliar a reflexão sobre esta questão a partir da análise das competências dos fornecedores locais da Embraer
Abstract: The manufacturing of a1rcrafts m Brazil can be considered a singular case m the technological trajectory of deve1opmg countries. After all, this is a product with high technologic content, manufactured by a domestic company, where the development of products takes place m an autonomous way, even thought strategic partnerships with other companies (mainly, avionic systems producers). The objective of this study is to analyze the logic of the organization of the aeronautic chain m Brazil, which has Embraer as its core company. First of all, we need to keep in mind that the whole domestic aeronautic chain works m connection with Embraer. Therefore, all suppliers, domestic or foreign owned ones, rely on the conception of the project managed by Embraer. The management of the project becomes a determining factor for the possibilities of strengthening the production chain. The management of this project follows a common trend among all the large integrator companies, as a result of the evolution of an economic sector mainly ruled by two large groups (Boeing and Airbus). At the same time, the fact that Embraer is established in a developing country requires that the company assembles innovations that allow for a positive participation m the high1y competitive international market. In this regard, Embraer performs a constant modification of its supplier's chain framework, which is increasingly internationalized. As a result, domestic suppliers are facing a significant larger number of hurdles, such as difficulties to access critical technologies and financing. The establishment of a qua1ifying matrix for these suppliers outlines the leveI of distance between domestic suppliers of "aeroparts" and suppliers (risk partners) of avionic systems. Regarding public policies for the sector, they have not been very effective, due to the low degree of capillarity of the supporting agencies. Although Brazil has a favorable environment for the conception and integration of a1rcrafts, an activity that is high1y strategic and that adds value to the product, at the same time Brazil has a hostile environment for the production and development of "aeroparts" and systems. The consequences are c1ear: the increase of integration activities and project conception m the country, followed by the decrease m the production of" aeroparts" and systems. Is there any alternative that would not damage the company that coordinates the production chain? This study is aimed at fostering the discussion of these issues from the analysis of the capabilities of Embraer's domestic suppliers
Doutorado
Doutor em Política Científica e Tecnológica
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Shelton, Mona C. "The use of reciprocal interdependencies management (RIM) to support decision making during early stages design." Diss., Mississippi State : Mississippi State University, 2008. http://library.msstate.edu/etd/show.asp?etd=etd-09112007-142652.
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Spadafore, Annemarie Michaela. "Excess Baggage: Weighing the Contribution of Political and Corporate Interests in the W.T.O. Cases over Commercial Aircraft Subsidies." Oxford, Ohio : Miami University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=miami1218774986.
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Sakinç, Mustafa Erdem. "Innovation or Financialization? : The Evoloution of the Systems-Integration Buisness Model at Airbus and Boeing." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0093/document.
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S’appuyant sur une approche comparative et historique au niveau de la firme, cette thèse étudie les dynamiques de la réussite économique à long terme de la construction d'avions civils aux Etats-Unis et en Europe. Cette analyse est menée à partir de l’étude d’Airbus et de Boeing qui sont les deux plus grandes firmes du secteur aéronautique au niveau mondial. La thèse identifie les conditions sociales qui influencent les capacités concurrentielles des deux firmes et les pratiques qui jouent un rôle sur l’amélioration ou la dégradation des capacités productives de leur secteur à travers un cadre analytique basé sur les modèles productifs / les modèles d’affaires (productive/business models). Les trois éléments majeurs de l’activité productive au niveau de la firme, à savoir la stratégie d’entreprise, la structure organisationnelle et le degré d’engagement financier sont analysés dans ce cadre appliqué à l’intégration de systèmes. Les résultats de cette recherche montrent qu’il existe une forte corrélation entre la sous-traitance massive, la financiarisation des stratégies d’entreprise et les relations conflictuelles de travail. L’évolution des stratégies d’Airbus et de Boeing et leur influence sur l’amélioration ou la dégradation de leurs capacités productives sont fortement liées aux transformations dans le domaine financier et dans l’organisation productive / les relations industrielles qui caractérisent les économies occidentales depuis les trois dernières décennies. Les conséquences des actions menées par les entreprises sur la promotion de l’emploi dans leur(s) pays d’origine sont questionnées et des implications en termes de stratégies d’entreprise et de politiques publiques sont tirées de cette thèseThis dissertation analyzes the dynamics of long-term success in commercial aircraft manufacturing in the US and Europe performed through a historical-comparative methodology employed for firm level analysis. The firm-level case studies are Airbus and Boeing, the two biggest firms in the commercial aircraft manufacturing industry. Through an analytical framework concentrated on business/productive models of corporate activity, the study identifies the social conditions that influence the competitive capabilities of these two companies and their practices in upgrading, or downgrading, the productive capabilities of their respective industries. The three main elements of firm-level productive activity under modern capitalism, namely corporate strategy, organizational structure and financial commitment are analyzed through the lens of the systems-integration business/productive model framework. The results of the research show that there is a strong correlation between extensive outsourcing, financialization of business strategies and conflicting employment relations. Distinct constructive and destructive processes of corporate strategies of Airbus and Boeing are strongly linked to the role of the transformations of finance and work organization/industrial relations in the last three decades in Western economies. The consequences of corporate action on the promotion of secure jobs with positive prospects for their respective economies are questioned and relevant implications are drawn for business and government policy
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Baddour, Nizar. "Etude instationnaire thermomecanique d'un lopin lors d'une operation de forgeage." Toulouse 3, 1988. http://www.theses.fr/1988TOU30176.
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Renart, Canalias Jordi. "Desarrollo de un nuevo ensayo experimental para la evaluación de la calidad de uniones adhesivas entre componentes estructurales de composite para la indústria aeronáutica." Doctoral thesis, Universitat de Girona, 2010. http://hdl.handle.net/10803/296679.
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El uso de los composites en la industria aeronáutica ha experimentado un fuerte crecimiento en los últimos años debido a la utilización de componentes de composite que realizan funciones estructurales. A menudo, para disminuir los costes de producción, las partes esbeltas del fuselaje se unen con elementos rigidizadores mediante uniones adhesivas. Para asegurar que las uniones adhesivas cumplirán la función estructural para la cual se han diseñado se realizan ensayos a nivel de probeta.
En el presente trabajo se realiza un análisis de los métodos de ensayo experimental que se llevan a cabo para determinar la calidad de las uniones adhesivas (las cuales dependen principalmente de la calidad de la preparación superficial, las propiedades del adhesivo y la compatibilidad entre el adhesivo y los adherentes). La tesis se enfoca a dos objetivos: la propuesta de mejoras del ensayo de doble viga en voladizo y el desarrollo de un método alternativo de propagación de grieta por avance forzado de una cuña (Wedge Driven Test, WDT). En cuanto al ensayo de doble viga en voladizo, se han diseñado unos utillajes de sujeción mecánica de la probeta a la máquina de ensayo y se ha propuesto una metodología experimental adaptada a la propagación discontinua del frente de grieta. En relación al nuevo método de ensayo, se ha desarrollado un procedimiento dirigido, al igual que el DCB actual, a determinar la tenacidad a la fractura en modo I de la unión adhesiva, mediante la introducción forzada de una cuña. Las ventajas que ofrece el ensayo WDT respecto el DCB es que es más rápido, económico, no se necesita ningún tipo de preparación previa de la probeta y no hace falta realizar mediciones de la longitud de grieta.
Para poner a prueba la sensibilidad del ensayo WDT a la calidad de la unión se ha realizado una serie de campañas experimentales, en las cuales se han analizado 4 configuraciones de unión adhesiva distintas (como resultado de la combinación de dos adherentes y dos adhesivos). Así mismo se han ensayado preparaciones intencionadamente defectuosas. De los resultados de las campañas experimentales se ha observado que el ensayo de propagación de grieta por avance forzado de cuña presenta unos resultados equivalentes a los del ensayo DCB y es sensible a la calidad de la preparación superficial.The use of composite materials in the aircraft industry has been increasing in recent years due to their application in structural parts. To reduce the production costs of these components the join between skins and stiffeners is made by means of an adhesive. In order to guarantee that the bonded joint fulfils the structural requirements, experimental tests on specimens are done from the first development tasks and throughout the production stages. In the present work, an analysis of the experimental test methods to determine the quality of bonded joints has been performed - the quality of bonded joints depends on the quality of the surface preparation, the adhesive properties and the compatibility between the adhesive and the adherents. The work focuses on two objectives: the improvement of the double cantilever beam test, and the development of an alternative method of bonded joint characterization based on driving a wedge into the adhesive layer (Wedge Driven Test, WDT). In the double cantilever beam test, a mechanical fixture tool has been designed and a data reduction method for stick-slip crack propagation has been developed. On the other hand, the alternative test method such as the DCB, focuses on determining the fracture toughness in mode I of the adhesive joint, by means of introducing a wedge inside the specimen at a constant speed rate. To prove the sensitivity of the WDT to the quality of the adhesive joint, a series of testing campaigns has been performed over 4 adhesive joint configurations (combining 2 adhesives and 2 adherents). Moreover, deliberately produced bad surface preparations have been tested. From the test results, it has been observed that the driven wedge test exhibits an equivalent behaviour to the double cantilever beam test and has a similar level of sensitivity to the quality of the bonded joint.
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Bondouy, Manon. "Construction de modèles réduits pour le calcul des performances des avions." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30027/document.
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L'objectif de cette thèse est de mettre en place une méthodologie et les outils associés en vue d'harmoniser le processus de construction des modèles de performances et de qualités de vol. Pour ce faire, des techniques de réduction de modèles ont été élaborées afin de satisfaire des objectifs industriels contradictoires de taille mémoire, de précision et de temps de calcul. Après avoir établi une méthodologie de construction de modèles réduits et effectué un état de l'art critique, les Réseaux de Neurones et le High Dimensional Model Representation ont été choisis, puis adaptés et validés sur des fonctions de petite dimension. Pour traiter les problèmes de dimension supérieure, une méthode de réduction basée sur la sélection optimale de sous-modèles réduits a été développée, qui permet de satisfaire les exigences de rapidité, de précision et de taille mémoire. L'efficacité de cette méthode a finalement été démontrée sur un modèle de performances des avions destiné à être embarquéThe objective of this thesis is to provide a methodology and the associated tools in order to standardize the building process of performance and handling quality models. This typically leads to elaborate surrogate models in order to satisfy industrial contrasting objectives of memory size, accuracy and computation time. After listing the different steps of a construction of surrogates methodology and realizing a critical state of the art, Neural Networks and High Dimensional Model Representation methods have been selected and validated on low dimension functions. For functions of higher dimension, a reduction method based on the optimal selection of submodel surrogates has been developed which allows to satisfy the requirements on accuracy, computation time and memory size. The efficiency of this method has been demonstrated on an aircraft performance model which will be embedded into the avionic systems
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Lowas, Albert Frank III. "Improved Spare Part Forecasting for Low Quantity Parts with Low and Increasing Failure Rates." Wright State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=wright1432380369.
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Droit, Yohan. "L’avion de combat Rafale : de la matrice européenne à « l’avion mondial » ? : Histoire d’un programme d’armement majeur, des années 1970 à nos jours." Thesis, Paris 4, 2014. http://www.theses.fr/2014PA040246.
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L’avion de combat Rafale est l’aboutissement du programme d’armement le plus important jamais engagé par l’armée de l’air puisqu’il sera, à terme, l’unique avion de chasse en service dans les armées françaises. Par conséquent, il structurera les forces aériennes françaises au moins jusqu’en 2040. Le programme Rafale conjugue des enjeux opérationnels, politiques, industriels et financiers majeurs et constitue à ce titre la quintessence d’un programme d’armement majeur. Cette caractéristique fondamentale nécessite d’adopter une approche transverse afin d’appréhender le plus largement possible les différents enjeux relatifs à sa conduite. Le programme Rafale connaît une trajectoire singulière. Après une première phase de définition s’effectuant dans le cadre d’une coopération européenne, le besoin opérationnel est finalement revu et affiné dans un cadre uniquement national. Cette phase de maturation débouche sur le lancement d’un programme conjoint à l’armée de l’air et à la marine nationale dont la réalisation dans les années 1990 se heurte aux ajustements budgétaires post-guerre froide. Suite à sa mise en service opérationnel au milieu des années 2000, le Rafale est employé avec succès dans les opérations en Afghanistan et en Libye auxquelles la France participe. Parallèlement, l’avion français débute sa campagne d’exportation dont les enjeux sont particulièrement importants pour la politique de défense française. Celui-ci connaît une première consécration avec la décision indienne en janvier 2012 d’engager des négociations exclusives en vue d’acquérir le chasseur françaisThe Rafale fighter is the outcome of the most ambitious armament program ever engaged by the French Air Force. Projected to be the only fighter serving in the French military in the coming decades, it will shape the French Air Forces until 2040. The Rafale program intertwines military, political, industrial and financial interests at the highest levels of the French government and represents the essence of a French major armament program. This essential feature requires a comprehensive approach in order to meet this broad array of interests. The Rafale program has had a specific trajectory. After an initial definition stage which took place in the context of European cooperation, the operational need was finally reviewed on a national basis. This phase resulted in the official launch of the Rafale program both for the French Air Force and the French Navy. During the 1990s, it faced a severe budget constraint which hampered development and production. Following its initial operating capability in the mid-2000s, the Rafale fighter was successfully employed in operations in Afghanistan and Libya. Simultaneously, the Rafale began its marketing campaign to win international bids. The Rafale realized its first achievement with India’s decision, in January 2012, to purchase the French fighter
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Bellet, Michel. "Modelisation numerique du formage superplastique de toles." Paris, ENMP, 1988. http://www.theses.fr/1988ENMP0082.
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Caracterisation generale de la superplasticite et du procede de mise en forme des toles par pression gazeuse. Presentation d'une modelisation numerique permettant une meilleure maitrise de ce procede de fabrication notamment utilise dans l'industrie aeronautique pour le formage de pieces de structures en toles d'alliages de titane ou d'aluminium
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Coutant, Hadrien. "Un capitalisme d'ingénieurs : construire un groupe aéronautique après une fusion." Thesis, Paris, Institut d'études politiques, 2016. http://www.theses.fr/2016IEPP0031/document.
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Cette thèse interroge la dynamique d’intégration d’un groupe industriel après une fusion. Elle se fonde sur la trajectoire de l’entreprise aéronautique Safran, entre 2005 et 2015. A partir d’une ethnographie dans une division de Recherche et Développement en électronique embarquée, de cent soixante entretiens et de littérature grise, elle étudie les stratégies et dispositifs d’intégration et leur mise en œuvre à deux niveaux de l’entreprise : la direction générale et des équipes d’ingénierie. L’objet de cette thèse est de comprendre comment, dans une entreprise créée par une fusion, est produite cette intégration face à différentes forces centrifuges et conflictuelles, à ces deux niveaux. Ce cas montre comment est construit un nouvel ordre politique dans une entreprise autour de structurations organisationnelles fondées sur des imbrications sociotechnique et d’une idéologie professionnelle d’ingénieurs. Ce « capitalisme d’ingénieurs », notion qui permet d’expliquer le mode d’intégration spécifique de Safran, s’inscrit dans la trajectoire de la pensée technocratique des grands corps d’ingénieurs français mais est rendue économiquement viable dans l’entreprise par la forme du marché aéronautique et le type de concurrence qui s’y joue. C’est le moyen pour la direction de faire converger une stratégie de marché, un enrôlement des actionnaires – dont l’Etat – et une intégration interne à la firme. Cette stratégie d’intégration est confrontée aux dynamiques contradictoires de rationalisation du travail de R&D. La thèse articule dans le cas d’une firme, une analyse de sociologie de l’entreprise et des organisations avec une sociologie économique et une sociologie du travailThis thesis explores the post-merger integration dynamics of an industrial group, following the path of a French aeronautics firm, Safran, between 2005 and 2015. Based on an ethnography of the Research and Development division producing aeronautic on-board electronics, 160 interviews and review of grey literature, the thesis analyzes the integration strategies and devices at two distinct levels – top management and engineering teams. This thesis aims to understanding how integration is produced at both levels after a merger, against conflicting and centrifugal forces. The Safran case shows how a new political order is built in a firm around organizational structures based on sociotechnical interdependences and engineers’ professional ideology. This “engineering capitalism” – a notion that explains and characterizes the specific mode of integration at Safran – is linked with the technocratic thought of the French engineering grands corps. It is made economically viable by the shape of the aeronautics market and the kind of competition that takes place within it. It is a means for the top management of the firm to collectively articulate a market strategy and shareholders’ enrollment – including the State as a shareholder – with the internal integration of the enterprise. This work is based on a combination of sociology of organizations and firms, economic sociology and sociology of work
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Campagnac, Marie-Hélène. "Structures et proprietes mecaniques d'alliages de titane a bas transus ti-10v-2fe-3al et ti-10v-3cu-al." Paris 6, 1988. http://www.theses.fr/1988PA066115.
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Etude par microscopie electronique en transmission et par diffraction de rayons x de l'evolution structurale au cours de revenu allant de 300 a 525c. Ces etudes montrent que la morphologie et la distribution de la phase alpha peuvent etre controlees par traitement thermique. Etude de l'influence des parametres: double mise en solution, double revenu, vitesse de montee en temperature sur les proprietes de traction et de tenacite. Comparaison entre les deux alliages
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Wojtusik, Thaddeus A. "Competition, technical writing and the aerospace industry : Sikorsky Aircraft Corporation, 1929 to the present /." 2003. http://www.consuls.org/record=b2589983.
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Thesis (M.A.)--Central Connecticut State University, 2003.Thesis advisor: Robert S. Wolff. " ... in partial fulfillment of the requirements for the degree of Master of Arts." Includes bibliographical references. Also available via the World Wide Web.
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Fu, Shian-dun, and 傅憲端. "The Study of Aircraft Industries for Airplanes Maintenance Requirement and Reliability Program Improvement." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/42583823520485348712.
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碩士國立中央大學
工業管理研究所碩士在職專班
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The most important factor to keep the flight safety of airplanes and economic operations is the maintenance and engineering process of airplanes. And the core techniques are divided into three dimensions as follow: a) Airplanes Maintenance Requirement Program, b) Airplanes Reliability Program, and c) Maintenance Operation Planning Program. Those dimensions should be linked up tightly to make a guarantee for the flight operational safety of airplanes and the reduction of maintenance cost for airplanes. Besides, the difficulty of the airlines management is the existence with each other of those three dimensions during the planning of maintenance operations and the high complexity. In addition, airlines should collect and analyze the history of flight operations for improvement. Furthermore, the cost profit is another important factor need to be concerned. The successful flight operation depends on the complete maintenance planning. After all, a safety flight which is on schedule will make passengers feel satisfied. From the point of view of this case study, the related flight cost structure and profit of airlines operations and maintenance is enough to analyze the benefit of executive for the requirement planning of whole maintenance for airlines, the reliability program and the coordinate maintenance operation planning for proposing the improvement plan and solution. Using the maintenance operation planning as a beginning point and the maintenance requirements planning and the reliability program as a scope to proceed the self-criticism and analysis of the maintenance systems to regard as a foundation of improvement. In conclusion, the integrated continuously airworthiness is the major mission of airlines for flight safety and compliance aviation regulation. And it is required to improve the imperfection matters consistently to reduce the maintenance operation cost.
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Monahan, Kayla M. "Aircraft Demand Forecasting." 2016. https://scholarworks.umass.edu/masters_theses_2/329.
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This thesis aims to forecast aircraft demand in the aerospace and defense industry, specifically aircraft orders and deliveries. Orders are often placed by airline companies with aircraft manufacturers, and then suddenly canceled due to changes in plans. Therefore, at some point during the three-year lead time, the number of orders placed and realized deliveries may be quite different. As a result, orders and deliveries are very difficult to predict and are influenced by many different factors. Among these factors are past trends, macroeconomic indicators as well as aircraft sales measures. These predictor variables were analyzed thoroughly, then used with time series and multiple regression forecasting methods to develop different forecasts for quarterly and annual orders and deliveries. The relative accuracies of forecasts were measured and compared through the use of Theil’s U statistic. Finally, a linear program was used to aggregate multiple forecasts to develop an optimal combination of all forecasts. In conclusion, the methods employed in this thesis are quite effective and produce a wholesome aggregate forecast with an error that is generally quite low for a forecasting task as challenging as this one.
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"Defense production and industrial development : the case of Japanese aircraft." MIT Japan Program, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/17077.
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Li, Chiang-Shang, and 李江尚. "The Future and Conception of Militrary Aerospace Industrial Policy in Indigenous Military Aircraft." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/3q53xh.
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碩士靜宜大學
管理碩士在職專班
105
Facing the future challenge and international competition, we need make the proper strategy to integrate and use of our national resources for national security. The core of this research is the thinking of national strategy. Now,Taiwan has established the productivity 4.0 development project by pushing industrial transformation and by upgrading with creating a new industrial supply chain in order to achieve the goal of producing indigenous fighter. In this research, we found that we have to build our own aviation and atmosphere industries, which can ensure our defense strategy independence and enhance the competition power for national economics. In order to establish the Brand New Structure to achieve the goal that we set, we are going to adopt the Strength Weakness Opportunity Threat (SWOT) analysis method of Strategic management to accomplish this task in the report.
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PAPAZIAN, BRUCE. "STRUCTURAL EQUATION MODELS OF SUBJECTIVE MENTAL WORKLOAD: TASK AND INCUMBENT FACTORS (LISREL, APPLIED STATISTICS, HUMAN FACTORS, AIRCRAFT MAINTENANCE, COVARIANCE STRUCTURES)." 1985. https://scholarworks.umass.edu/dissertations/AAI8517136.
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Based on an extensive literature review, twenty-two variables including both task and incumbent characteristics were ordered in a theoretical causal hierarchy for subjective mental workload estimates. Data were collected from two samples of aircraft maintenance personnel to enable the exploration of several latent and observed variable structural equation models that were consistent with this hierarchy. LISREL VI was used to estimate the parameters of these models and test their goodness of fit. An observed variable model was chosen as best fitting and its stability was assessed through simultaneously estimating its parameters from two samples of data. Eighty-six percent of the model's parameters were able to be constrained to be equal for the two samples. The strengths and weaknesses of this model and the techniques used to develop it are discussed with particular emphasis given to the problems of multicollinearity, the assessment of goodness of fit and the heuristic value of developing such models. One of the most interesting results of the study was that individual difference variables were found to consistently influence mental workload estimates. The general trend of their influence was such that higher ability people tended to rate given tasks as more demanding of mental workload than lower ability people.
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Liu, Cheng-hsiung, and 劉正雄. "The Fuzzy Competitiveness Comparison Analysis of Commercialization of Military Aircraft Maintenance in Domestic Aerospace Industry－A Case Study of Aerospace Industrial Development Corporation as an Example." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/39595061660454475234.
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碩士國立雲林科技大學
工業工程與管理研究所碩士班
92
The government released 17 moulds Military Aircraft Maintenance to commission civil aerospace industry in order to execute practicably military aircraft for commercial maintenance. Due to the limited resource of maintenance management system, the difficulty to supervise the private companies and current problems of investment, skills, capital in government, the research is to offer the strategy based on Fuzzy Analytic Hierarchy Process (FAHP), fuzzy weighted and quantitative methods to solve the above issues. By application Fuzzy theory, Geometric method and Fuzzy Analytic Hierarchy Process (FAHP）to 9 mould military aircraft from 2 airlines, we can build up commercialization of military aircraft maintenance competitiveness and review perspectives to indicate fuzzy weighted and to develop 「The Fuzzy Competitiveness Comparison Model ling of Commercialization of Military Aircraft Maintenance in Domestic Aerospace Industry」in different Military Aircraft limited maintenance resources. The result shows great improvement with effective maintenance management in comparison to the current situation. In conclusion, fuzzy analytic hierarchy calculation is perfect for the case study.
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Ouerghi, Nesrine. "Modèle d'affaires et modèle d'entreprise." Mémoire, 2010. http://www.archipel.uqam.ca/2689/1/M11291.pdf.
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La complexité croissante des applications technologiques et scientifiques, le cycle de vie plus court des produits et la mondialisation des marchés imposent aux entreprises oeuvrant dans des industries de haute technologie de nouvelles pratiques comme l'ouverture et la collaboration. Le changement des structures et des modes opératoires des entreprises exige une révision des modèles d'affaires. Depuis le début des années 90, le courant de la recherche sur le modèle d'affaires s'est attaché à analyser ses fonctions et ses logiques. Les éléments clés constituants le modèle d'affaires sont: l'envergure de produits et de marché, une stratégie axée sur la différenciation, la clientèle cible, le réseau de valeur, les sources de création de valeur, l'organisation de la chaîne de valeur, les ressources stratégiques, les compétences et les ressources distinctives.
Néanmoins, nous avons identifié peu d'études qui s'intéressent particulièrement au test du modèle de l'innovation ouverte au secteur aéronautique. L'objet de notre recherche consistera donc à répondre à la question suivante:
« Comment les concepts d'innovation ouverte influencent-ils les logiques des modèles d'affaires des firmes, oeuvrant dans l'industrie aéronautique au Québec? » La démarche méthodologique se base sur une approche qualitative de type exploratoire. La stratégie de recherche a favorisé la réalisation d'une étude de cas d'un des maîtres d'oeuvre de l'industrie aéronautique au Québec, soit Pratt & Whitney Canada (P&WC). Ce choix a visé à expérimenter le cadre théorique développé dans la revue de littérature, pour répondre à notre question de recherche. Le modèle d'affaires de la compagnie a été analysé dans le but d'identifier le degré d'influence des concepts du modèle d'innovation ouverte sur les logiques du modèle d'affaires de la compagnie (logique expertise, logique client, logique réseau et logique génération de revenu). Pour ce faire, nous avons d'abord procédé à une étude documentaire, puis nous avons réalisé trois entrevues exploratoires auprès de hauts cadres ayant des connaissances sur les stratégies de développement du secteur aéronautique au Québec et des défis que l'industrie a relevé. Ces entrevues ont eu lieu à la Commission des Partenaires de Marché de Travail (qualification de main d'oeuvre en aérospatial) et la Comité sectorielle de Main d'oeuvre en Aérospatiale Québec (CAMAQ). Ensuite, sept entrevues ont été réalisées auprès des directeurs et hauts cadres de P&WC ayant une expertise en lien avec l'objet de notre étude. Les résultats de l'analyse nous permettent d'identifier les fonctions du modèle d'affaires de P&WC qui s'avère traduire une approche systémique conforme au six principales fonctions du modèle d'affaires. Il s'agit de la proposition de valeur, le segment de marché, la structure de la chaîne de valeur, la structure des coûts et les marges cibles, la position de l'entreprise dans le réseau de valeur, la stratégie concurrentielle. La conception et la mise en oeuvre des modèles d'affaires de P&WC (par conséquent les fonctions de ces derniers) sont guidées par les enjeux stratégiques préoccupant actuellement la compagnie, soit: la productivité et la création d'avantages concurrentiels. En outre, nous constatons que l'approche systémique se traduit dans les choix stratégiques du modèle d'affaires de P&WC.
L'influence des concepts du modèle d'innovation ouverte sur les logiques du modèle d'affaires de P&WC est importante durant les premières phases de maturité de la technologie. À ce stade, la collaboration touche à la recherche fondamentale et favorise le partage des investissements, des risques et de la recherche avec des partenaires. Toutefois, cet impact est moins considérable à des phases plus avancées de la maturité de la technologie. Une fois que la production atteint un stade avancé, le risque technologique diminue et le coût de développement augmente. La maturité de la technologie conduit à une augmentation du risque, de perte du contrôle sur l'utilisation des nouvelles technologies développées et une baisse des opportunités de collaboration. ______________________________________________________________________________ MOTS-CLÉS DE L’AUTEUR : Fonctions du modèle d'affaires, Logiques du modèle d'affaires, Création de valeur, Processus d'innovation, Commercialisation de l'innovation, Modèle d'innovation ouverte, Chaîne de valeur, Transfert du savoir, Aéronautique.
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Kalaitzis, Eleni Anna. "Job demands, job resources, safety behaviours, and burnout in air traffic management." Thesis, 2017. https://hdl.handle.net/10539/26045.
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A research report submitted to the Faculty of Humanities, University of the Witwatersrand, Johannesburg, in partial fulfilment of the requirements for the degree of Master of Arts (Organisational Psychology), 2017The aim of the present study was to utilise a mixed methods design as a means of investigating the relation between job demands, job resources, safety, and burnout in Air Traffic Management (ATM) technicians. It was also of interest to determine participants’ perspectives on the job demands and resources that may be present in their occupational environment, their participation in safety behaviours, and their perceptions regarding their work and safety performance. Non-probability, convenience sampling was employed to acquire the participants of the present research study. Participants included 33 ATM technicians (50.77% response rate) who took part in the quantitative component of the research study and 14 ATM who took part in the interview process. Participants’ ages ranged from 27 to 55 years (M = 38.91; SD = 8.76) and 90.1% were male (n = 30). Jackson and Rothmann’s (2005) original Job Demands-Resources Scale was used for the assessment of the job demands and resources sixteen items were also added to the original JDRS scale. Sixteen items were added to incorporate the possible job resources and demands experienced by ATM technicians, which were separated into the following sub-scales: shifts, weather conditions, travel, and equipment. Schaufeli, Leiter, Maslach, and Jackson’s (1996) Maslach Burnout Inventory-General Survey (MBIGS) was used to assess ATM technicians’ burnout. Safety behaviours were assessed through the integration of items found within two safety behaviour scales developed by Neal and Griffin (2006) and Hofmann and Morgeson (1999). A semi-structured interview process consisting of open-ended questions was used to discuss the following issues: job tasks, job demands, job resources, burnout, job safety, work-family spillover, and job performance. The findings depicted a weak, positive correlation between the perception of job demands and the experience of burnout (r = .376, p < .05) and a weak, negative correlation between the perception of job resources and the experience of burnout (r = -.383, p < .05). Job resources significantly predicted the experience of burnout (β = -.494, p = .002), as did job demands (β = .489, p = .003). A moderate, positive correlation between the perception of job resources and safety behaviours was obtained (r = .514, p < .01). The participants’ perceptions of job resources explained 26.5% of the variance in safety behaviours, (R2= .265, F(1, 31) = 11.16, p < 0.05. ATM technicians took part in the following safety behaviours: they consistently communicated with both management and air traffic controllers as a way of knowing exactly what the problem is before they went to a site, they took part in training programs as a means of keeping up to date with the latest technological knowledge, attended safety meetings, always communicated with management on how to increase safety, and made sure that a first aid kit was always available. ATM technician’s safety and performance appeared to be heavily influenced by their own personal understanding of the occupation’s risks, the weather conditions that take place on each specific site, the safety equipment that is worn, the knowledge of the possible repercussions that may arise from making any mistakes, and their own individual mood or disposition.
XL2018
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De, Montalk Ritchie James. "Developing proficiency in air transport pilots : the case for the introduction on non-technical skills in basic pilot training programmes : a thesis presented in partial fulfilment of the requirements for the degree of PhD Aviation at Massey University, Palmerston North." 2008. http://hdl.handle.net/10179/1460.
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This study examines the differences between the skills and competencies of New Zealand flight school graduates and the types of skills and competencies believed to define a proficient air transport pilot. In New Zealand the training of professional pilots is directed towards meeting the requirements laid down by the New Zealand Civil Aviation Authority for the licensing of professional pilots. However, some evidence suggests that competence for licensing purposes does not necessarily meet the requirements of the airlines and the types of skills that they require as a prerequisite to airline training. Although not clearly defined, this shortfall has been recognised for several decades and traditional thinking is that extra flying experience gained as a general aviation pilot will develop the skills necessary for entry into airline pilot training. The importance that pilots of differing experience levels attach to technical and non-technical skills and their perception of the training effectiveness of those skills and how deficiencies in those skills contributed to aircraft accidents was explored by a four stage study including: i) a review and analysis of flight test results obtained from graduate pilots on a university air transport pilot programme; ii) the analysis of responses to questionnaires supplied to three pilot groups within the New Zealand aviation industry; iii) the analysis of air transport aircraft accidents and their primary and contributing causes; and iv) interviews with qualified airline pilots working for New Zealand airlines. The results indicated that throughout the spectrum of experience and qualifications, from student pilot to airline pilot, the technical skill of aircraft handling was highly valued and the training in this skill was considered by all pilots to be satisfactory. In contrast, while non-technical skill deficiencies were found to be primary or contributing factors in many aircraft accidents, less importance was attached to non-technical skills by all pilot groups. The training effectiveness of these skills was rated as only moderately effective or of minimal effectiveness. The findings are discussed and recommendations are made for the improvement of basic flight training. In addition, a model is proposed for the fast tracking of flight school graduates into the airline training schools. Several areas for future research are also proposed.