Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 23 for “"aircraft manufacturing"”.
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Evaluation of ergonomic interventions for bucking bars in aircraft manufacturing
Steel bucking bars used in sheet metal assembly tasks lack application of ergonomic principles. Four bucking bar interventions were evaluated and compared to a steel bucking bar. The interventions included a tungsten bucking bar, Viscolas® rubber wrap adhered to a steel bucking bar, a steel bar …
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Design, optimization, and performance of an adaptable aircraft manufacturing architecture
The cost and time required to develop aircraft have grown strongly over time, to the point where aircraft have become prohibitively expensive and are outpaced by ever-evolving mission needs. To address this problem, this thesis presents and explores an aircraft platform architecture called …
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Reduction of variability in aircraft manufacturing using photogrammetry as an inspection tool
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, and (M.S.)--Massachusetts Institute of Technology, Sloan School of Management, 1992.
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Triple Scissor Extender : A 6-DOF lifting and positioning robot for autonomous aircraft manufacturing
This thesis presents the Triple Scissor Extender (TSE), a novel 6-DOF robotic mechanism for reaching high ceilings and positioning an end-effector. The end-effector is supported with three scissor mechanisms that extend towards the ceiling with 6 independent linear actuators moving the base ends of …
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Design of multifunctional paired robots engaged across a thin plate for aircraft manufacturing and maintenance
The aircraft industry lacks an automated system for wing box manufacturing and maintenance. Currently workers assemble and inspect thousands of fasteners in the wing structure by hand. This manufacturing process consumes valuable time and resources. Mobile robots capable of navigating on the …
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Evaluation of control systems for automated aircraft wing manufacturing
The Boeing Company is looking to bring aircraft manufacturing technology into the 21st century. As part of this process, several projects have been started to develop the technologies required to achieve Boeing's vision for the future of aircraft manufacturing. To date, much of this work has …
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Stability and progress in the aircraft industry : an inquiry into the factors, favorable and unfavorable, to stability and progress
… factors for study in an economic analysis of the aircraft manufacturing industry. Stability of an industry of such critical importance reduces the extreme dislocations associated with a free enterprise economy during business cycle fluctuations. Stability contributed to the maintenance of a high …
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Supernumerary robotic limbs : biomechanical analysis and human-robot coordination Training
As the workforce within manufacturing grows older, especially within aircraft manufacturing, the need for new technologies to assist workers arises. If a technology could offer improvements to an aircraft manufacturing laborer's efficiency, as well as reduce the load on his body, it could …
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Mass-customization in commercial real estate : how the aviation industry can help us create beautiful buildings that add value
… and the progress of computer-controlled manufacturing machines. However, the promise held by these technologies has not been fulfilled. While mass-customization is implemented in projects with large budgets, they are rarely employed in mainstream real estate. This thesis examines two …
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Design, construction and characterization of a wind tunnel
… is the most fundamental test equipment for aircraft testing and studying aerodynamics. Because of the complexity of the test-subject's geometry, it is difficult to study the aerodynamic pattern simply based on theoretical calculations. Most of the aerodynamics experiments still use wind …
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A life-cycle flexibility framework for designing, evaluating and managing "complex" real options : case studies in urban transportation and aircraft systems
… the LCF Framework: 1) a large blended wing body aircraft in a commercial aircraft manufacturing enterprise and, 2) Intelligent Transportation System (ITS) capabilities in an urban region with multiple public and private stakeholders. For the case studies, both a quantitative and qualitative …
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Design of a fail-safe wearable robot with novel extendable arms for ergonomic accommodation during floor work
Aircraft manufacturing, construction, and agricultural production often involve workers maintaining uncomfortable postures, such as stooping and kneeling, for extended periods of time. We present a wearable robot, named MantisBot Alpha, that consists of two expandable robotic arms that brace a …
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Design of an instrumented workpart for robotic aircraft wing-box assembly
The idea of an underactuated robotic arm used in aircraft wing assembly and production was created to improve the wing-box assembly process. In order to display the robots capabilities and areas of improvement, a suitable testing device would be most helpful. This project attempts to achieve an …
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Performing overhead tasks with supernumerary robotic limbs
Overhead tasks such as those frequently found in aircraft manufacturing pose health risks to the workers due to the strain imposed on the shoulders. To reduce the risk of injury, a set of supernumerary robotic limbs (SRL) were designed to perform these overhead tasks. The SRL is designed with …
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Mitigating the risk of a new workforce by reducing rework and rightsizing on hand inventory
… pace to support accelerated product demand in an aircraft manufacturing facility in a short amount of time resulted in: (1) increased rework, and (2) increased part damage during assembly. The majority of rework results from simple workmanship mistakes from the new workforce. The approach used in …
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International trade policy, oligopoly and learning-by-doing (with applications to the international aircraft industry)
… under duopoly. Fourth, I examine the civil aircraft manufacturing industry which has a very close market structure discussed in this paper using two different approaches: a general descriptive case study of the industry and an empirical evaluation of its performance in the past twenty years.
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Re-Innovation Nation: The Strategic and Political Logic of Technology Transfer Policy in Rising China
… industries, including high-speed rail, aircraft manufacturing, and renewable energy technology. At the same time, it used them sparingly in others, such as battery technology, precision measurement equipment, and semiconductor design and fabrication. What explains variation in China’s …
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