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The Introduction of Robotic Technology: Perceptions of the Work Force of an Aerospace Defense Company

Description: This dissertation examines the effect that the introduction of an advanced manufacturing technology, specifically robotics, has on the work force of an aerospace defense company. In this endeavor, there are two main objectives. First, this study determines whether workers feel that their jobs are threatened by the introduction of robotic technology. Secondly, the research compares the degree to which workers from different labor types feel this threat. A review of the literature reveals that the technical factors involving manufacturing technology have been thoroughly examined and discussed, but the effect that they have on the work force has been somewhat neglected. This dissertation develops ten hypotheses to ascertain the perceived threat to job security for workers within an aerospace defense company. This study is based on an employee survey that examined the employee's perceived threat to job security by the introduction of robotics. The primary research was obtained from employees within an aerospace defense company through the use of questionnaires in a three phase approach. The first phase utilized a pretest that sampled the questionnaire prior to the company-wide solicitation. The second phase administered the questionnaire to the three labor types within the work force. Phase three consisted of data reduction and the comparison of the primary data to the research hypotheses. The results of the study concluded that workers closer to the robotic technology (hands-on employees) felt more threatened about their job security than workers more removed from the technology (support personnel and management). It was further found that the hands-on workers felt that the major factor that lead to the introduction of robots was the desire to lower labor costs while support personnel and managers felt that the major factor that lead to the introduction of robots was due to increasing productivity. Additional hypotheses tested in this study include ...
Date: August 1988
Creator: Rose, William B. (William Burford)
Partner: UNT Libraries

U.S. Aerospace Industry: Progress in Implementing Aerospace Commission Recommendations, and Remaining Challenges

Description: A letter report issued by the Government Accountability Office with an abstract that begins "The U.S. aerospace industry's wide-ranging activities--including commercial aviation, national security, and space exploration--make it critical to the economic health and strategic strength of our nation. However, the industry faces challenges, such as a national air traffic management system that, in its present form, cannot handle expected increases in demand; an aging aerospace workforce; and an increasingly competitive global market. In response to these and other challenges, Congress established the Commission on the Future of the United States Aerospace Industry in 2001 to recommend potential actions by the federal government and others to support a robust aerospace industry in the 21st century. In 2002, the Commission made recommendations to address these challenges. This report discusses (1) the extent to which federal agencies have addressed selected Commission recommendations and (2) the challenges that remain in addressing the recommendations. Based on the opinions of former Commissioners and GAO research, GAO selected recommendations dealing with the national airspace system, space policy, government-wide management structure, international issues, the aerospace workforce, and research and development. This report is based on reviews of agency documents, literature, and interviews with aerospace experts and officials from relevant federal agencies."
Date: September 13, 2006
Creator: United States. Government Accountability Office.
Partner: UNT Libraries Government Documents Department

Experimental Investigations of an Inclined Lap-Type Bolted Joint

Description: The dynamic response of critical aerospace components is often strongly dependent upon the dynamic behavior of bolted connections that attach the component to the surrounding structure. These bolted connections often provide the only structural load paths to the component. The bolted joint investigated in this report is an inclined lap-type joint with the interface inclined with respect to the line of action of the force acting on the joint. The accurate analytical modeling of these bolted connections is critical to the prediction of the response of the component to normal and high-level shock environmental loadings. In particular, it is necessary to understand and correctly model the energy dissipation (damping) of the bolted joint that is a nonlinear function of the forces acting on the joint. Experiments were designed and performed to isolate the dynamics of a single bolted connection of the component. Steady state sinusoidal and transient experiments were used to derive energy dissipation curves as a function of input force. Multiple assemblies of the bolted connection were also observed to evaluate the variability of the energy dissipation of the connection. These experiments provide insight into the complex behavior of this bolted joint to assist in the postulation and development of reduced order joint models to capture the important physics of the joint including stiffness and damping. The experiments are described and results presented that provide a basis for candidate joint model calibration and comparison.
Date: April 1, 2003
Creator: Gregory, Danny Lynn; Resor, Brian R.; Coleman, Ronald G. & Smallwood, David Ora
Partner: UNT Libraries Government Documents Department

Compact heat exchangers for condensation applications: Yesterday, today and tomorrow

Description: Compact heat exchangers are being increasingly considered for condensation applications in the process, cryogenic, aerospace, power and refrigeration industries. In this paper, different configurations available for condensation applications are analyzed and the current state-of-the-knowledge for the design of compact condensers is evaluated. The key technical issues for the design and development of compact heat exchangers for condensation applications are analyzed and major advantages are identified. The experimental data and performance prediction methods reported in the literature are analyzed to evaluate the present design capabilities for different compact heat-exchanger configurations. The design flexibility is evaluated for the development of new condensation applications, including integration with other process equipment.
Date: July 1, 1993
Creator: Panchal, C. B.
Partner: UNT Libraries Government Documents Department

Final Technical Report

Description: In the fiscal years 2003 through 2006, the LMU-IAC conducted 76 industrial assessments with 595 assessment recommendations, with 382 recommendations implemented, with practically all plant types and sizes, extending in geographical location from about 250 miles north of LMU-IAC to 50 miles south and 90 miles east. Plant sizes varied from one building of 30,000 sq ft to 17 buildings of 1.5 million sq ft. The amount of energy savings identified was worth about $34,303,699. Because of the national level Lean Productivity programs at the university, LMU-IAC is unique in its expertise of the impact of Lean productivity on energy savings, which is huge, far exceeding the energy savings from the equipment improvements. Besides energy savings, LMU-IAC promoted the good name of the program and DOE in the local industry, utilities, trade organizations, the vast aerospace industry, educational institutions, and the public. The IAC work resulted in numerous public lectures, a chapter in the Encyclopedia of Industrial Energy, and several journal articles. 37 students, including 8 graduate students have been trained and issued DOE IAC Certificates. Several of them found work as energy experts.
Date: February 27, 2007
Creator: Oppenheim, Bohdan W.
Partner: UNT Libraries Government Documents Department

Design and Application of an Electronic Logbook for Space System Integration and Test Operations

Description: In the highly technological aerospace world paper is still widely used to document space system integration and test (I&T) operations. E-Logbook is a new technology designed to substitute the most commonly used paper logbooks in space system I&T, such as the connector mate/demate logbook, the flight hardware and flight software component installation logbook, the material mix record logbook and the electronic ground support equipment validation logbook. It also includes new logbook concepts, such as the shift logbook, which optimizes management oversight and the shift hand-over process, and the configuration logbook, which instantly reports on the global I&T state of the space system before major test events or project reviews. The design of E-Logbook focuses not only on a reliable and efficient relational database, but also on an ergonomic human-computer interactive (HCI) system that can help reduce human error and improve I&T management and oversight overall. E-Logbook has been used for the I&T operation of the Gamma-ray Large Area Space Telescope (GLAST) Large Area Telescope (LAT) at the Stanford Linear Accelerator Center (SLAC). More than 41,000 records have been created for the different I&T logbooks, with no data having been corrupted or critically lost. 94% of the operators and 100% of the management exposed to E-Logbook prefer it to paper logbooks and recommend its use in the aerospace industry.
Date: October 10, 2006
Creator: Kavelaars, Alicia T. & /SLAC /Stanford U., Dept. Aeronaut. Astronaut.
Partner: UNT Libraries Government Documents Department

Innovative forming and fabrication technologies : new opportunities.

Description: The advent of light metal alloys and advanced materials (polymer, composites, etc.) have brought the possibility of achieving important energy reductions into the full life cycle of these materials, especially in transportation applications. 1 These materials have gained acceptance in the aerospace industry but use of light metal alloys needs to gain wider acceptance in other commercial transportation areas. Among the main reasons for the relatively low use of these materials are the lack of manufacturability, insufficient mechanical properties, and increased material costs due to processing inefficiencies. Considering the enormous potential energy savings associated with the use of light metal alloys and advanced materials in transportation, there is a need to identify R&D opportunities in the fields of materials fabrication and forming aimed at developing materials with high specific mechanical properties combined with energy efficient processes and good manufacturability. This report presents a literature review of the most recent developments in the areas of fabrication and metal forming focusing principally on aluminum alloys. In the first section of the document, the different sheet manufacturing technologies including direct chill (DC) casting and rolling, spray forming, spray rolling, thin slab, and strip casting are reviewed. The second section of the document presents recent research on advanced forming processes. The various forming processes reviewed are: superplastic forming, electromagnetic forming, age forming, warm forming, hydroforming, and incremental forming. Optimization of conventional forming processes is also discussed. Potentially interesting light metal alloys for high structural efficiency including aluminum-scandium, aluminum-lithium, magnesium, titanium, and amorphous metal alloys are also reviewed. This section concludes with a discussion on alloy development for manufacturability. The third section of the document reviews the latest developments in fiber-reinforced composite materials. Emerging curing processes are presented along with a discussion on the possible developments in biocomposite materials. The fourth section presents recent developments ...
Date: January 31, 2008
Creator: Davis, B.; Hryn, J.; Systems, Energy & Kingston Process Metallurgy, Inc.
Partner: UNT Libraries Government Documents Department

Geant4 Applications in Space

Description: Use of Geant4 is rapidly expanding in space application domain. I try to overview three major application areas of Geant4 in space, which are apparatus simulation for pre-launch design and post-launch analysis, planetary scale simulation for radiation spectra and surface and sub-surface explorations, and micro-dosimetry simulation for single event study and radiation-hardening of semiconductor devices. Recently, not only the mission dependent applications but also various multi-purpose or common tools built on top of Geant4 are also widely available. I overview some of such tools as well. The Geant4 Collaboration identifies that the space applications are now one of the major driving forces of the further developments and refinements of Geant4 toolkit. Highlights of such developments are introduced.
Date: November 7, 2007
Creator: Asai, M.
Partner: UNT Libraries Government Documents Department

Rocketdyne Division annual site environmental report Santa Susana Field Laboratory and Desoto sites 1995

Description: This annual report discusses environmental monitoring at two manufacturing and test operations sites operated in the Los Angeles area by the Rocketdyne Division of Rockwell International Corporation (Rocketdyne). These are identified as the Santa Susana Field Laboratory (SSFL) and the DeSoto site. The sites have been used for manufacturing, R&D, engineering, and testing in a broad range of technical fields, primarily rocket engine propulsion and nuclear reactor technology. The DeSoto site essentially comprises office space and light industry with no remaining radiological operations, and has little potential impact on the environment. The SSFL site, because of its large size (2,668 acres), warrants comprehensive monitoring to assure protection of the environment. SSFL consists of four administrative areas used for research, development, and test operations as well as a buffer zone. A portion of Area I and all of Area II are owned by the U.S. Government and assigned to the National Aeronautics and Space Administration (NASA). A portion of Area IV is under option for purchase by the Department of Energy (DOE).
Date: July 30, 1996
Partner: UNT Libraries Government Documents Department

Commercialization plan laser-based decoating systems

Description: F2 Associates Inc. (F2) is a small, high-technology firm focused on developing and commercializing environmentally friendly laser ablation systems for industrial-rate removal of surface coatings from metals, concrete, and delicate substrates such as composites. F2 has a contract with the US Department of Energy Federal Energy Technology Center (FETC) to develop and test a laser-based technology for removing contaminated paint and other contaminants from concrete and metal surfaces. Task 4.1 in Phase 2 of the Statement of Work for this DOE contract requires that F2 ``document its plans for commercializing and marketing the stationary laser ablation system. This document shall include a discussion of prospects for commercial customers and partners and may require periodic update to reflect changing strategy. This document shall be submitted to the DOE for review.`` This report is being prepared and submitted in fulfillment of that requirement. This report describes the laser-based technology for cleaning and coatings removal, the types of laser-based systems that have been developed by F2 based on this technology, and the various markets that are emerging for this technology. F2`s commercialization and marketing plans are described, including how F2`s organization is structured to meet the needs of technology commercialization, F2`s strategy and marketing approach, and the necessary steps to receive certification for removing paint from aircraft and DOE certification for D and D applications. The future use of the equipment built for the DOE contract is also discussed.
Date: January 1, 1998
Creator: Freiwald, J. & Freiwald, D.A.
Partner: UNT Libraries Government Documents Department

Roughening and removal of surface contamination from beryllium using negative transferred-arc cleaning

Description: Negative transferred-arc (TA) cleaning has been used extensively in the aerospace industry to clean and prepare surfaces prior to plasma spraying of thermal barrier coatings. This non-line of sight process can improve the bond strength of plasma sprayed coatings to the substrate material by cleaning and macroscopically roughening the surface. A variation of this cleaning methodology is also used in gas tungsten arc (GTA) welding to cathodically clean the surfaces of aluminum and magnesium prior to welding. Investigations are currently being performed to quantify the degree in which the negative transferred-arc process can clean and roughen metal surfaces. Preliminary information will be reported on the influence of processing conditions on roughening and the removal of carbon and other contaminates from the surface of beryllium. Optical, spectral and electrical methods to quantify cleaning of the surface will also be discussed. Applications for this technology include chemical-free precision cleaning of beryllium components.
Date: December 1, 1997
Creator: Castro, R.G.; Hollis, K.J. & Elliott, K.E.
Partner: UNT Libraries Government Documents Department

Development of components for waste management systems using aerospace technology

Description: An aerospace fluid management technology called ``platelets`` has been applied to components that are critical to the economic operation of waste management systems. Platelet devices are made by diffusion bonding thin metal plates which have been etched with precise flow passage circuitry to control and meter fluid to desired locations. Supercritical water oxidation (SCWO) is a promising waste treatment technology for safe and environmentally acceptable destruction of hazardous wastes. Performance and economics of current SCWO systems are limited by severe salt deposition on and corrosion of the reactor walls. A platelet transpiring-wall reactor has been developed that provides a protective layer of water adjacent to the reactor walls which prevents salt deposition and corrosion. Plasma arc processing is being considered as a method for stabilizing mixed radioactive wastes. Plasma arc torch systems currently require frequent shutdown to replace failed electrodes and this increases operating costs. A platelet electrode design was developed that has more than 10 times the life of conventional electrodes. It has water cooling channels internal to the electrode wall and slots through the wall for injecting gas into the arc.
Date: September 1995
Creator: Rousar, D.; Young, M. & Sieger, A.
Partner: UNT Libraries Government Documents Department

A Regularized Galerkin Boundary Element Method (RGBEM) for Simulating Potential Flow About Zero Thickness Bodies

Description: The prediction of potential flow about zero thickness membranes by the boundary element method constitutes an integral component of the Lagrangian vortex-boundary element simulation of flow about parachutes. To this end, the vortex loop (or the panel) method has been used, for some time now, in the aerospace industry with relative success [1, 2]. Vortex loops (with constant circulation) are equivalent to boundary elements with piecewise constant variation of the potential jump. In this case, extending the analysis in [3], the near field potential velocity evaluations can be shown to be {Omicron}(1). The accurate evaluation of the potential velocity field very near the parachute surface is particularly critical to the overall accuracy and stability of the vortex-boundary element simulations. As we will demonstrate in Section 3, the boundary integral singularities, which arise due to the application of low order boundary elements, may lead to severely spiked potential velocities at vortex element centers that are near the boundary. The spikes in turn cause the erratic motion of the vortex elements, and the eventual loss of smoothness of the vorticity field and possible numerical blow up. In light of the arguments above, the application of boundary elements with (at least) a linear variation of the potential jump--or, equivalently, piecewise constant vortex sheets--would appear to be more appropriate for vortex-boundary element simulations. For this case, two strategies are possible for obtaining the potential flow field. The first option is to solve the integral equations for the (unknown) strengths of the surface vortex sheets. As we will discuss in Section 2.1, the challenge in this case is to devise a consistent system of equations that imposes the solenoidality of the locally 2-D vortex sheets. The second approach is to solve for the unknown potential jump distribution. In this case, for commonly used C{sup o} ...
Date: October 1, 1999
Creator: GHARAKHANI,ADRIN & WOLFE,WALTER P.
Partner: UNT Libraries Government Documents Department

[News Clip: Lockheed]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, covering a news story. This story aired at 10pm.
Date: March 17, 1993, 10:00 p.m.
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[News Clip: GD-Lockheed]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, covering a news story. This story aired at 6pm.
Date: March 17, 1993, 6:00 p.m.
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

[News Clip: GD FOLO]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 5 P.M.
Date: December 20, 1992
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Partner: UNT Libraries Special Collections

Neutron and x-ray scattering studies of the metallurgical condition and residual stresses in Weldalite welds

Description: Weldalite is a lithium-containing aluminum alloy which is being considered for aerospace applications because its favorable strength-to-weight ratio. Successful welding of this alloy depends on the control of the metallurgical condition and residual stresses in the heat affected zone. Neutron and x-ray scattering methods of residual stress measurement were applied to plasma arc welds made in aluminum-lithium alloy test panels as part of an evaluation of materials for use in welded structures. In the course of these studies discrepancies between x-ray and neutron results from the heat affected zone (HAZ) of the weld were found. Texture changes and recovery from the cold work, indicated in peak widths, were found in the HAZ as well. The consideration of x-ray and neutron results leads to the conclusion that there is a change in solute composition which modifies the d-spacings in the HAZ which affects the neutron diffraction determination of residual stresses. The composition changes give the appearance of significant compressive strains in the HAZ. This effect and sharp gradients in the texture give severe anomalies in the neutron measurement of residual stress. The use of combined x-ray and neutron techniques and the solution to the minimizing of the neutron diffraction anomalies are discussed.
Date: December 31, 1995
Creator: Spooner, S. & Pardue, E.B.S.
Partner: UNT Libraries Government Documents Department

CFCC working group meeting: Proceedings

Description: The theme of the meeting was ``A Path to Commercialization`` and discussion was devoted to addressing the nearest-term products and the time frame for implementation. The objectives of the meeting were to identify the barriers to commercialization, methods to overcome these barriers, and the actions required to achieve success. The meeting was planned to bring together government agencies and industry customers and, suppliers to discuss and conclude where the CFCC Program is today, where it is going, and how they plan to get there. It was also planned to join component developers with end users who can describe systems needs and projected schedules for introducing CFCC components in industrial applications.
Date: December 31, 1995
Partner: UNT Libraries Government Documents Department

Characteristics of a multicomponent Nb-Ti-Al alloy via industrial-scale practice

Description: Within the spectrum of advanced intermetallic materials, an alloy containing 44Nb-35Ti-6Al-5Cr-8V-1W-0.5Mo-0.3Hf (at. %) was investigated in the industrial-scale produced condition. The alloy was tensile tested in air from room temperature to 1,000 C and in vacuum at 750 and 850 C. Results of this study have shown that the alloy can be commercially produced and has adequate ductility for its secondary processing even at an oxygen level of 1,160 wppm. The alloy has room temperature ductility of 16% and superplastic elongation of 244% at 1,000 C. This alloy shows low intermediate temperature (600--850 C) ductility when tested in air. The vacuum testing revealed that the low ductility is associated within oxygen embrittlement phenomenon. It is expected that such an embrittlement can be taken care of by an oxidation resistant coating. The alloy also possesses superior strength to similar alloys in this class. Results of this investigation suggest a strong potential for consideration of this alloy to exceed the useful temperature range of nickel-base superalloys.
Date: May 1, 1997
Creator: Sikka, V.K. & Loria, E.A.
Partner: UNT Libraries Government Documents Department

A water infiltration model: Study of reusability in an environmental engineering problem

Description: The paper describes a computer simulation, involving a site characterization for the storage of low-level radioactive waste at the Nevada Test Site, in order to highlight the reutilization in that project of skills and tools used in aerospace computing.
Date: March 1, 1995
Creator: Cawlfield, D.E.; Lindstrom, F.T. & Miel, G.J.
Partner: UNT Libraries Government Documents Department

SIAM symposium on control problems in industry

Description: This symposium focused on industrial control applications that have benefited from recent mathematical and technological developments. The themes featured included: applications of control techniques in aerospace industry, automotive industry, environmental sciences, manufacturing processes, and petroleum industry; optimal shape design in aerospace applications; optimal design of micro-optics; robust control and H-infinity methods.
Date: December 31, 1994
Partner: UNT Libraries Government Documents Department

Surface Inspection Machine Infrared (SIMIR). Final CRADA report

Description: This Cooperative Research and Development Agreement was a one year effort to make the surface inspection machine based on diffuse reflectance infrared spectroscopy (Surface Inspection Machine-Infrared, SIMIR), being developed by Surface Optics Corporation, perform to its highest potential as a practical, portable surface inspection machine. The design function of the SIMIR is to inspect metal surfaces for cleanliness (stains). The system is also capable of evaluating graphite-resin systems for cure and heat damage, and for measuring the effects of moisture exposure on lithium hydride, corrosion on uranium metal, and the constituents of and contamination on wood, paper, and fabrics. Over the period of the CRADA, extensive experience with the use of the SIMIR for surface cleanliness measurements have been achieved through collaborations with NASA and the Army. The SIMIR was made available to the AMTEX CRADA for Finish on Yarn where it made a very significant contribution. The SIMIR was the foundation of a Forest Products CRADA that was developed over the time interval of this CRADA. Surface Optics Corporation and the SIMIR have been introduced to the chemical spectroscopy on-line analysis market and have made staffing additions and arrangements for international marketing of the SIMIR as an on-line surface inspection device. LMES has been introduced to a wide range of aerospace applications, the research and fabrication skills of Surface Optics Corporation, has gained extensive experience in the areas of surface cleanliness from collaborations with NASA and the Army, and an extensive introduction to the textile and forest products industries. The SIMIR, marketed as the SOC-400, has filled an important new technology need in the DOE-DP Enhanced Surveillance Program with instruments delivered to or on order by LMES, LANL, LLNL, and Pantex, where extensive collaborations are underway to implement and improve this technology.
Date: February 28, 1997
Creator: Powell, G.L.; Neu, J.T. & Beecroft, M.
Partner: UNT Libraries Government Documents Department

Very large assemblies: Optimizing for automatic generation of assembly sequences

Description: Sandia's Archimedes 3.0{copyright} Automated Assembly Analysis System has been applied successfully to several large industrial and weapon assemblies. These have included Sandia assemblies such as portions of the B61 bomb, and assemblies from external customers such as Cummins Engine Inc., Raytheon (formerly Hughes) Missile Systems and Sikorsky Aircraft. While Archimedes 3.0{copyright} represents the state-of-the-art in automated assembly planning software, applications of the software made prior to the technological advancements presented here showed several limitations of the system, and identified the need for extensive modifications to support practical analysis of assemblies with several hundred to a few thousand parts. It was believed that there was substantial potential for enhancing Archimedes 3.0{copyright} to routinely handle much larger models and/or to handle more modestly sized assemblies more efficiently. Such a mature assembly analysis capability was needed to support routine application to industrial assemblies that overstressed the system, such as full nuclear weapon assemblies or full-scale aerospace or military vehicles.
Date: February 1, 2000
Creator: CALTON,TERRI L.
Partner: UNT Libraries Government Documents Department