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Daniel Guggenheim School of Aerospace Engineering
Daniel Guggenheim School of Aerospace Engineering
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ItemExpectations and Needs for Interaction in Human Robot Interaction(Georgia Institute of Technology, 2023-11-29) Feigh, Karen M.
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ItemSky Walking: An Astronaut's Journey(Georgia Institute of Technology, 2020-01-16) Jones, Thomas D.Four-time space traveler Tom Jones shares the personal and spiritual experience of space exploration. You’ll rocket through a rumbling blast-off, soar into orbit, spacewalk at the Space Station, endure a fiery reentry, and return, exhilarated, to Earth.
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ItemEverything I Needed to be Successful I Learned in Kindergarten(Georgia Institute of Technology, 2014-04-02) Magnus, Sandra
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ItemThe Space Shuttle and I(Georgia Institute of Technology, 2014-02-06) Crippen, Robert L.The Space Shuttle consumed a major portion of my life, nearly thirty years. I was there at the beginning when we were defining crew requirements. That included the computer requirements, cockpit controls and displays, and procedure development Flying the Shuttle was a rewarding experience after years of being involved in the development. STS-1, 7, 41C, & 41G had me involved in most of the early test flights. The Challenger accident was a terrible tragedy which provided major lessons learned. It led me to move into management to return the Shuttle to flight. Eventually I left NASA and ended up running the company that was the direct cause of the accident, Thiokol. The Space Shuttle was a great program with 135 flights, but with two terrible accidents. I am proud to have played a role in its development and operation
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ItemWhat does the future bring? A look at Technologies for Commercial Aircraft in the years 2035 to 2050(Georgia Institute of Technology, 2014-01-23) Benzakein, MeyerDemographics and economics in the next 20 years are being examined. They reflect a significant GDP growth and with this a strong demand for commercial aircraft not only in the US and Europe but across Asia and the Middle East. The demand will focus on more fuel efficient and more environmentally friendly vehicles. Significant progress is being made with the new regionals, narrow-body, and wide-body aircraft between now and the year 2020. Looking beyond, the world will examine new airplane architectures, new changes in propulsion systems, and higher thermal and propulsion efficiencies. Distributed propulsion options will come into play. With them, higher operating pressure gas generators will be developed and great attention will have to be given to highly integrated propulsion/airplane systems. Energy transfer requirements will lead to bigger gear systems as well as new hybrid systems. The new machines are forecasted to offer improvements in fuel efficiencies of over 40%. A terrific achievement. There are many technical challenges to make all these things happen. The aerospace engineers and scientists of today and tomorrow face unlimited opportunities to make a difference for what looks like a very exciting future.
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ItemDisruption and Vaporization of Simulated Fuel Droplets under Locally Supersonic Conditions(Georgia Institute of Technology, 2013-03-07) Hermanson, James C.The disruption of droplets under supersonic conditions was studied in a draw-down supersonic wind tunnel. The test liquids included 2-propanol, tetraethylene glycol dimethyl ether, and a hexanol-pentane 50/50 mixture by volume. The hexanol-pentane mixture has similar physical properties to 2-propanol, but a considerably higher vapor pressure. The droplets were accelerated in the supersonic flow, achieving supersonic velocities relative to the surrounding air. The droplets reached a relative Mach number of as high as 1.8 and Weber number of 320. The droplets were imaged by direct close-up single-and multiple-exposure imaging and by Laser-Induced Fluoresecence (LIF) imaging. The low static pressure in the supersonic stream had the potential to give rise to superheating of the droplet fluid as the local static pressure became significanlty lower than the vapor pressure of the droplet liquid, depending on the test liquid employed. Droplet lifetimes for the more volatile hexanol/pentane mixture appeared to be shorter due to accelerated vaporization consistent with superheating, though little impact was observed on the droplet velocity and relative Mach number. LIF imaging of the expelled vapor indicated that the more volatile liquid droplets had a higher vaporization rate than non-volatile droplets at all downstream locations, suggesting that droplet superheating does play some role in accelerating the vaporization of supersonic droplets under these conditions.
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ItemInventing the F-35 Joint Strike Fighter(Georgia Institute of Technology, 2012-12-06) Bevilaqua, PaulDuring the first century of flight, the focus of aerospace education has been on the methods of predicting lift and drag, with cost and schedule as dependent variables. Consequently, our engineers are very good at predicting performance, and aviation is one of the few areas where America sill has a favorable balance of trade. But America is facing new challenges as it works to adapt to the changing economy, energy, environmental and security demands of our nation. The mechanism for addressing these challenges during the next century of flight will be to focus education on achieving technical innovation with cost and schedule as independent variables and real constraints. This presentation will describe the development of the F-35 Joint Strike Fighter, which illustrates how technical innovation and a Lean approach to aircraft design can assure continued aviation leadership in this next century of flight. The technical innovation involves designing three highly common, but identical, variants of the same aircraft, incorporating a novel turboshaft cycle for vertical takeoff and landing. The principles of Lean Manufacturing were applied to the design process in order to control cost and schedule. The Collier Trophy, which each year recognizes “the greatest achievement in aeronautics or astronautics in America” was awarded to the development team for these accomplishments.
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ItemThe Manned UAV: Where is the Revolution Headed(Georgia Institute of Technology, 2012-11-30) Langford, John S.Where is the UAV revolution headed? One possibility is that it's not about manned versus unmanned, but about degrees of autonomy. Highly automated systems will put a wide range of new aircraft types into the National Airspace System, controlled by operators with a wide range of skills and experience. A step on this road is the "optionally piloted aircraft", some of which are flying today. This talk will review recent progress in unmanned air vehicles, examine some of the challenges of integrating robotic systems in the NAS, and explore the future potential of OPAs.
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ItemHandling Qualities Engineering(Georgia Institute of Technology, 2012-10-17) Padfield, Gareth D.This Nikolsky paper on rotorcraft handling qualities has been written under the enduring influence of a community of very dedicated engineers and pilots. The author looks back nearly 70 years and highlights particular events that reflect the continual growth of the handling qualities discipline and brought us to where we are in 2012. We at a point where designers have, within their grasp, the performance standards, criteria and test techniques, the understanding of rotorcraft aeromechanics and control and the design tools to ensure that handling deficiencies never again have to define the boundary of the operational flight envelope. The tension between flight performance and flight safety is properly managed by ensuring that Level 1 handling qualities are there for pilots throughout missions, including degraded environments and hazardous operations. This paper tells the story of how our industry has arrived at this point. Looking forward, we now need to strive for super-Level 1 handling quality, a state where pilot errors, in any shape or form attributable to deficient flight characteristics, are things of the past. The presentation takes the form of a narrative, describing the story of the idea that HQs can be quantified. During the first few years of the 20th century, the Wright brothers had carefully and thoroughly documented developments with their 1901-2 gliders to their 1903-5 powered aircraft. In contrast, no such recordings are available of the flight behavior of rotary wing aircraft in the 1920-30s. The story therefore begins with the post-war work in the UK and US research laboratories to understand better helicopter flight characteristics and the emergence of the first rotorcraft handling qualities requirements specification. The story then unfolds largely based on documents in the public domain written by engineers and pilots from European and North American industry, research laboratories and academia. This version of the story is also restricted to the single main rotor, “penny-farthing” configuration.
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ItemDamping Models for Shear Beams With Applications to Spacecraft Wiring Harnesses(Georgia Institute of Technology, 2012-09-20) Lesieutre, George A.Damping is an important aspect of aerospace sturctures designed to operate in dynamic environments. Wiring harnesses can significantly affect the dynamics of spacecraft structures. High-fidelity models of the coupled structure-cable dynamic system are needed to accurately predict launch loads and potential control system interactions. A beam model including first-order transverse shear can accurately capture the effects of cable mass and stiffness on dynamic response and provide insight into structural behavior. However, available time-domain damping models are inadequate for use in such a model- common proportional damping models predict modal damping that depends strongly and unrealistically on frequency. Inspired by a geometirc rotation-based viscous damping model that provides frequency-independent modal damping in an Euler-Bernoulli beam model, several time-domain viscous damping models are presented that exhibit weaker frequency dependence than proportional damping models. At low frequencies (bendingdominated modes), the models provide modal damping that is either directly or inversely proportional to the mode number. Model predictions compare favorably to available experimental data.