John Livingston - Academia.edu (original) (raw)
Uploads
Papers by John Livingston
48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, 2010
Historically, decisions made during early phases of systems design and acquisition determine the ... more Historically, decisions made during early phases of systems design and acquisition determine the majority of the life-cycle costs for those systems. Physics-based, high fidelity models that can support rapid analysis (minutes to hours) and rapid design (hours to days) would improve the quality of early acquisition decisions. The DaVinci software product is being developed in direct response to these needs. DaVinci is designed around a unified lifecycle engineering model encompassing multi-fidelity analysis for a wide range of applications. At its core, DaVinci provides next generation modeling capability for functional analysis, alternative design evaluation, trade-space exploration, and acquisition planning. The DaVinci infrastructure and architecture will enable a collaborative environment for all aspects of early acquisition processes and provide a much more effective mechanism for transferring detailed models and product descriptions between phases of acquisition throughout the life of the program. DaVinci will couple a rich graphical user interface with pre-engineered system components and large scale computing to allow systems engineers and acquisition stakeholders the use of computationally based engineering to enable rapid system engineering development iterations for requirements traceability, physics-based systems representations, and the creation of high-fidelity models suitable for early preliminary design.
Space 2006, 2006
This study compares the developmental, production, and maintenance costs (DPM) of two-stage-to-or... more This study compares the developmental, production, and maintenance costs (DPM) of two-stage-to-orbit (TSTO) expendable (ELV), hybrid (HLV), and reusable (RLV) launch systems. This comparison was accomplished using top level mass and cost estimating relations (MERs, CERs). Mass estimating relationships were correlated to existing launch system data and ongoing launch system studies. Cost estimating relations were derived from Dr. Dietrich Koelle's "Handbook of Cost Engineering for Space Transportation Systems". Hybrid launch vehicles appear to be preferable if current or modest increases in launch rates are projected while reusable launch vehicles appear preferable for large projected increases in launch rates. v Acknowledgments I would like to thank everyone who made it possible for me to complete this graduate thesis. First, I would like to convey gratitude to Dr. Milton Franke, my graduate advisor, for guiding me through the thesis process. His teachings in Rocket Propulsion were instrumental in completing this project. Secondly, I would like to offer thanks to John Livingston from ASC/XREC. His mentoring and expertise in rocket design made it possible for me to get started, let alone complete my research. I would also like to thank the rest of the individuals who assisted me during my research. They include, Mike
Space 2004 Conference and Exhibit, 2004
15th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2008
This paper presents the results of numerous space launch vehicle studies which include both horiz... more This paper presents the results of numerous space launch vehicle studies which include both horizontal and vertical launch systems. It was found that horizontal launch vehicles faired poorly when compared with vertical launch systems in almost all measures of performance. Measures of performance included gross weight, empty weight, wetted area, cost, risk, maintenance, and turn time. Ever effort was made to fairly evaluate all designs with consistent methodology. The reasons for the horizontal launch vehicles’ poor showing are explained and quantified.
48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, 2010
Historically, decisions made during early phases of systems design and acquisition determine the ... more Historically, decisions made during early phases of systems design and acquisition determine the majority of the life-cycle costs for those systems. Physics-based, high fidelity models that can support rapid analysis (minutes to hours) and rapid design (hours to days) would improve the quality of early acquisition decisions. The DaVinci software product is being developed in direct response to these needs. DaVinci is designed around a unified lifecycle engineering model encompassing multi-fidelity analysis for a wide range of applications. At its core, DaVinci provides next generation modeling capability for functional analysis, alternative design evaluation, trade-space exploration, and acquisition planning. The DaVinci infrastructure and architecture will enable a collaborative environment for all aspects of early acquisition processes and provide a much more effective mechanism for transferring detailed models and product descriptions between phases of acquisition throughout the life of the program. DaVinci will couple a rich graphical user interface with pre-engineered system components and large scale computing to allow systems engineers and acquisition stakeholders the use of computationally based engineering to enable rapid system engineering development iterations for requirements traceability, physics-based systems representations, and the creation of high-fidelity models suitable for early preliminary design.
Space 2006, 2006
This study compares the developmental, production, and maintenance costs (DPM) of two-stage-to-or... more This study compares the developmental, production, and maintenance costs (DPM) of two-stage-to-orbit (TSTO) expendable (ELV), hybrid (HLV), and reusable (RLV) launch systems. This comparison was accomplished using top level mass and cost estimating relations (MERs, CERs). Mass estimating relationships were correlated to existing launch system data and ongoing launch system studies. Cost estimating relations were derived from Dr. Dietrich Koelle's "Handbook of Cost Engineering for Space Transportation Systems". Hybrid launch vehicles appear to be preferable if current or modest increases in launch rates are projected while reusable launch vehicles appear preferable for large projected increases in launch rates. v Acknowledgments I would like to thank everyone who made it possible for me to complete this graduate thesis. First, I would like to convey gratitude to Dr. Milton Franke, my graduate advisor, for guiding me through the thesis process. His teachings in Rocket Propulsion were instrumental in completing this project. Secondly, I would like to offer thanks to John Livingston from ASC/XREC. His mentoring and expertise in rocket design made it possible for me to get started, let alone complete my research. I would also like to thank the rest of the individuals who assisted me during my research. They include, Mike
Space 2004 Conference and Exhibit, 2004
15th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2008
This paper presents the results of numerous space launch vehicle studies which include both horiz... more This paper presents the results of numerous space launch vehicle studies which include both horizontal and vertical launch systems. It was found that horizontal launch vehicles faired poorly when compared with vertical launch systems in almost all measures of performance. Measures of performance included gross weight, empty weight, wetted area, cost, risk, maintenance, and turn time. Ever effort was made to fairly evaluate all designs with consistent methodology. The reasons for the horizontal launch vehicles’ poor showing are explained and quantified.