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Project WISH: The Emerald CityPhase 3 of Project WISH saw the evolution of the Emerald City (E-City) from a collection of specialized independent analyses and ideas to a working structural design integrated with major support systems and analyses. Emphasis was placed on comparing and contrasting the closed and open cycle gas core nuclear rocket engines to further determine the optimum propulsive system for the E-City. Power and thermal control requirements were then defined and the question of how to meet these requirements was addressed. Software was developed to automate the mission/system/configuration analysis so changes dictated by various subsystem constraints could be managed efficiently and analyzed interactively. In addition, the liquid hydrogen propellant tank was statically designed for minimum mass and shape optimization using a finite element modeling package called SDRC I-DEAS. Spoke and shaft cross-sectional areas were optimized on ASTROS (Automated Structural Optimization System) for mass minimization. A structural dynamic analysis of the optimal structure also conducted using ASTROS enabled a study of the modes, frequencies, displacements, and accelerations of the E-City. Finally, the attitude control system design began with an initial mass moment of inertia analysis and was then designed and optimized using linear quadratic regulator control theory.
Document ID
19940021197
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Oz, Hayrani
(Ohio State Univ. Columbus, OH, United States)
Dunne, Jim
(Ohio State Univ. Columbus, OH, United States)
Butchar, Stan
(Ohio State Univ. Columbus, OH, United States)
George, Tommy
(Ohio State Univ. Columbus, OH, United States)
Hellstrom, Rob
(Ohio State Univ. Columbus, OH, United States)
Kringen, Tricia
(Ohio State Univ. Columbus, OH, United States)
Owens, George
(Ohio State Univ. Columbus, OH, United States)
Perrea, Mike
(Ohio State Univ. Columbus, OH, United States)
Semeraro, Paul
(Ohio State Univ. Columbus, OH, United States)
Thorndike, Phil
(Ohio State Univ. Columbus, OH, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1992
Publication Information
Publication: USRA, Proceedings of the 8th Annual Summer Conference: NASA(USRA Advanced Design Program
Subject Category
Spacecraft Propulsion And Power
Accession Number
94N25690
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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