Using a life-cycle-cost criterion for multi-disciplinary design studies for the Manned Space StationA life-cycle-cost measure for the Manned Space Station is suggested which considers the mass, initial cost, aerodynamic drag, electrical power, moment, required ground support, and expected life of subsystems or components. It is proposed that this life-cycle-cost measure be considered as a criterion for design trade-off studies involving controls and structures. Calculating the related sensitivities in the optimization process is discussed and then applied to specific examples. In the first example, the reaction control system is analyzed with regard to the design of its supporting structure and selection of rocket type. Values of support beam length, structural material selection, and rocket propellant selection are determined which minimize life-cycle-cost. In the second example, the alignment of solar arrays are analyzed for efficiency with regard to generating power, their drag, and their aerodynamic moment. Alignment angles are determined which again minimize life cycle cost. It seems clear from these and other examples that the proposed criterion has value for multi-disciplinary design studies for the Manned Space Station.
Document ID
19850037448
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Taylor, L. W. (NASA Langley Research Center Hampton, VA, United States)
Dunning, R. S. (NASA Langley Research Center Flight Dynamics and Control Div., Hampton, VA, United States)