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- W2321839339 abstract "For future human missions to the Moon, Mars, or beyond, having the appropriate spare parts may mean the difference between mission success and failure. Our previous paper described a hybrid parametric-analytical model we developed to estimate the minimum spare parts mass and volume for future human space missions. We now extend that model to capture the effects of components that are common across elements (e.g., spacecraft) and those that are common across subsystems within an element. The model addresses mission phases with several collocated elements (meaning they can share spares for common items) as well as phases with elements that are not collocated and cannot share spares. This enhanced model enables analysts and spacecraft designers to quickly estimate the benefits of employing common components in combination with other design factors, such as redundancy, criticality, SRU replacement, and resource prioritization. The model produces both an estimate of spares requirements for various degrees of component commonality and a resource-versus-system availability curve. An analyst first adjusts characteristics of notional items to describe the future hardware; the model then performs stochastic optimization to produce the spares mix that minimizes spares mass and volume required to meet an availability target. As system designs mature, notional items can be replaced by real items without changing the model or analytical technique." @default.
- W2321839339 created "2016-06-24" @default.
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- W2321839339 date "2006-09-19" @default.
- W2321839339 modified "2023-10-16" @default.
- W2321839339 title "Estimating Spare Parts Requirements with Commonality for Human Space Missions" @default.
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- W2321839339 doi "https://doi.org/10.2514/6.2006-7233" @default.
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