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Quantifying the Impact of Systems Interdependencies in Space Systems Architectures

机译：量化系统在太空系统架构中的相互依赖性的影响

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摘要

Due to the high number of systems in a space mission architecture and to their complex interactions, identifying risk and critical operational dependencies is not obvious. Traditional systems engineering methodology and risk assessment does not capture the impact of interactions between systems nor the cascading effects of disruptions. Based on these considerations, the Systems Operational Dependency Analysis methodology was developed for use by systems analysts and decision makers. This methodology utilizes a parametric model of interdependencies between systems to quantify the direct and indirect impact of system disruptions on other systems, as well as identify root causes. The results are effective at providing decision support for prioritizing technology investment based on risk reduction associated with potential system disruptions. Expanding on research presented at IAC 2018 and based on a collaboration with NASA Marshall Space Flight Center, this paper applies the Systems Operational Dependency Analysis methodology to NASA Lunar Gateway in collaboration with NASA's lunar exploration plans. The paper presents a hierarchical representation of the interdependencies between a Gateway habitat's systems and subsystems, demonstrates quantification of the impact of disruption, and assesses the criticality of the constituent systems and subsystems.
机译：由于空间任务架构中的系统数量大，并识别风险和关键操作依赖性的较多的系统，并不明显。传统系统工程方法和风险评估不会捕捉系统之间的相互作用的影响，也不捕捉干扰的级联影响。基于这些考虑因素，开发了系统操作依赖性分析方法，以供系统分析师和决策者使用。该方法利用系统之间的相互依赖性的参数模型来量化系统中断对其他系统的直接和间接影响，以及识别根本原因。结果在提供基于与潜在系统中断相关的风险降低的优先考虑技术投资的决策支持有效。本文将系统运营依赖性分析方法与美国宇航局的月球勘探计划合作，将系统操作依赖性分析方法应用于NASA月球网关的系统运营依赖性分析方法。本文提出了网关栖息地系统和子系统之间相互依存性的分层表示，表明了破坏影响的量化，并评估了组成系统和子系统的临界性。

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