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Resilient autonomous systems: Metrics and simulation-based assessment and life-cycle design tools

Abstract:

A SoS-level framework as an enabler of resilience-based assessment for an Advanced Life Support system (ALS) is proposed, towards efforts to develop and establish methods and tools for “resilient-by-design” space habitats. Enabled by a simulation-based approach and integrated within a Model Based Systems Engineering (MBSE) environment, a software plug-in has been developed and demonstrated for a number of mission scenarios. Beyond the nominal case of no fault habitat conditions, comparisons were performed with respect to a number of proposed resilience metrics against scenarios where faults occurred, along with activated recovery strategies, seeking to preserve and help better manage resources, such as oxygen production and carbon dioxide level control. As a proof-of-concept exercise, this study has demonstrated the benefits of the performance-based resilience assessment approach, and powered by an integrated modeling, simulation and analysis environment, has shown that in future development spirals will be key for the design of more resilient space habitats.