Space habitats will involve a complex and tightly coupled combination of hardware, software, and humans, while operating in challenging environments that pose many risks, both known and unknown. It will not be possible to design habitats that are immune to failure, nor will it be possible to foresee all possible failures. Rather than aiming for designs where “failure is not an option,” habitats must be resilient to disruptions. We propose an approach to resilient design for space habitats based on the concept of safety controls from system safety engineering. We model disruptions using a state-and-trigger approach, where the space habitat is in one of three distinct states at each time instance: nominal, hazardous, or accident. We use safety controls as ways of preventing a system from entering or remaining in a hazardous or accident state. We develop a safety control option space for the habitat, from which designers can select the set of safety controls that best meet resilience, performance, and other system goals. The safety control option space is likely to be large, accordingly, we design a database that links safety controls to the applicable states and triggers. We demonstrate our approach on the early design stage of a Martian space habitat.
Resilient Space Habitat Design Using Safety Controls
17th Biennial International Conference on Engineering, Science, Construction, and Operations in Challenging Environments ; 2021 ; Virtual Conference
Earth and Space 2021 ; 992-1003
2021-04-15
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Resilient Space Habitat Design Using Safety Controls
NTRS | 2021
|Resilient Space Habitat Design Using Safety Controls
TIBKAT | 2021
|Resilient Space Habitat Design Using Safety Controls
NTIS | 2021
|