Abstract
A preliminary reliability, availability, and maintainability (RAM) analysis of the proposed Space Station Freedom electric power system (EPS) was performed using the unit reliability, availability, and maintainability (UNIRAM) analysis methodology. Orbital replacement units (ORUs) having the most significant impact on EPS availability measures were identified. Also, the sensitivity of the EPS to variations in ORU RAM data was evaluated for each ORU. Estimates were made of average EPS power output levels and availability of power to the core area of the Space Station. The results of assessments of the availability of EPS power and power to load distribution points in the Space Stations are given. Some highlights of continuing studies being performed to understand EPS availability considerations are presented. >
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