Abstract
Phased-mission system (PMS) is the system subject to multiple, consecutive and non-overlapping tasks. The challenges in analyzing PMS are mainly due to two aspects: dynamic behaviors among phases, and state dependence among phases. This paper aims to evaluate the reliability of non-repairable PMS by a novel SEFT-MC method. In particular, a specific sequence-enforcing fault tree (SEFT) is proposed to correctly depict failure logical relationships between the system mission and its components; then an improved linear algebra representation (I-LAR) approach is introduced for supporting the modular reliability modeling of PMS; after that, combined with Monte Carlo (MC) simulation, the reliability of PMS is evaluated. Finally, an example PMS from a literature is provided to validate the proposed method.
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