Abstract:

Reliability of equipment of system of systems (SoS) is studied in light of SoS structure with regard to the complexity and diversity of SoS. Based on hierarchical division for the SoS structure, a mixed model with both features of scale free and small world is proposed to describe the SoS structure. Under random failure and intentional attack, the reliability of SoS is compared. The result suggests that among the BA scale free model, the WS small world model and the mixed model the reliability of SoS all drops with the increase of the failure rate. However, in the mixed model, the reliability drops slowest among the three. So the feasibility of the proposed mixed model is shown through above analysis, which would provide basis for protecting key points and edges in order to optimize the SoS structure.