Approximate evaluation method for reliability of large-scale multi-state series-parallel system

摘要

An approximate evaluation method for reliability of a large-scale multi-state series-parallel system is provided, wherein for a multi-state series-parallel system, a connection structure between a parent node and all child nodes thereof is divided into four categories which are treated differently; according to the four categories, the probability distribution of the parent node of each level of a complete tree structure is calculated in turn from end leaf nodes; finally, probability distribution of a root parent node of the whole multi-state series-parallel system is obtained, thereby obtaining the reliability of the multi-state series-parallel system. The present invention realizes approximate evaluation of the reliability of the large-scale multi-state series-parallel system, and realizes a balance between calculation accuracy and calculation efficiency, so as to improve computational complexity from exponential complexity of originally accurate calculation to a quadratic term, thereby greatly improving a calculation speed.