Ant colony algorithm to reliability optimization in Complex System

Redundancy technology and Assignment technology are important methods of improving reliability and security in system. As is well known that the Complex System reliability optimization is a NP-hard problem. In this paper, the Ant Colony Algorithm was used successfully to solve above two questions in Complex System reliability optimization. A vector was introduced to describe the system structure; the complex system was transferred into a network with different node levels. Put pheromone on nodes as strength of attraction to ants. Ants guided by this attraction searched in all levels to find the vector components. The penalty function attributed to system speed up the process of evolution. The simulation results showed the effectiveness of the approach.