关键词: 自动化立体仓库, 货位分配, 粒子群算法（PSO）, 置换

Abstract: The goods location assignment of an automated warehouse is discussed in the paper.The stability of the shelf and the efficiency of the storage/retrieval operation are taken into account.The mathematic model is built to describe the problem of the location assignment optimization.Improved Particle Swarm Optimization（PSO）based on Pareto optimal solution is used to deal with the location assignment.In the process of optimization，the conception of permutation is adopted to calculate the velocity of the particles.Niche technique has been used to improve the diversity of non-inferior solutions.Archive is used to keep down all the non-inferior ones to the results.The simulation results indicate that it could be used to resolve the problem of the location assignment.

Key words: automated warehouse, location assignment, Particle Swarm Optimization（PSO）, permutation