关键词: 微小卫星, 多目标优化设计, Kriging模型, 近似模型管理

Abstract:

According to the characteristics of multi-objective optimization for microsatellite structure,a new method for approximation model management was presented based on the trust region.Orthogonal and Kriging approximate method were used for the approximation model.The crowding distance in multiobjective particle swarm optimization was selected as the core algorithm.Meanwhile,the max-min distance algorithm was used for ensuring the accuracy and rationality for trust measurement.Thus the results consistent with the real model could be obtained.The optimization results from five groups indicate that the structure mass is decreased at different degrees.The maximum amplitude reduction reaches 14.1%.Meanwhile,the first three orders of natural frequencies for the microsatellite are improved obviously.The successful
applications of the approximation model management frame in multi-objective optimization for satellite structure verify the effectiveness and the rationality,which can provide application values for complex engineering multi-objective optimization.

Key words: microsatellite, multi-objective optimization, Kriging model, approximation model management