北京航空航天大学学报 ›› 2007, Vol. 33 ›› Issue (08): 963-967.

• 论文 • 上一篇    下一篇

ICO多学科设计优化方法

韩明红   

  1. 北京航空航天大学 机械工程及自动化学院, 北京 100083
  • 收稿日期:2006-10-20 出版日期:2007-08-31 发布日期:2010-09-17
  • 作者简介:韩明红(1974-),男,河南新乡人,博士后,hanminghong@163.com.
  • 基金资助:

    国家自然科学基金资助项目(50275005);国防基础科研资助项目(K1203010804)

ICO multidisciplinary design optimization method

Han Minghong   

  1. School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
  • Received:2006-10-20 Online:2007-08-31 Published:2010-09-17

摘要: 协同优化(CO, Collaborative Optimization)算法在应用中存在计算困难的问题.分析了引起CO算法计算困难的原因;使用L1范数改进了CO算法的学科一致性约束,避免了学科级目标函数导数的不连续性,并从数学理论上证明了改进的学科一致性约束的收敛性;增加系统级罚函数,使系统级优化问题转化为无约束优化问题;使用快速启动方法,在子系统级优化过程中充分合理利用系统级优化求得的最优解;给出了使用改进的学科一致性约束、系统级罚函数和快速启动方法的ICO(Improved Collaborative Optimization)多学科设计优化方法,较好地克服了CO算法存在计算困难的缺点.标准算例实验结果表明,ICO多学科设计优化方法有效提高了算法的稳定性、可靠性和计算效率.

Abstract: Some serious computational difficulties are found in application of collaborative optimization (CO). Reasons that cause computational difficulties in CO were analyzed. The L1 norm was used to improve subsystem consistency constraint and to avoid discontinuities in subsystem object function derivatives. Mathematical theory proved the convergency of the improve subsystem consistency constraint. Penalty function was added to system-level object function to convert unconstrained optimization into constrained optimization. A quick-start strategy was used to make the best use of optimal solution of system-level optimization in subsystem-level optimization. A new improved collaborative optimization (ICO) method was presented. Improved subsystem consistency constraint, system-level penalty function, and the quick-start strategy were used in ICO. These measures overcome the computational difficulties of CO better. Experiment results show that the robustness, reliability and computing efficiency of ICO are higher than those of CO.

中图分类号: 


版权所有 © 《北京航空航天大学学报》编辑部
通讯地址:北京市海淀区学院路37号 北京航空航天大学学报编辑部 邮编:100191 E-mail:jbuaa@buaa.edu.cn
本系统由北京玛格泰克科技发展有限公司设计开发