@inproceedings{oai:jaxa.repo.nii.ac.jp:00017370, author = {本橋, 和宏 and 関, 建 and 山口, 雄仁 and 吉田, 洋明 and 石川, 芳男 and Motohashi, Kazuhiro and Seki, Takeshi and Yamaguchi, Katsuhito and Yoshida, Hiroaki and Ishikawa, Yoshio}, book = {宇宙輸送シンポジウム 平成14年度, Proceedings of Space Transportation Symposium FY2002}, month = {Apr}, note = {It has been attempted to develop a multidisciplinary design optimization tool for a large-scale system using Genetic Algorithm (GA), and to apply this results of the latest calculation for the problem above obtained by the developed tool showed that airframes (solutions) converged on four areas in the solution space and sensitivity of design variables of the airframe shape was remarkably different in each convergence area. Although high-ranking solutions having good value of the performance index have various airframe configurations, those flight trajectories hardly changed. The best solution showed that it is necessary to reduce the weight of airframe components and to improve the performance of air-breathing engine for realizing a feasible airframe size. It is suggested that this tool is absolutely useful for searching a solution at the conceptual designing phase of a spaceplane., 資料番号: AA0045426034}, pages = {137--140}, title = {次世代型宇宙輸送機の機体設計と飛行経路の統合的最適化}, year = {2003} }