環境負荷を考慮した航空経路の多?的最適化
| 整理番号 | 20210018 |
|---|---|
| 種別 | 一般研究-短期共同研究 |
| 研究計画題目 | 環境負荷を考慮した航空経路の多?的最適化 |
| 研究代表者 | Hiroshi Yamashita（German Aerospace Center (DLR) Institute of Atmospheric Physics・Postdoctoral researcher） |
| 研究実施期間 |
2021年12月15日(水) ～
2021年12月16日(木) |
| 研究分野のキーワード | 多?的最適化，微分トポロジー，構造安定性，トポロジー解析可視化 |
| 本研究で得られた成果の概要 |
Climate impact due to aviation emissions is a topic studied world-wide because of its importance for a sustainable society, and now aviation industry is required to reduce the impact. In recent years, a climate-optimized routing has been proposed as an important operational measure for reducing the climate impact from aviation. Benefits of the climate-optimized routing have been examined before. On the other hand, many studies showed that there is a trade-off between climate impact and economic cost. Technically, multi-objective flight trajectory optimizations can be solved and pareto-optimal solutions can be found by model simulations; however, a following decision-making process takes time, because a dimensionality of pareto fronts becomes high in such real-world optimization problems. The aim of this study is to develop an efficient method to explore a geometry of pareto fronts among multiple objectives, understand it, and select the most preferable solution from the pareto-optimal solutions promptly. The three-objective flight trajectory optimizations were solved with respect to flight time, fuel use and climate impact under realistic weather conditions by using the chemistry?climate model EMAC. We applied the knee point analysis method based on the Reed graph to the obtained non-dominated solutions. For two exemplary cases, we successfully captured some knee points for the non-dominated solutions and analyzed the geometry of the pareto fronts. Further analyses are carried out, which could find new eco-efficient flight routes that human experts do not notice. This research deals with the real-world and concrete optimization problem on aviation and climate change on the basis of numerical simulations. However, the problem has the essential core of the issue; that is, the analysis of high-dimensional fields. To exchange some ideas among researchers who work on multi-objective optimizations, differential topology and meteorology, the IMI Short-term Joint Research workshop, “Multi-objective optimization of flight trajectories for mitigating the climate impact from aviation” was held online on December 15?16, 2021. The fruitful discussion and knowledge exchanges are helpful in developing an efficient decision-making method. |
| 組織委員(研究集会) 参加者(短期共同利用) |
Hiroshi Yamashita（German Aerospace Center (DLR) Institute of Atmospheric Physics・Postdoctoral researcher） Bastian Kern（German Aerospace Center (DLR) Institute of Atmospheric Physics・Postdoctoral researcher） 濱田 直希（KLab株式会社・リサーチエンジニア） 櫻井 大督（九州大学 汎オミクス計測・計算科学センター・准教授） |