打ち上げ日時の多様性を考慮したDESTINY<sup>+</sup>スパイラル軌道の多目的設計最適化

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  • Multi-objective design optimization of DESTINY<sup>+</sup> spiral trajectory in consideration of the diversity of launch date and time

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<p>DESTINY+ (Demonstration and Experiment of Space Technology for INterplanetary voYage, Phaethon fLyby and dUSt analysis) is a small-sized high-performance deep space vehicle proposed by ISAS/JAXA. The mission of DESTINY+ is “Acquisition of small deep space exploration technology, fly-by observation of the asteroid Phaethon and in-situ analysis of interplanetary dust”. To accomplish the mission, it is necessary to optimize the spiral trajectory of DESTINY+ to minimize the time of flight, to minimize the fuel consumption and to minimize the maximum eclipse period. In the previous work, when the spiral trajectory design of DESTINY+ is optimized, the launch date and time of Epsilon rocket are limited. In this study, multiobjective design optimization of the spiral trajectory is conducted by using multiobjective Evolutionary Algorithms to improve the performance while extending the launch date and time. The present results reveal that the launch date and time can be extended by changing Evolutionary Algorithms parameter.</p>

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