Trajectories to Jupiter via Gravity Assists from Venus, Earth, and Mars
Trajectories to Jupiter via Gravity Assists from Venus, Earth, and Mars
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DOI：
10.2514/2.3650
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发表时间：
1998-08
影响因子：
1.6
通讯作者：
A. Petropoulos;J. Longuski;E. Bonfiglio
中科院分区：
文献类型：
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作者：
A. Petropoulos;J. Longuski;E. Bonfiglio
1999年至2031年发射的木星重力辅助轨道，使用拼接圆锥技术进行了识别艾德。经典的轨道，如金星-地球-地球重力辅助，和许多不太传统的路径，如金星-火星-金星-地球，检查。飞行时间长达约7年被认为是。D-V优化结果表明，金星-地球-地球是最有效的重力辅助弹道类型，几乎每年都有发射机会，并且在低至9 km ~ 2/s ~ 2的弹道上维斯活体发射。如果地球被排除在外，金星-金星-金星引力辅助通常是最好的选择，其弹道轨道的维斯viva低至30 km 2/s2，尽管在某些年份非常规路径更好，例如2012年的金星-火星-金星-金星弹道轨道，其维斯viva为16 km 2/s2。非常规路径，如金星-火星-金星-地球，在2021年有一个3.7年的彗星-时间轨道，偶尔可以显着减少彗星的时间，在非常小的D V成本时，与经典类型相比。
Gravity-assist trajectories to Jupiter, launching between 1999 and 2031, are identi ed using patched-conic techniques. The classical trajectories, such as the Venus–Earth–Earth gravity assist, and many less conventional paths, such as Venus–Mars–Venus–Earth, are examined. Flight times of up to about seven years are considered. The D V-optimized results con rm thatVenus–Earth–Earth is themosteffective gravity-assisttrajectory type,with launch opportunities occurring almost every year and launch vis viva for ballistic trajectories as low as 9 km2 /s2. If the Earth is excluded as a yby body, Venus–Venus–Venus gravity assists are typically the best option,with launch vis viva for ballistic trajectories as low as 30 km2 /s2, although in some years nonconventionalpaths are better, such as a ballistic Venus–Mars–Venus–Venus trajectory in 2012, with a launch vis viva of 16 km2/s2 . Nonconventional paths, such as Venus–Mars–Venus–Earth with a 3.7-year ight-time trajectory in 2021, can occasionally decrease the time of ight signi cantly, at very minor D V cost, when compared with the classical types.