期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
一种用于行星间转移轨迹优化的混合优化方法
1
作者 霍明英 齐乃明 +1 位作者 曹世磊 叶炎茂 《国际航空航天科学》 2017年第3期151-162,共12页
本文针对行星间转移轨迹优化问题,提出一种结合Gauss伪谱法和遗传算法的混合优化方法。这种混合优化方法通过遗传算法全局寻优获得Gauss伪谱法中所用的状态变量及控制变量初值,然后Gauss伪谱法根据遗传算法获得的初值进一步寻优,从而克... 本文针对行星间转移轨迹优化问题,提出一种结合Gauss伪谱法和遗传算法的混合优化方法。这种混合优化方法通过遗传算法全局寻优获得Gauss伪谱法中所用的状态变量及控制变量初值,然后Gauss伪谱法根据遗传算法获得的初值进一步寻优,从而克服了传统间接优化法和直接优化法对初值的依赖。本文以地球至火星低推进过渡轨迹优化问题为例,对所提出的混合优化方法进行验证。仿真结果表明,这种优化方法既具有遗传算法的全局寻优能力又具有Gauss伪谱法的局部强收敛特性,能够在无任何初值猜测的情况下完成对近似全局最优解的搜索。 展开更多
关键词 Gausss伪谱法 遗传算法 轨迹优化
下载PDF
Coupled attitude-vibration analysis of an E-sail using absolute nodal coordinate formulation 被引量:3
2
作者 Ce Zhao Mingying Huo +5 位作者 Ji Qi shilei cao Dongfang Zhu Lujun Sun Hongli Sun Naiming Qi 《Astrodynamics》 CSCD 2020年第3期249-263,共15页
In this study,the effects of solar wind on an electric sail(E-sail)are modeled and analyzed using an absolute nodal coordinate formulation(ANCF).First,the thrust of the charged metal tether that makes up the E-sail wa... In this study,the effects of solar wind on an electric sail(E-sail)are modeled and analyzed using an absolute nodal coordinate formulation(ANCF).First,the thrust of the charged metal tether that makes up the E-sail was analyzed and a model was established.Numerical simulations of a single metal tether were performed.Then,an overall E-sail model was established using the connection matrix,and E-sails subjected to different angular velocities were compared.Simulation results of the ANCF model and a dumbbell model were compared at different angular velocities.The results confirm that with a relatively high angular velocity,the flexible metal chain can be approximately regarded as a rigid body.However,with a small angular velocity,the flexibility of the metal chain cannot be ignored. 展开更多
关键词 E-sail absolute nodal coordinate formulation dynamic model
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部