| 摘要: |
| 转移轨道优化设计在小行星探测任务中具有极其重要的作用。基于四体动力学模型，引入微分修正方法对转移轨道进行修正，然后提出一种修正量改进模型，在确保微分修正过程收敛的同时提高收敛速度。为进一步减小轨道转移所需的速度脉冲，基于三脉冲轨道转移策略构建了转移过渡点的参数模型，并采用遗传算法对转移轨道进行全局优化设计。最后以近地小行星为研究对象进行仿真分析。结果表明，基于改进的微分修正方法和三脉冲轨道转移策略，可有效用于小行星转移轨道优化设计问题。 |
| 关键词: 小行星探测 微分修正 修正量改进 三脉冲转移 遗传算法 |
| DOI： |
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| 基金项目:科技基础加强计划技术领域基金（JSLY-49-A49017） |
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| The Three-Impulses Transfer Trajectory Design and Optimization Based on the Differential Correction Method |
| ZHOU Jing,ZHANG Wanqing,QU Qingyu |
| (Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China) |
| Abstract: |
| The transfer trajectory design and optimization play an important role in the asteroid exploration missions.Based on the four-body dynamic model, the differential correction method is used to correct the transfer trajectory.Then an improved model of correction is proposed to ensure and speed up the rate of convergence.In order to further decrease the velocity impulse which is needed in the transfer trajectory, the model of transition point is constructed on the base of three-impulses strategy and the genetic algorithm (GA) is used to optimize the entire transfer trajectory.Finally a near Earth asteroid is chosen as the object to study the transfer problem, the result shows that the combination of improved differential correction method and GA is effective in designing the optimal transfer trajectory in the near Earth asteroid exploration missions. |
| Key words: Asteroid exploration Differential correction Correction adjustment Three-impulses transfer strategy Genetic algorithm |