Lambert transfer based on ant colony algorithm and Powell-s method
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摘要: 研究了两次脉冲时刻均不固定的Lambert轨道转移的优化问题,目标是找到施加两次脉冲的最优时刻,使燃料和转移时间的加权和最小.鉴于传统的优化算法难以获得该优化问题的全局最优解,提出了一种蚁群算法和Powell法相结合的优化算法,给出了算法的设计步骤.该算法结合了蚁群算法的全局搜索能力和Powell法的局部寻优能力,在保证全局搜索能力的同时,提高了算法的局部寻优能力和精度,减少了寻优时间.通过两个算例验证了这种结合的有效性和准确性.Abstract: The optimization of Lambert two-impulse orbital transfer with unfixed two impulses time was studied. The goal was to find the optimal two impulses time to minimize the weighted sum of consumed fuel and transfer time. Because traditional optimization algorithms were difficult to get global optimal results of the problem, an optimization algorithm which combines ant colony algorithm (ACA) and Powell-s method was then proposed. The new algorithm combined global search capacity of ACA and local search capacity of Powell-s method. It not only provided the global search capacity, but also improved the local search capacity and reduced the search time. Two examples were computed in the end. The results indicate that the optimization algorithm is valid to solve the optimal orbital transfer problem and the optimization is accurate.
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Key words:
- impulse /
- orbital transfer /
- optimization
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