多数交会燃料寻优是基于“线性化相对运动方程(即Hill方程)”求解“最优”燃料消耗的框架进行的,当相对距离较远时,这种方法精度很低,优化得到的控制量无法满足终端精度要求。以寻的段三脉冲燃料优化为例,以搜索的方法进行控制参数寻优,此时搜索空间较大;通过引入“序优化”思想,有效缩小搜索空间,提高搜索效率,求解得到“足够好”的燃料消耗,并给出适合工程实现的燃料优化步骤。仿真结果表明由此得到的控制参数可以满足终端精度要求,且计算量很小。
Most rendezvous fuel optimization methods are based on linearized relative dynamics equation( Hill equation) and search the best value, nevertheless the guiding precision cannot meet the terminal condition when the relative distance is far. This article showed a searching method based on Ordinal Optimization Theory, and simulated the three-impulse fuel optimization for homing phase rendezvous, using Ordinal Optimization to narrow down the design space and find the good enough subset. The result showed that the fuel optimization based on Ordinal Optimization could satisfy the terminal precision and reduce simulation burden.