深空着陆器随机优化制导律设计

摘要

A method for designing stochastically optimized guidance law is proposed for the adverse effect of estimation error on guidance accuracy. The estimated navigation performance is introduced into the process of guidance design as an optimization term, and the estimation accuracy of visual navigation is improved by optimizing the observation trajectory, thus improving the guidance performance. Furthermore, to avoid iterative computations, the idea of one-step-ahead (OSA) optimization is introduced as a suboptimal strategy. Numerical simulations have demonstrated the effectiveness of the approach proposed.%针对导航估计误差对制导精度的不利影响,提出了一种随机优化制导设计方法.该方法将导航估计性能作为优化项引入制导设计过程中,通过对观测轨迹的优化设计,使视觉导航估计精度得到提高,进而改善了制导性能；同时,引入单步超前优化方法减少迭代运算量.将其应用于深空探测着陆任务,仿真结果表明与传统估计最优制导方法相比,该随机优化制导律有效降低了估计误差给制导系统带来的不利影响,使着陆器导航与制导系统整体性能得到改善提高.