Stochastically optimized guidance law design of the deep space lander

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.