论文部分内容阅读
为实现在月球表面期望的着陆点进行精确软着陆(PPL),在开环制导规划出的最优标称轨迹基础上,考虑动力下降过程中的干扰和不确定性,对在轨闭环轨迹跟踪制导方法进行研究.针对月球PPL三维球体非线性轨道动力学模型,充分考虑自主制导的鲁棒性、实时性要求,采用动态平面控制技术的思想,解决退步法存在的“计算复杂性膨胀”问题,并证明了闭环系统的稳定性.仿真算例表明,该方法不仅算法简单,过渡过程能够实现快速跟踪,而且能够保证稳态跟踪误差在预先给定的范围之内且可以自由调节.
In order to realize accurate soft landing (PPL) at the expected landing site on the lunar surface, based on the optimal nominal trajectory planned by the open-loop guidance, considering the disturbance and uncertainty in the process of dynamic descent, trajectory tracking Guidance method.Aiming at the lunar PPL three-dimensional spherical nonlinear orbital dynamics model, fully considering the robustness and real-time requirement of autonomous guidance, the idea of dynamic plane control technology is used to solve the problem of “Complication Complexity Expansion” "And prove the stability of the closed-loop system.The simulation results show that this method not only has the advantages of simple algorithm, rapid tracing in the transition process, but also ensures that the steady-state tracking error is within a predetermined range and can be adjusted freely.