利用视加速度补偿和推力逐级释放的垂直着陆制导方法

针对运载火箭子级垂直返回着陆段的制导问题，本文在应用凸优化的滚动时域在线规划基础上研究了制导鲁棒性的改善策略。为应对着陆后期控制能力不足的情况，在滚动规划过程中引入了推力上界逐级释放的策略。同时，考虑缓解干扰和误差累积的影响，在制导周期内引入视加速度信息对在线规划的推力指令进行补偿，以进一步改善滚动规划的递归可行性。最后，通过数值算例仿真及对比分析验证所提出的补偿策略的有效性。

Guidance of Powered Landing Using Apparent Acceleration Compensation and Thrust Level-Wise Release

The robustness improvement strategy for guidance of rocket powered vertical landing is investigated in this paper based on the receding horizon online convex optimization. The upper bound of thrust in receding horizon planning is level-wise released to cope with insufficient control ability during the ending phase of landing. Meanwhile, the online planned thrust command is compensated using apparent acceleration within each guidance cycle to mitigate the effect of disturbance and accumulative error, improving the recursive feasibility of receding horizon planning. Finally, the effectiveness of proposed strategies is validated with numerical experiments and comparative analysis.