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基于Terminal滑模的小行星探测器着陆连续控制

DOI: 10.13700/j.bh.1001-5965.2013.0638, PP. 1323-1328

Keywords: 小行星,软着陆,PD控制,Terminal滑模控制,连续控制

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Abstract:

针对弱引力场不规则小行星探测器安全下降与着陆,提出了一种基于比例微分(PD,ProportionalplusDerivative)及非奇异Terminal滑模的连续控制方法.在着陆点坐标系下推导了探测器的动力学方程,设计了开环燃料次最优多项式标称轨迹制导方法.针对下降和着陆两个不同阶段提出了PD和非奇异Terminal滑模变结构连续控制方法.将PD控制的易操作性与非奇异Terminal滑模控制收敛速度快、调整时间短有效结合,保证了探测器安全着陆.仿真结果表明了提出方法的可行性和有效性.

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