| 滑模变结构控制的月球着陆舱姿态控制系统设计 |
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| 引用本文： | 常晓飞,闫杰,段丽娟.滑模变结构控制的月球着陆舱姿态控制系统设计[J].火力与指挥控制,2009,34(6). |
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| 作者姓名： | 常晓飞 闫杰 段丽娟 |
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| 作者单位： | 西北工业大学航天学院,陕西,西安,710072 |
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| 摘 要： | 在我国的探月计划中,要实现月球探测器软着陆于月球表面.在分析月球着陆舱软着陆段的飞行任务对于姿态控制要求的基础上,基于滑模变结构控制方法,根据实际姿态角和期望姿态角的偏差,给出了线性滑动模态面的切换方程,采用指数趋近律和边界层削抖的方法,推导出期望控制力矩的计算公式.并研究了姿控发动机的配置特点和点火逻辑.给出了由期望力矩计算实际控制力矩的方法.仿真结果表明,该姿态控制系统能迅速地将着陆舱跟踪到期望姿态.着陆舱经过514s飞行,在距月面2 km处将速度减为零,将姿态调整到垂直向下,完成了飞行任务.飞行轨迹比较平滑,具有较好的鲁棒性和自适应性.
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| 关 键 词： | 软着陆 姿态控制系统 滑模变结构控制 |
The Design of Lunar Lander Attitude Control System based on Variable Structure Control with Sliding Mode |
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| HANG Xiao-fei,YAN Jie,DUAN Li-juan.The Design of Lunar Lander Attitude Control System based on Variable Structure Control with Sliding Mode[J].Fire Control & Command Control,2009,34(6). |
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| Authors: | HANG Xiao-fei YAN Jie DUAN Li-juan |
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| Institution: | College of Astronautics;Northwestern Polytechnical University;Xi'an 710072;China |
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| Abstract: | In the chinese lunar exploration project,soft landing of the lunar explorer on the lunar surface is to be realized.The control requirement in the powered descending phase of the lunar lander is analyzed in the paper.The switch equation for linear sliding surface is deduced by the result of the deflection between the real attitude angles and the anticipant attitude angles based on variable structure control with sliding mode.The formula of anticipant control moment is deduced by adopting the method of expone... |
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| Keywords: | soft landing attitude control system variable structure control with sliding mode |
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