| 深空着陆器随机优化制导律设计 |
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| 引用本文： | 高艾,崔平远,崔祜涛.深空着陆器随机优化制导律设计[J].宇航学报,2011,32(9):1884-1889. |
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| 作者姓名： | 高艾 崔平远 崔祜涛 |
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| 作者单位： | （1. 哈尔滨工业大学深空探测基础研究中心, 哈尔滨 150080; 2. 北京理工大学深空探测技术研究所, 北京 100081） |
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| 基金项目： | 国家自然科学基金（60874094）;-国家863计划(2008AA12A214);科技部863计划项目(2010AA122206) |
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| 摘 要： | 针对导航估计误差对制导精度的不利影响，提出了一种随机优化制导设计方法。该方法将导航估计性能作为优化项引入制导设计过程中，通过对观测轨迹的优化设计，使视觉导航估计精度得到提高，进而改善了制导性能；同时，引入单步超前优化方法减少迭代运算量。将其应用于深空探测着陆任务，仿真结果表明与传统估计最优制导方法相比，该随机优化制导律有效降低了估计误差给制导系统带来的不利影响，使着陆器导航与制导系统整体性能得到改善提高。
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| 关 键 词： | 深空探测 软着陆 导航与制导系统 最优估计 随机优化算法 单步超前方法 |
| 收稿时间： | 2010-09-15 |
Stochastically Optimized Guidance Law Design of the Deep Space Lander |
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| GAO Ai,CUI Ping.Stochastically Optimized Guidance Law Design of the Deep Space Lander[J].Journal of Astronautics,2011,32(9):1884-1889. |
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| Authors: | GAO Ai CUI Ping |
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| Institution: | （1. Deep Space Exploration Research Center, Harbin Institute of Technology, Harbin 150080, China;
2. Institute of Deep Space Exploration Technology, Beijing Institute of Technology, Beijing 100081, China） |
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| Abstract: | 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. |
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| Keywords: | Deep space exploration Soft landing Navigation and Guidance system Optimal estimated Stochastic optimization algorithm One-step-ahead approach |
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