快速反射镜在像移补偿中的应用

王正玺; 张葆; 李贤涛; 张士涛

doi:10.3788/CO.20201301.0095

快速反射镜在像移补偿中的应用

doi: 10.3788/CO.20201301.0095

王正玺^{1, 2,},
张葆^1, ,,
李贤涛¹,
张士涛^{1, 2}

1.
中国科学院长春光学精密机械与物理研究所, 吉林长春 130033
2.
中国科学院大学, 北京 100049

基金项目:

国家自然科学基金 1705225

详细信息

作者简介:
王正玺(1989-), 男, 河北保定人, 博士研究生, 2014年于哈尔滨工业大学获得学士学位, 主要从事光电平台视轴稳定控制技术研究。E-mail:ldh_wh@163.com

张葆(1966-), 男, 吉林磐石人, 研究员, 博士生导师, 1989年、1994年于长春光机学院分别获得学士、硕士学位, 2004年于中国科学院长春光学精密机械与物理研究所获得博士学位, 主要从事航空光电成像技术方面的研究。E-mail:clearsky_zh@163.com

中图分类号: TP273
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出版历程
- 收稿日期: 2019-03-19
- 修回日期: 2019-05-14
- 刊出日期: 2020-02-01

Application of fast steering mirror in image motion compensation

WANG Zheng-xi^{1, 2
,},
ZHANG Bao^{1
, ,},
LI Xian-tao¹,
ZHANG Shi-tao^{1, 2}

1.
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds:

National Natural Science Foundation of China 1705225

More Information

Corresponding author: ZHANG Bao, E-mail:clearsky_zh@163.com

摘要

摘要: 本文提出了一种基于快速反射镜的像移补偿方法用于解决航空成像中的像移问题。首先通过计算航空相机在曝光时间内的像移速度证明了像移补偿的必要性；针对快速反射镜存在伺服模型不确定性的问题，设计了模型参考自适应控制器；最后通过实验验证了该算法的性能，结果显示：采用本算法后，快速反射镜的阶跃响应稳定时间降低了50%以上，在振动情况下快速反射镜的稳定精度都可以达到10 μrad，精度比传统控制方案提升10倍以上。最终的像移补偿成像实验成功验证了基于快速反射镜的像移补偿方案有较高的工程应用价值。
- 快速反射镜 /
- 像移补偿 /
- 像移速度 /
- 模型参考自适应控制
Abstract: A method of image motion compensation based on Fast Steering Mirrors (FSM) is proposed to solve the problem of image motion in aeronautical imaging. Firstly, the necessity of image motion compensation is proven by calculating the image motion velocity of the aeronautical camera in exposure time. Then, a model reference adaptive controller is designed to solve uncertainties in the servo model of an FSM. The experimental results indicate that the stable time of step response is reduced by more than 50% comparing with traditional methods. The stability accuracy of the FSM can reach 10 μrad even under vibration condition, which means the accuracy of this method is 10 times better than that of traditional methods. A final image motion compensation imaging experiment proves that our image motion compensation scheme based on an FSM has high value in engineering applications.
- Fast Steering Mirrors(FSM) /
- image motion compensation /
- image motion velocity /
- model reference adaptive controller

HTML全文

图 1 航空成像系统几何关系图

Figure 1. Geometry diagram of aeronautical imaging system

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图 2 MRAC控制系统结构框图

Figure 2. Block diagram of MRAC

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图 3 用状态方程描述的MRAC系统框图

Figure 3. MRAC system block diagram described by equation of state

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图 4 快速反射镜结构示意图

Figure 4. Schematic diagram of a FSM

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图 5 快速反射镜频率响应

Figure 5. Frequency responses of the FSM system

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图 6 带速率反馈的二阶系统示意图

Figure 6. Block diagram of a second order system with rate feedback

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图 7 引入速率反馈前后快速反射镜开环频率响应

Figure 7. Open loop frequency responses of the FSM with and without rate feedback

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图 8 ω_nt_s-ξ关系曲线

Figure 8. ω_nt_s-ξ relationship curves

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图 9 快速反射镜硬件实验平台

Figure 9. Hardware experimental platform for FSM

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图 10 快速反射镜闭环阶跃响应曲线

Figure 10. Closed-loop step response curve of FSM

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图 11 阶跃响应稳态误差

Figure 11. Steady state error of step response

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图 12 振动条件下的位置稳定误差

Figure 12. Position stability error under vibration conditions

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图 13 成像系统原理示意图

Figure 13. Schematic diagram of imaging system

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图 14 平台扫描速度为5(°)/s时，几种情况的像移补偿效果对比

Figure 14. Comparison of image shift compensation effect for three different conditons with platform scanning speed of 5(°)/s

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表 1 不同转速时系统分辨率对比

Table 1. System resolution comparison at different speeds

平台转速(°/s) 2 3 4 5

分辨率(cycles/mm) 13 13 13 12

下载: 导出CSV

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