耦合扰动下船载成像系统的复合稳像

卢晓东; 吴天泽; 周军; 赵斌; 马晓媛

doi:10.3788/OPE.20172505.1291

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耦合扰动下船载成像系统的复合稳像

信息科学 | 更新时间：2020-07-07

- 耦合扰动下船载成像系统的复合稳像
- Compound image stabilization for coupled disturbance in ship-borne imaging system
- 光学精密工程 2017年25卷第5期页码：1291-1299
- 作者机构：
  
  西北工业大学航天学院, 陕西西安 710072
- 作者简介：
  
  [ "卢晓东 (1978-), 男, 河南鲁山人, 博士, 副教授, 2006年于西北工业大学获得博士学位, 主要从事飞行器半实物仿真、多源信息处理技术研究。E-mail:luxiaodong@nwpu.edu.cn" ]
  吴天泽 (1992-), 男, 江苏盐城人, 硕士研究生, 2014年于西北工业大学获得学士学位, 主要从事飞行器半实物仿真、图像处理与目标跟踪技术等方面的研究。E-mail:wutianze12@sina.com WU Tian-ze, E-mail:wutianze12@sina.com
- 基金信息：
  
  国家自然科学基金资助项目(61104194);航天支撑技术基金资助项目(2015-HT-XGD);中央高校基本科研业务费专项资金资助项目(3102015BJ（Ⅱ）ZS024)
- DOI：10.3788/OPE.20172505.1291
  中图分类号： U674.82;TP274.2
- 收稿日期：2016-10-08，
  
  录用日期：2016-12-5，
  
  纸质出版日期：2017-05-25
- 稿件说明：
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卢晓东, 吴天泽, 周军, 等. 耦合扰动下船载成像系统的复合稳像[J]. 光学精密工程, 2017,25(5):1291-1299.

Xiao-dong LU, Tian-ze WU, Jun ZHOU, et al. Compound image stabilization for coupled disturbance in ship-borne imaging system[J]. Optics and precision engineering, 2017, 25(5): 1291-1299.
卢晓东, 吴天泽, 周军, 等. 耦合扰动下船载成像系统的复合稳像[J]. 光学精密工程, 2017,25(5):1291-1299. DOI： 10.3788/OPE.20172505.1291.

Xiao-dong LU, Tian-ze WU, Jun ZHOU, et al. Compound image stabilization for coupled disturbance in ship-borne imaging system[J]. Optics and precision engineering, 2017, 25(5): 1291-1299. DOI： 10.3788/OPE.20172505.1291.

摘要

针对船载精密成像系统在船体晃动时产生的杆臂牵连平动和等效圆锥旋转，提出了一种将惯性量测信息引入电子稳像技术对耦合干扰进行补偿的方法。首先，基于俯仰-偏航式光学稳定平台分析其在视线稳定过程中所产生的等效圆锥旋转，推导了视线旋转角与平台转角之间的数学关系。然后，分析了杆臂牵连平动对像点虚化的影响，并结合圆锥旋转构建了耦合扰动模型；针对耦合扰动模型提出利用惯性测量信息复合电子稳像的方法来实现低特征背景下的高精度稳像。最后，通过半实物仿真验证了该方法在低特征环境中的成像稳定精度和实时性。结果显示：提出的方法能够有效补偿俯仰-偏航式稳定平台转动以及船体晃动时形成的耦合干扰，在低特征环境中具有较高的成像稳定精度和实时性，修正误差为亚像素级。图像稳定后的峰值信噪比平均提高了4 dB，基本满足船载光学精密探测系统对实时性、精度、抗干扰能力和稳定性的要求。

Abstract

For the lever arm translational motion and equivalent coning rotation of a ship-borne optical detection system under a great hull attitude

a compound Electronic Image Stabilization (EIS) method which brought inertial information was proposed to compensate the coupled disturbance. Firstly

the equivalent coning rotation existed in the LOS (Line Of Sight) stabilization process was analyzed based on a pitch-yaw optical stabilization system

and the relationship between LOS rotation angle and platform roll angle was deduced. Then

the influence of lever arm disturbance on weak spots was analyzed and a coupled disturbance model combined with the equivalent coning rotation was built. On the basis of the model

a compound image stabilization method by combing inertial information and the EIS method was proposed to realize the image stabilization under a low characteristic environment. Finally

the image stabilization and real time ability of the proposed method were verified through hardware-in-the-loop simulation under the low characteristic environment. The results demonstrate that the method compensates the coupled disturbance from the lever arm translational motion and equivalent coning rotation. It has higher image stabilization and real time ability

and motion estimation is at a sub-pixel level. After compensation

the peak signal-to-noise ratio (PSNR) of image stabilization improves by 4 dB on average. It satisfies the requirements of ship-borne optical imaging systems for strong instantaneity

high precision

strong anti-interference and stable and reliable characteristics.

关键词

Keywords

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