Vibration parameter measurement of TDICCD space camera with mechanical assembly

LIU Hai-long; HAN Cheng-shan; LI Xiang-zhi; JIANG Xiao-nan; SUN Xue-chen; FU Yao

doi:10.3788/OPE.20152303.0729

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Vibration parameter measurement of TDICCD space camera with mechanical assembly

更新时间：2020-08-13

- Vibration parameter measurement of TDICCD space camera with mechanical assembly
- Optics and Precision Engineering Vol. 23, Issue 3, Pages: 729-737(2015)
- 作者机构：
  
  1. 中国科学院长春光学精密机械与物理研究所,吉林长春,中国,130033
  2. 中国科学院大学北京,中国,100049
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152303.0729
  CLC： V447.3
- Received：25 January 2014，
  
  Revised：27 February 2014，
  
  Published：25 March 2015
- 稿件说明：
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刘海龙, 韩诚山, 李祥之等. 机械拼接时间延迟积分CCD空间相机的振动参数检测[J]. 光学精密工程, 2015,23(3): 729-737

LIU Hai-long, HAN Cheng-shan, LI Xiang-zhi etc. Vibration parameter measurement of TDICCD space camera with mechanical assembly[J]. Editorial Office of Optics and Precision Engineering, 2015,23(3): 729-737
刘海龙, 韩诚山, 李祥之等. 机械拼接时间延迟积分CCD空间相机的振动参数检测[J]. 光学精密工程, 2015,23(3): 729-737 DOI： 10.3788/OPE.20152303.0729.

LIU Hai-long, HAN Cheng-shan, LI Xiang-zhi etc. Vibration parameter measurement of TDICCD space camera with mechanical assembly[J]. Editorial Office of Optics and Precision Engineering, 2015,23(3): 729-737 DOI： 10.3788/OPE.20152303.0729.

摘要

为了获取空间相机在轨摄像期间的振动幅频特性

提出了一种基于TDICCD拼接技术的空间相机振动参数检测方法。根据TDICCD拼接原理

利用拼接结构中的重叠成像区域在不同时刻对同一景象成像

通过灰度投影算法对所成图像进行比对求取相对偏移量

拟合偏移量数据

进而根据拟合结果计算出空间相机振动参数。实验结果表明:对于一维单一频率的振动

频率相对误差小于0.5%

振幅绝对误差小于1个像元;对于一维混合频率的振动

频率相对误差小于3%

振幅绝对误差小于2个像元;对于沿推扫方向和垂直推扫方向均为单频振动的二维振动

频率相对误差小于1%

振幅绝对误差小于2个像元。实验结果验证了检测方法的正确性

达到了不增加额外设施

仅利用相机自身结构就能精确测量相机振动参数的目的

并为后续图像复原提供了数据基础。

Abstract

To obtain the vibration amplitude-frequency characteristics of a in-orbit space camera

a space camera vibration parameter detection method by using TDICCD mechanical assembly technique was presented. According to TDICCD mechanical assembly technology

the images of same scene were taken by a TDICCD overlapping area at different moments

then the images were compared by using gray projection algorithm to derive the relative offset. Finally

the offset data were fitted

and the vibration parameters of the space camera were obtained according to the fitting result. Experimental results show that frequency measurement relative error and the amplitude measurement absolute error are less than 0.5% and 1 pixel respectively for the one dimensional single frequency vibration; and those are less than 3% and 2 pixel respectively for one dimensional mixed frequency vibration. Moreover

for two dimensional vibration which are both single frequency vibration along and vertical to the scanning direction

the frequency measurement error and the amplitude measurement error are less than 1% and 2 pixel

Respectively. Experimental results demonstrate the correctness of detection methods

reach the purpose of detecting vibration parameters without additional facilities except the camera structure

and provide a data base for the subsequent image restoration.

关键词

Keywords

references

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Related Institution

College of Mechanical and Electrical Engineering, Changchun University of Technology

Tsinghua Shenzhen International Graduate School， Tsinghua University

School of Health Science and Engineering，University of Shanghai for Science and Technology

School of Mechanical Engineering， University of Shanghai for Science and Technology

School of Optical-Eletrical and Computer Engineering，University of Shanghai for Science and Technology

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