Design of deployable mechanism and accuracy measurement for heavy-caliber film camera

WU Ying-hui; LIU Lu; GUO Hong-wei; WANG Chun-long; LIU Rong-qiang

doi:10.3788/OPE.20172514.0103

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Design of deployable mechanism and accuracy measurement for heavy-caliber film camera

更新时间：2020-08-13

- Design of deployable mechanism and accuracy measurement for heavy-caliber film camera
- Optics and Precision Engineering Vol. 25, Issue 12z, Pages: 103-110(2017)
- 作者机构：
  
  哈尔滨工业大学机电工程学院,黑龙江哈尔滨,150001
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20172514.0103
  CLC： V445.8
- Received：23 August 2017，
  
  Revised：11 September 2017，
  
  Published：31 December 2017
- 稿件说明：
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吴英辉, 刘路, 郭宏伟等. 大口径薄膜相机伸展机构设计与精度测量[J]. 光学精密工程, 2017,25(12z): 103-110

WU Ying-hui, LIU Lu, GUO Hong-wei etc. Design of deployable mechanism and accuracy measurement for heavy-caliber film camera[J]. Editorial Office of Optics and Precision Engineering, 2017,25(12z): 103-110
吴英辉, 刘路, 郭宏伟等. 大口径薄膜相机伸展机构设计与精度测量[J]. 光学精密工程, 2017,25(12z): 103-110 DOI： 10.3788/OPE.20172514.0103.

WU Ying-hui, LIU Lu, GUO Hong-wei etc. Design of deployable mechanism and accuracy measurement for heavy-caliber film camera[J]. Editorial Office of Optics and Precision Engineering, 2017,25(12z): 103-110 DOI： 10.3788/OPE.20172514.0103.

摘要

为实现大口径、高精度、高稳定空间薄膜成像系统在空间探测和地球观测应用，对相机可展开机构系统设计、精度建模与试验研究。基于空间一维伸展臂机构，提出了一种针对大口径、高精度的空间薄膜光学成像展开机构系统设计方案。可折展薄膜相机光机结构由3个铰接三角桁架伸展臂和由伸展臂支撑的薄膜主镜系统组成。铰接三角桁架的关节铰链由恒力弹簧驱动，在展开后通过锁定销锁定和加强索张紧以保持刚度。考虑伸展臂单元构件尺寸误差和铰链间隙等因素，将伸展臂单元等效，构建精度分析模型，并与样机试验结果对比。设计完成大口径可折展薄膜相机伸展机构，该伸展机构折展比1：15。对伸展臂单元进行地面重复展开精度测量，其轴线、竖直和水平方向的重复展开精度分别为24

m、261

m和218

m。说明该伸展臂具有较大的折展比，同时，伸展臂单元具有较高的重复展开精度。

Abstract

Experimental research on system design of deployable mechanism and accuracy modeling for camera was conducted so as to realize application of heavy-caliber and high-precision spatial film imaging system with high stability to space exploration and earth observation. A systematic design scheme aiming at deployable mechanism of heavy-caliber and high-precision spatial film optics imaging was proposed based on spatial one-dimensional extended arm mechanism. Optical-mechanical structure of deployable film camera was constituted by extended arm of three articulated triangular trusses and primary mirror system of film supported by extended arm. Hinge joint of articulated triangular truss was driven by constant force spring so as to maintain rigidity through locking stop pin and strengthening tensioner after deployment. In consideration of dimension error of unit member for extended arm

hinge gap

and other factors

unit of extended arm was equivalent and precision analysis model was constructed

which was compared with test result of model machine. Deployable mechanism of heavy-caliber deployable film camera was completely designed with folding and deployable rate of 1:15. Unit of extended arm was subject to repetitive deployable accuracy measurement on the ground. Repetitive deployable accuracy in axis

vertical

and horizontal direction was respectively 24

261

and 218

m. It indicates that the extended arm has larger folding and deployable rate. Meanwhile

unit of extended arm has higher repetitive deployable accuracy.

关键词

Keywords

references

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