Optimized design of high-mode main support structure for airborne spectrometer

Yi LI; Xiao-hui ZHANG; Chang-xiang YAN; Zhi-yuan GU

doi:10.3788/OPE.20192708.1783

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Optimized design of high-mode main support structure for airborne spectrometer

Micro/Nano Technology and Fine Mechanics | 更新时间：2020-08-13

- Optimized design of high-mode main support structure for airborne spectrometer
- Optics and Precision Engineering Vol. 27, Issue 8, Pages: 1783-1792(2019)
- 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 130033
  2.中国科学院大学，北京 100039
  3.中国科学院大学材料与光电研究中心，北京 100039
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20192708.1783
  CLC： TH703; TH744
- Received：04 April 2019，
  
  Accepted：07 May 2019，
  
  Published：15 August 2019
- 稿件说明：
移动端阅览
Yi LI, Xiao-hui ZHANG, Chang-xiang YAN, et al. Optimized design of high-mode main support structure for airborne spectrometer[J]. Optics and precision engineering, 2019, 27(8): 1783-1792.
DOI：

Yi LI, Xiao-hui ZHANG, Chang-xiang YAN, et al. Optimized design of high-mode main support structure for airborne spectrometer[J]. Optics and precision engineering, 2019, 27(8): 1783-1792. DOI： 10.3788/OPE.20192708.1783.

摘要

为满足机载光谱仪主支撑结构动力学特性好、质量低等需求，本文进行了主支撑结构的优化设计及试验验证。首先，针对常用结构无法适用于本系统的问题，提出了一种框架式与薄壁筒式结构相结合的总体结构形式，方便对遮光罩与结构进行一体化设计，可有效降低质量且保证刚度；其次，为提高系统模态，采用多变量集成优化方法，在满足质量要求的情况下将其模态由127 Hz提高到156 Hz，使其具有良好的动力学特性；然后，为确定振动环境对系统调制传递函数(MTF)的影响，通过有限元分析与灵敏度矩阵相结合的方法分析了振动环境对系统MTF影响，并通过计算得知本结构能适用于像元尺寸大于10 μm的机载系统；最后，通过对主支撑结构的测振试验与整机结构的波前检测试验，验证了本文设计方法与分析过程的有效性与可行性。本文提出的优化设计方法可为机载遥感仪器结构的优化设计提供参考，将有助于推动机载遥感仪器结构设计技术的发展。

Abstract

To meet the requirements of high dynamic characteristics and overcome the low quality of the main support structure

an optimized design was devised and test verification of the main support structure was conducted. First

to solve the problem that classic support structures could not be applied to this system

a general structural form combining a frame-type structure and a thin-walled tubular structure was proposed. This form conveniently integrates the hood and structure to improve quality and ensure rigidity. Second

multi-variable integration optimization was adopted to improve the first-order mode from 127 to 156 Hz when the quality requirement was also met

thereby effectively improving the dynamic characteristics. Thereafter

to determine the influence of the vibration environment on the system MTF

the influence of the vibration environment on the system MTF was analyzed by combining finite element analysis and a sensitivity matrix. The scope of application demonstrates that the structure could be applied to an airborne system with a pixel size of >10 μm. Finally

the effectiveness and feasibility of the design method and analysis process were verified by a vibration test and a wavefront aberration detection test. The optimized design method proposed in this paper can provide reference for the optimized design of airborne remote sensing instrument structures. This paper will contribute to the development of structure design techniques for airborne remote sensing instruments.

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