微尺度力敏器件力学特性及随机响应抑制研究

李林; 王晓燕; 钟俊; 隋杰; 刘婧; 陈建峰; 左富昌

doi:10.3788/OPE.20192707.1561

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微尺度力敏器件力学特性及随机响应抑制研究

微纳技术与精密机械 | 更新时间：2020-08-13

- 微尺度力敏器件力学特性及随机响应抑制研究
- Study on mechanical properties and random response suppression of micro-scale mechanical-sensitive component
- 光学精密工程 2019年27卷第7期页码：1561-1568
- 作者机构：
  
  北京控制工程研究所，北京 100190
- 作者简介：
  
  [ "李林(1990-)，男，湖北郧阳人，博士，工程师，2018年于中国科学院大学获得博士学位，主要从事航天器姿态测量、光学精密仪器设计、光机热集成分析及航天器结构动力学方面的研究。E-mail:cast_lilin@163.com" ]
- 基金信息：
  
  国防重点基础研究/十三五预研项目(D020403)
- DOI：10.3788/OPE.20192707.1561
  中图分类号： V423.4
- 收稿日期：2018-12-29，
  
  录用日期：2019-2-10，
  
  纸质出版日期：2019-07-15
- 稿件说明：
移动端阅览
李林, 王晓燕, 钟俊, 等. 微尺度力敏器件力学特性及随机响应抑制研究[J]. 光学精密工程, 2019,27(7):1561-1568.

Lin LI, Xiao-yan WANG, Jun ZHONG, et al. Study on mechanical properties and random response suppression of micro-scale mechanical-sensitive component[J]. Optics and precision engineering, 2019, 27(7): 1561-1568.
李林, 王晓燕, 钟俊, 等. 微尺度力敏器件力学特性及随机响应抑制研究[J]. 光学精密工程, 2019,27(7):1561-1568. DOI： 10.3788/OPE.20192707.1561.

Lin LI, Xiao-yan WANG, Jun ZHONG, et al. Study on mechanical properties and random response suppression of micro-scale mechanical-sensitive component[J]. Optics and precision engineering, 2019, 27(7): 1561-1568. DOI： 10.3788/OPE.20192707.1561.

摘要

针对空间站用光学仪器上微尺度力学敏感器件随机振动响应值过大的问题，对该器件进行微尺度、精细化建模，研究其力学特性，并对其随机响应采取有效抑制措施。首先，探讨了微尺度模型边界协调和微尺度有限元变分问题，根据微尺度结构特点，建立4种模型，在整机中进行系统级随机振动仿真分析，研究了4种模型微尺度结构的力学特性。接着，在分析比较随机加速度响应值、位移响应值与应力响应值的基础上，对力敏器件微尺度建模方法进行了深入讨论。然后，对力学敏感器件采取了随机响应抑制措施，并进行了仿真分析。最后，对该光学仪器进行了力学试验、热试验和测试试验。结果表明，该光学仪器功能正常，微尺度结构随机加速度响应RMS值最大降低42.4%，随机应力响应降低均在20%以上，应力安全裕度均远大于零；仿真与试验加速度响应结果最大相对误差均在10%以内。证明了所提出的微尺度结构截面四单元建模方法精准、可靠。

Abstract

To solve the problem of excessive random vibration response of a micro-scale mechanical-sensitive component of an optical instrument for a space station

micro-scale and fine modeling of the component was conducted

its mechanical properties were studied

and effective measures were adopted to suppress its random response. First

the boundary coordination of the micro-scale model and the variation problem of the micro-scale finite element were discussed. On this basis and according to the characteristics of the micro-scale structure

four models were established. A system-level random vibration simulation was performed

and the characteristics of the four micro-scale models were studied. Following analysis and comparison of the random response

including the acceleration

displacement

and stress

the micro-scale modeling method was discussed in-depth. Then

random vibration response suppression and a simulation were separately conducted. Finally

mechanical and thermal tests and a testing experiment were performed. Results reveal that the optical instrument has normal functions

the root mean square of the acceleration response of the micro-scale structure is reduced by 42.4%

the stress is reduced by more than 20%

and the stress safety margin is far greater than zero. The maximum relative error of acceleration response for the simulation and test is within 10%. The study thus showes that the proposed four-element modeling method for a cross-section of a micro-scale structure is accurate and reliable.

关键词

Keywords

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