机载宽温条件下反射镜组件与粘接层设计

张家齐; 郭艺博; 张友建; 张志华

doi:10.37188/CO.2022-0194

机载宽温条件下反射镜组件与粘接层设计

doi: 10.37188/CO.2022-0194

张家齐^{1, 2, ,},
郭艺博^{1, 3,},
张友建^4,,
张志华^{1, 3,}

1.
长春理工大学空间光电技术国家地方联合工程研究中心, 吉林长春 130000
2.
长春理工大学光电工程学院, 吉林长春 130000
3.
长春理工大学机电工程学院, 吉林长春 130000
4.
吉林珩辉光电科技有限公司, 吉林长春 130000

基金项目: 国家自然科学基金重大研究计划（No. 91338116）。

详细信息

作者简介:
张家齐（1985—），男，吉林白山人，博士，助理研究员，硕士生导师，2019年于长春理工大学获得博士学位，主要从事伺服跟踪结构、光机系统集成方面的研究。E-mail：zjq_cust@foxmail.com

郭艺博（1998—），男，河南周口人，硕士研究生，2020年于长春理工大学获得学士学位，主要从事激光通信终端、伺服转台结构方面的研究。E-mail：17843081568@163.com

张友建（1992—），男，吉林敦化人，硕士，2020年于长春理工大学获得硕士学位，主要从事光机结构设计、伺服转台结构方面的研究。E–mail：756919950@qq.com

张志华（1998-），男，山东青岛人，硕士研究生，2021年于青岛农业大学获得学士学位，主要从事光电跟瞄装置、伺服转台结构方面的研究。E-mail：zhangzhihua257@163.com

中图分类号: V248.1;TH703
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出版历程
- 收稿日期: 2022-09-16
- 录用日期: 2022-11-02
- 网络出版日期: 2022-12-09

Design of reflector assembly and adhesive layer under airborne wide temperature condition

ZHANG Jia-qi^{1, 2
, ,},
GUO Yi-bo^{1, 3
,},
ZHANG You-jian^4
,,
ZHANG Zhi-hua^{1, 3
,}

1.
National and Local Joint Engineering Research Center of Space and Optoelectronics Technology, Changchun University of Science and Technology, Changchun 130022, China
2.
School of Opto Electronic Engineering, Changchun University of Science and Technology, Changchun 130022, China
3.
School of Mechanical Engineering, Changchun University of Science and Technology, Changchun 130022, China
4.
Jilin henghui photoelectricity technology co, ltd, Changchun 130022, China

Funds: Supported by Project supported by the Major Research plan of the National Natural Science Foundation of China (No. 91338116).

More Information

Corresponding author: zjq_cust@foxmail.com

摘要

摘要:
在机载宽温且反射镜镀膜温度较高条件下，针对传统反射镜镶嵌件粘接工艺导致反射镜粘接失效、铟钢镶嵌件和反射镜线胀系数差异导致宽温下反射镜面型急剧下降的问题，提出了一种反射镜加工镀膜后粘接镶嵌件的方法，并对其胶层参数进行研究。方案采用硅橡胶作为主粘结剂粘结反射镜与镶嵌件，利用硅橡胶固化后的良好弹性缓解支撑件的热变形对反射镜面型的影响。并通过多目标优化选取合适的硅橡胶粘结厚度1.1 mm，硅橡胶宽度7.2 mm，环氧胶厚度0.022 mm。仿真结果显示在重力及60 °C温度变化时，反射镜面型精度RMS值为25.91 nm，镜组模态一阶频率为242 hz。最终面型检测RMS值为15.8 nm，结构谐振频率为213 Hz。试验结果显示，此方案适用于反射镜组件在大温差条件下工作，其结构和粘接层设计能够满足机载宽温和振动条件下的使用要求。
- 单摆镜 /
- 粘结层设计 /
- 有限元分析 /
- 红外搜跟系统
Abstract:
Airborne ambient temperature varies widely and airborne vibration is strong. And the mirror coating temperature is higher, the traditional bonding process will lead to bonding failure. Because of the difference of thermal expansion coefficient between Invar inlay and mirror material, the surface precision of mirror can not meet the requirement of system. Therefore, this paper puts forward a method of bonding the mirror after processing and coating, and designs some important parameters of the adhesive layer. In the scheme, RTV is used as the main binder, the mirror and the inlay are bonded together, and the effect of RTV curing on the structure is alleviated by good elasticity. The thickness of RTV is 1.1 mm, the width of RTV is 7.2 mm and the thickness of epoxy adhesive is 0.022 mm. The simulation results show that the RMS of the mirror shape is 25.91 nm and the first-order frequency of the mirror group mode is 242 Hz under gravity and 60 °C temperature change. The final surface detection RMS is 15.8 nm and the resonance frequency is 213 Hz. The experimental results show that the design of structure and bonding layer can meet the requirements of wide temperature and vibration condition.
- single pendulum mirror /
- bonding layer design /
- finite element analysis /
- infrared tracking system

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图 1 机载红外搜跟系统原理

Figure 1. Principle of airborne infrared searching and tracking system

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图 2 单反镜伺服系统三维模型

Figure 2. Three dimensional model of mirror servo system

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图 3 反射镜组件沿回转轴剖视结构

Figure 3. Mirror assembly profile along axis of rotation

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图 4 胶层方案位置示意

Figure 4. Position indication of glue scheme

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图 5 反射镜组件有限元结构模型

Figure 5. Finite element structural model of mirror assembly

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图 6 RTV厚度对反射镜面型及镜组模态频率的影响

Figure 6. Influence of RTV thickness on the shape and modal frequency of mirrors

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图 7 RTV宽度对反射镜面型及镜组模态频率的影响

Figure 7. Influence of RTV width on the shape and modal frequency of mirrors

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图 8 环氧胶厚度对反射镜面型及镜组模态频率的影响

Figure 8. Effect of epoxy adhesive thickness on mirror shape and mirror group modal frequency

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图 9 反射镜面型仿真拟合流程图

Figure 9. Flow chart of mirror shape simulation

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图 10 zygo干涉仪面型拟合结果

Figure 10. ZYGO interferometer fitting result

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图 11 组件模态分析位移云图。（a）一阶模态；（b）二阶模态；（c）三阶模态。

Figure 11. Displacement cloud diagram of structural modal analysis. (a) First-order mode; (b) Second-order mode; (c) Third-order mode.

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图 12 （a）随机振动结构应力云图；（b）冲击试验应力云图

Figure 12. (a)Stress nephogram of random vibration structure；(b) Isodynamic nephogram of impact test

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图 13 反射镜组件试验现场。（a）随机振动；（b）温度冲击试验

Figure 13. Test site of mirror assembly. (a) Random vibration; (b) Temperature impact test

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图 14 反射镜面型检测光路图

Figure 14. Optical Path Diagram for Measuring Shape Accuracy of Mirror

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图 15 整体结构实际检测面型

Figure 15. Measuring surface shape accuracy of integral structure

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表 1 反射镜组件材料表

Table 1. List of materials for mirror assemblies

Structure	Material	Density ρ/(g/cm³)	Young's modulus E/GPa	CTE α(10⁻⁸/K)	Thermal conductivity λ/[W/(m·k)]	Specific stiffness E/ρ(10⁻⁶·GNm/g)	Thermal distortion ratio λ/α(10⁶W/m)
mirror	SiC	3.2	450	2.3	155.00	140	64.58
back plate、side plate、 bushing part、embedded part、gasket	4J32	8.1	150	2.5	1450	18.5	11

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表 2 五种工况下反射镜面型拟合结果

Table 2. Shape fitting results of mirror under five working conditions

环境温度	20 °C	20 °C	20 °C	-40 °C	60 °C
重力方向	X轴	Y轴	Z轴	Z轴	Z轴
PV值/nm	25.91	22.12	55.45	123.87	96.78
RMS值/nm	3.73	3.63	10.25	25.91	17.55

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