微小型滚仰式红外导引头光机轴系一体化设计

马俊林; 邢妍; 高群; 杜杰; 刘英

微小型滚仰式红外导引头光机轴系一体化设计

中国科学院长春光学精密机械与物理研究所，吉林长春 130033

基金项目:

吉林省科技发展计划项目 20180201048GX

详细信息

作者简介:
马俊林（1985-），男，黑龙江双城人，助理研究员，硕士研究生，主要从事精密光机结构设计与分析方面的研究

通讯作者:
刘英（1980-），女，副研究员，主要从事红外光学设计和分析，E-mail：liuy613@163com

中图分类号: TH745
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- 被引次数: 0
出版历程
- 收稿日期: 2020-06-09
- 修回日期: 2020-07-30
- 刊出日期: 2021-05-22

Design of Micro-miniature Infrared Seeker with Roll-Pitch Structure

Changchun Institute of Optics, Fine Mechanics, and Physics, Chinese Academy of Sciences, Changchun 130033, China

摘要

摘要: 针对导弹口径微小化的需求，为解决微小型导引头无法全方位扫描的问题，提出一种微小型滚仰式红外导引头光机轴系一体化结构。该光机结构把经典滚仰式导引头两根独立俯仰轴与光机结构本体设计成一体，通过红外探测器固定连接的方式让整体结构更加紧凑并兼具焦距微调功能，在保证成像质量的同时大大减小了光机结构的体积。将建模后的光机结构进行有限元热力耦合分析，在导引头温度、位置和角度等8组极限工作情况下，得到结构件和镜片的热变形。分析结果表明，提出的光机结构满足微小型（80 mm）、抗冲击（10g）和高低温（－40℃~60℃）工作要求，可以预测实际使用时的工作情况，对设计具有重要的指导意义。
- 红外导引头 /
- 滚仰式 /
- 有限元 /
- 仿真分析
Abstract: To meet the requirements of the micro-miniature air-to-air missile and solve the problem of not reaching full field angle, this paper presents a micro-miniature infrared seeker with roll-pitch structure, applying the integration philosophy of optical-mechanical structure and pitching shaft. Compared with the classic roll-pitch frame, this new structure combines two individual pitch shafts; additionally, the optical-mechanical structureusesonly one mechanical part, thus greatly reducing its size. Moreover, this new structure has a focus function that could improve the image quality. After structure design, we conducted thermo-mechanical coupling analysis on structure parts and lens under eight extreme conditions. The results show that the optical-mechanical structure meets the requirement of micro-miniature(80 mm), shock resistance (10g), and high low temperature test (-40℃~60℃). The simulated analysis can predict real conditions and has great guiding significance for optical-mechanical structure design.
- infrared seeker /
- roll-pitch /
- finite element /
- simulated analysis

HTML全文

图 1 滚仰式红外导引头整体结构图

Figure 1. Overall structure of infrared optical seeker with roll-pitch structure

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图 2 俯仰角度图

Figure 2. Pitch angles

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图 3 红外导引头光学设计图

Figure 3. Optical design of infrared seeker

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图 4 光机结构组件图

Figure 4. Component of optical-mechanical structure

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图 5 俯仰安装块图

Figure 5. Pitch mounting

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图 6 网格划分图

Figure 6. Meshing of the lens

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图 7 三种极限位置下镜头组件的变形云图

Figure 7. Deformation nephogram of lens under three extreme conditions

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图 8 三种极限位置下1镜、2镜和3镜的变形云图

Figure 8. Deformation nephogram of len1, len2 and len3 under 3 extreme conditions

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表 1 机械参数

Table 1. Parameters of mechanical performance

Material	Density/(g/cm²)	Rupture modulus/Mpa	Young's modulus/Gpa	Poisson ratio	Thermal coefficient w/(m·℃)	Linear expansion coefficient 10^-6/℃
Nc-Ge	5.33	75	103	0.28	59	5.7
7075Al alloy	2.74	524	76	0.33	237	23.5

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表 2 零件接触关系设置

Table 2. Contacts setting

Mating part	Clamper Tube	Clamper Len1	Tube Len1	Len1 Spacer1	Len2 Spacer1	Len2 Spacer2	Len3 Spacer2	Len2 Tube	Len3 Tube	Tube Mounting
Contact	Bounded	Frictional	Frictional	Frictional	Frictional	Frictional	Frictional	Bounded	Bounded	Bounded

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表 3 网格划分

Table 3. Meshing of parts

Part	Clamper	Len1	Len2	Len2	Spacer1	Spacer2	Tube	Pitch mounting
Mesh size/mm	1	0.2	0.2	0.2	1	1	0.5	0.5
Mesh type	Tetrahedron	Hexahedron	Hexahedron	Hexahedron	Auto	Auto	Tetrahedron	Tetrahedron

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表 4 1镜、2镜和3镜在8种情况下的最大变形量

Table 4. Maximum deformation of len1, len2 and len3 under 8 limited conditions

	0° -40℃ +1 mm	0° -40℃ -1 mm	0° 60℃ +1 mm	0° 60℃ -1 mm	90° -40℃ +1 mm	90° -40℃ -1 mm	90° 60℃ +1 mm	90° 60℃ -1 mm
Len 1	0.0318	0.0324	0.0195	0.0199	0.0324	0.0318	0.0195	0.0198
Len 2	0.0189	0.0202	0.0119	0.0137	0.0178	0.0172	0.0112	0.0125
Len 3	0.0114	0.0123	0.0073	0.0089	0.0099	0.0083	0.0068	0.0081

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