长条形空间反射镜轻量化及消热化设计

	长条形空间反射镜轻量化及消热化设计
其他题名	Designs of Lightweight and athermal for Rectangular Space Mirror
	李梦庆
学位类型	硕士
导师	张雷
	2015-11
学位授予单位	中国科学院大学
学位专业	机械制造及其自动化
关键词	遥感卫星离轴三反光学系统长条形空间反射镜有限元分析面形精度消热化设计销钉预紧
摘要	人类赖以生存的地球正在面临着前所未有的挑战：资源过度开采、煤炭及石油等能源燃料的大量使用、地球温度升高、热带雨林面积锐减，人口的剧烈膨胀，生物多样性的减少等等。这些与地球紧密相关的各个方面也都与人类的生存和发展密不可分。要想充分、全面认识和及时了解地球的变化，就要把地球作为一个系统对象加以研究。随着人类社会不断的发展，越来越多的科技和工具被用来了解地球及地球上发生的事件，在众多认识工具之中，空间遥感卫星无疑是最有效的手段之一。为了满足越来越紧迫的高分辨率和大视场需求并扩展空间遥感卫星前沿技术领域、长春光机所正在研制大型离轴三反(TMA)空间光学遥感卫星。不仅可以使空间光学遥感相机满足轻质、长焦距、大视场和高分辨率等要求，“离轴三反”（TMA）光学系统还以其无色散、无中心遮拦、可优化变量多，在提高光学系统视场的同时能极大地改善系统的成像质量等优点而得到国内外航天工程师的研究和应用。光学系统提出的指标高、整机结构紧凑是该相机显著的特点。本文研究的大尺寸、大长宽比长条形空间主反射镜是离轴三反遥感器的光机系统的至关重要的部件，其结构刚度的大小、稳定性与否、面形精度的优劣和热稳定性的好坏将直接影响整个相机的成像质量；同时，其轻量化程度直接决定了结构的总重量并影响整个光学遥感器主承力结构的刚度设计指标和发射成本。本文对比研究了多种空间反射镜材料的特性，并研究了反射镜的轻量化技术，通过建立镜体的优化仿真模型，并进过多次“设计—分析—优化设计—再分析”的迭代后，最终确定反射镜轻量化的设计方案。对该长条形反射镜组件进行了消热化设计，探究了胶层厚度与热应力的关系，并对比研究了线性分析和非线性分析时销钉预紧对反射镜面形的影响。同时，通过试验验证了0.07mm厚度的粘结剂满足该反射镜组件的设计要求，并研究了粘结剂((GHJ-01(Z)）固化后抗剪强度与胶层厚度和形状因子的关系。
其他摘要	The earth where humans are living on is facing unprecedented challenges: resource overexploitation, overuse of energy fuels such as coal and oil, the earth temperature increasing, tropical rainforest area reduced, the dramatic expansion of population, the decrease of biological diversity, and so on. These aspects closely related to the earth and human survival and development. In order to acknowledge fully and comprehensively and understand timely the change of the earth, the earth should be seen as a system object. With the constant development of human society, more and more technology and tools have being used to understand the events on the earth and itself. In the tools, space remote sensing satellite is one of the most effective means. In order to get higher resolution and larger field of view needs and extend space remote sensing satellite frontier technology, Changchun institute of optics, fine mechanics and physics is developing the large off-axis three mirror of space optical remote sensing satellite (TMA). Not only making the space optical remote sensing camera having a light weight, long focal length, high resolution and large field of view, the off-axis three-mirror "(TMA) optical system are applied because it’s dispersion, center block, and it has many optimized variables in the field of optical system et al . So it researched and applied by the domestic and foreign aeronautical engineers. High indexes of the optical system, and compact structure is a significant characteristics of the camera. In this paper, the large size and large aspect ratio rectangular space mirror which is researched is the vital parts of the off-axis three-mirror remote sensors. The size of the stiffness of the structure, stability or not, the merits of the surface shape accuracy and thermal stability good or not will directly affect the quality of the camera's imaging; At the same time, its lightweight degree directly determines the total weight of the structure and could influence the stiffness of the optical remote sensor and the launch costs.In this paper, the characteristics of a variety of space mirror materials are studied, and the lightweight technology is studied. Through the establishment of a mirror body of the optimized simulation model, and into many times "design - Analysis - Optimization Design - reanalysis" of the iterative, and ultimately determine the design scheme of lightweight. The strip shaped mirror assembly for eliminating athermal design, explores the relationship between layer thickness and thermal stress and innovation between the studied linear analysis and nonlinear analysis of pin pre tightening of the mirror effect. At the same time, through the experiment to verify the 0.07 mm thickness of adhesive meet the design requirements of the mirror assembly, and the effects of the binder ((GHJ-01 (z)) after curing anti shear strength and adhesive layer thickness and shape factor.
语种	中文
文献类型	学位论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/49248
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	李梦庆. 长条形空间反射镜轻量化及消热化设计[D]. 中国科学院大学,2015.

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