Designs Of Lightweight And Athermal For Rectangular Space Mirror

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.