Ultra-high-precision reflectors - design concepts, structural optimization and zero-expansion composites
| Autor: | Cheng Zhang, Li Yanyong, Qi Xueliang, Ma Xiaofei, Wei Juanfang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Numerical Analysis
Materials science business.industry Thermal deformation Zero (complex analysis) Reflector (antenna) 02 engineering and technology 021001 nanoscience & nanotechnology Computer Science Applications 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials Remote sensing (archaeology) Modeling and Simulation Satellite remote sensing General Materials Science Aerospace engineering 0210 nano-technology business |
| Zdroj: | International Journal of Computational Materials Science and Engineering. :1850009 |
| ISSN: | 2047-685X 2047-6841 |
| DOI: | 10.1142/s2047684118500094 |
| Popis: | The developing of satellite remote sensing technology demands high precision reflectors. This paper is devoted to the development of an ultra-high precision reflector, including the structural design and optimization, and even a kind of zero-expansion composite. A novel parabolic reflector without the traditional back surface is designed, simulated and analyzed. The relationships of some key parameters(surface error and weight) with other structural parameters are obtained. As the Kevlar fabric has negative CTE (Coefficient of Thermal Expansion) and CFRP has positive CTE, a Kevlar fabric-assisted carbon fiber composite is suggested. This composite exhibits the advantage of zero-expansion in 2D plane. Further, this zero-expansion laminate has been successfully manufactured. Finally, based on the design and analysis of the zero-expansion composite with CFRP and Kevlar fabric, an ultrahigh-precision reflector is successfully designed. The results of finite element method (FEM) show that the thermal distortion of the reflector meets the requirements of remote satellite, whose working radio frequency (RF) is 600[Formula: see text]GHz. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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