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Inverse problem for shape control of flexible space reflectors using distributed solar pressure

机译:利用分布太阳压力的柔性空间反射镜形状控制的反问题

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This paper investigates controlled elastic deflection of thin circular space reflectors using an inverse problem approach to non-linear thin membrane theory. When changing the surface reflectivity across the membrane, the distributed loads due to ambient solar radiation pressure can be manipulated optically, thus controlling the surface shape without using mechanical or piezo-electric systems. The surface reflectivity can in principle be modulated using uniformly distributed thin-film electro-chromic coatings. We present an analytic solution to the inverse problem of finding the necessary reflectivity distribution that creates a specific membrane deflection, for example that of a parabolic reflector. Importantly, the reflectivity distribution across the surface is found to be independent of membrane size, thickness and solar distance, enabling engineering of the reflectivity distribution directly during the manufacture of the membrane.
机译:本文使用非线性薄膜理论的反问题方法研究薄圆形空间反射器的受控弹性挠度。当更改整个膜的表面反射率时,可以通过光学方式控制由于周围太阳辐射压力而产生的分布负载,从而无需使用机械或压电系统即可控制表面形状。原则上可以使用均匀分布的薄膜电致变色涂层来调节表面反射率。我们提出了一个反问题的解析解决方案,即找到必要的反射率分布以产生特定的膜偏斜,例如抛物面反射器的反偏。重要的是,发现整个表面的反射率分布与膜的尺寸,厚度和太阳光距离无关,从而可以在膜的制造过程中直接设计反射率分布。

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