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首页> 外文会议>International symposium on photoelectronic detection and imaging;ISPDI 2011 >Thermal optimum design for tracking primary mirror of Space Telescope
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Thermal optimum design for tracking primary mirror of Space Telescope

机译：跟踪太空望远镜主镜的热优化设计

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In the conventional method, the structural parameters of primary mirror are usually optimized just by the requirement of mechanical performance. Because the influences of structural parameters on thermal stability are not taken fully into account in this simple method, the lightweight optimum design of primary mirror usually brings the bad thermal stability, especially in the complex environment. In order to obtain better thermal stability, a new method about structure-thermal optimum design of tracking primary mirror is discussed. During the optimum process, both the lightweight ratio and thermal stability will be taken into account. The structure-thermal optimum is introduced into the analysis process and commenced after lightweight design as the secondary optimum. Using the engineering analysis of software ANSYS, a parameter finite element analysis (FEA) model of mirror is built. On the premise of appropriate lightweight ratio, the RMS of structure-thermal deformation of mirror surface and lightweight ratio are assigned to be state variables, and the maximal RMS of temperature gradient load to be object variable. The results show that certain structural parameters of tracking primary mirror have different influences on mechanical performance and thermal stability, even they are opposite. By structure-thermal optimizing, the optimized mirror model discussed in this paper has better thermal stability than the old one under the same thermal loads, which can drastically reduce difficulty in thermal control.
机译：在传统方法中，通常仅通过机械性能的要求来优化主镜的结构参数。由于在这种简单方法中并未充分考虑结构参数对热稳定性的影响，因此主镜的轻量化优化设计通常会带来不良的热稳定性，尤其是在复杂的环境中。为了获得更好的热稳定性，讨论了跟踪主镜结构热优化设计的新方法。在最佳过程中，将同时考虑轻量化比和热稳定性。在分析过程中引入了结构热最优，并在轻量化设计之后开始将其作为次要最优。使用软件ANSYS的工程分析，建立了镜面的参数有限元分析（FEA）模型。在适当的轻量化比的前提下，将镜面结构热变形的均方根值和轻量化比作为状态变量，将温度梯度载荷的最大均方根作为对象变量。结果表明，跟踪主镜的某些结构参数对机械性能和热稳定性有不同的影响，即使它们是相反的。通过结构热优化，本文讨论的优化镜像模型在相同的热负荷下具有比旧模型更好的热稳定性，从而可以大大降低热控制的难度。

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