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Local Effects on E-ELT Global Performance: Two Examples for Requirement Verification

机译：对E-ELT全球绩效的局部影响：两个需求验证示例

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摘要

In this paper two case studies, highlighting the role of the integrated modeling in the performance prediction and requirement verification of the E-ELT are presented. First example discusses the effect of the local wind load on the secondary mirror and the global wavefront error. Analysis and simulations showed that such local effect is one of the main contributors to the telescope error budget. A detailed modeling and simulation approach with the possibility to modify some important mechanical and control parameters led to a. better understanding of the problem and searching for appropriate mitigation strategies. In the second example the effect of friction devices of the lateral support of the azimuth structure is presented. Such devices were originally proposed by the telescope structure contractor to reduce the induced stresses and force due to the temperature variations. A detailed modeling of the friction devices and its inclusion into the telescope dynamical model revealed that some performance and interface requirements are violated.
机译：在本文中，进行了两个案例研究，重点介绍了集成模型在E-ELT的性能预测和需求验证中的作用。第一个示例讨论了局部风荷载对次反射镜的影响和整体波前误差。分析和模拟表明，这种局部效应是望远镜误差预算的主要贡献者之一。一种详细的建模和仿真方法可以修改一些重要的机械和控制参数，从而导致了。更好地了解问题并寻找适当的缓解策略。在第二示例中，展示了方位结构的侧向支撑的摩擦装置的效果。这种设备最初是由望远镜结构承包商提出的，以减少由于温度变化引起的应力和力。摩擦装置的详细建模及其在望远镜动力学模型中的应用揭示了某些性能和接口要求被违反。

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