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Integrated modeling and design of lightweight, active mirrors for launch survival and on-orbit performance

机译:轻型活动镜的集成建模和设计,用于发射存活和在轨性能

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摘要

Lightweight, active mirrors are an enabling technology for large aperture, space-based optical systems. These mirrors have the potential to improve the optical resolution and sensitivity beyond what is currently possible. However, as with all technology development programs, there are remaining issues to be solved before such mirrors can be used in operational systems. As of yet, no efforts have been made to explore the design space or optimize the design of lightweight mirrors across operational environments and constraints. The extremely harsh launch environment is of particular concern because launch survival constraints could dictate aspects of the mirror design. Additionally, on-orbit optical performance, in terms of high spatial frequency wavefront error and low spatial frequency correctability, are extremely important aspects of mirror design. Due to the lack of heritage systems, the best designs for lightweight, active mirrors are not immediately apparent. Therefore, an integrated modeling methodology for technology development programs is developed. This framework uses model-based design and evolutionary models to guide the technology development program. This methodology is applied to the lightweight, active mirror systems of interest. The mirrors are modeled and analyzed in two distinct environments: on-orbit and during launch. The on-orbit model and analysis are presented, as well as the designs with the best optical performance, which tend to have many ribs and actuators. Additionally, a dynamic state-space model of the launch environment is developed. The designs that are most likely to survive launch have few ribs and actuators, directly in conflict with the best on-orbit designs. Launch load alleviation techniques, including techniques making use of the existing embedded actuators, are also implemented to increase the probability of launch survival. Finally, a fully integrated trade space analysis of designs is shown, along with families of designs that perform well with respect to different mission objectives. The integrated modeling approach allows for the seamless combination of the two analysis, as well as a way in which to determine the best performing designs. By using this approach, the model can be updated to include any new insights and to reflect the current state of the technology, making it useful throughout the life cycle of the program.
机译:轻巧的有源反射镜是用于大口径天基光学系统的一项启用技术。这些反射镜具有提高光学分辨率和灵敏度的潜力,超出了当前的范围。但是,与所有技术开发程序一样,在将此类镜像用于操作系统中之前,还有许多问题需要解决。迄今为止,还没有在整个操作环境和约束条件下努力探索设计空间或优化轻型镜的设计。特别苛刻的发射环境特别令人担忧,因为发射生存限制可能会决定后视镜设计的各个方面。另外,就高空间频率波阵面误差和低空间频率可校正性而言,在轨光学性能是反射镜设计的极其重要的方面。由于缺乏传统系统,因此对于轻巧的有源镜的最佳设计尚无法立即显现。因此,开发了用于技术开发程序的集成建模方法。该框架使用基于模型的设计和演化模型来指导技术开发计划。该方法学应用于感兴趣的轻型有源反射镜系统。在两个不同的环境中对镜像进行建模和分析:在轨环境和发射期间。介绍了在轨模型和分析,以及具有最佳光学性能的设计,这些设计往往具有许多肋和致动器。此外,开发了启动环境的动态状态空间模型。最可能幸免于发射的设计几乎没有肋骨和执行器,这与最佳在轨设计直接冲突。还实施了减轻发射载荷的技术,包括利用现有嵌入式致动器的技术,以增加发射存活的可能性。最后,展示了设计的完全集成的贸易空间分析,以及在不同任务目标方面表现良好的设计系列。集成的建模方法可以将两种分析进行无缝组合,并可以确定最佳性能的设计。通过使用这种方法,可以对模型进行更新以包括任何新的见解并反映技术的当前状态,从而使其在程序的整个生命周期中都非常有用。

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  • 作者

    Cohan Lucy Elizabeth;

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  • 年度 2010
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  • 原文格式 PDF
  • 正文语种 eng
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