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Computer-Automated Evolution of an X-Band Antenna for NASA's Space Technology 5 Mission

机译:用于NASA太空技术5任务的X波段天线的计算机自动演化

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Whereas the current practice of designing antennas by hand is severely limited because it is both time and labor intensive and requires a significant amount of domain knowledge, evolutionary algorithms can be used to search the design space and automatically find novel antenna designs that are more effective than would otherwise be developed. Here we present our work in using evolutionary algorithms to automatically design an X-band antenna for NASA's Space Technology 5 (ST5) spacecraft. Two evolutionary algorithms were used: the first uses a vector of real-valued parameters and the second uses a tree-structured generative representation for constructing the antenna. The highest-performance antennas from both algorithms were fabricated and tested and both outperformed a hand-designed antenna produced by the antenna contractor for the mission. Subsequent changes to the spacecraft orbit resulted in a change in requirements for the spacecraft antenna. By adjusting our fitness function we were able to rapidly evolve a new set of antennas for this mission in less than a month. One of these new antenna designs was built, tested, and approved for deployment on the three ST5 spacecraft, which were successfully launched into space on March 22, 2006. This evolved antenna design is the first computer-evolved antenna to be deployed for any application and is the first computer-evolved hardware in space.
机译:尽管目前手工设计天线的做法受到严重限制,因为它既费时又费力,并且需要大量领域知识,但可以使用进化算法来搜索设计空间并自动找到比以下方法更有效的新颖天线设计否则将被开发。在这里,我们介绍了我们使用进化算法为NASA的航天技术5(ST5)航天器自动设计X波段天线的工作。使用了两种进化算法:第一种使用实值参数向量,第二种使用树状生成表示法来构造天线。两种算法中性能最高的天线均经过制造和测试,均优于天线承包商为任务而设计的手工设计天线。航天器轨道的后续变化导致航天器天线需求的变化。通过调整健身功能,我们可以在不到一个月的时间内快速开发出一套新的天线来完成这项任务。这些新的天线设计之一已被制造,测试和批准用于3架ST5航天器,并于2006年3月22日成功发射到太空中。这种演进的天线设计是首款可用于任何应用的计算机进化天线。并且是太空中第一个计算机进化的硬件。

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