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超轻,强,自编程的机械超材料.

Christine E Gregg1, Damiana Catanoso2, Olivia Irene B Formoso1

  • 1NASA Ames Research Center, Moffett Field, CA, USA.

Science robotics
|January 17, 2024
PubMed
概括

研究人员开发了一种机器人结构系统,一种可编程物质,能够自我重新配置. 这项创新为各种应用提供了高性能,适应性强的结构,包括太空探索.

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科学领域:

  • 机器人和材料科学 机器人和材料科学
  • 超材料和可编程物质.

背景情况:

  • 在适应性基础设施,太空探索和灾难响应中,对多功能,可重新配置材料的需求一直是长期目标.
  • 现有的高性能材料和托架系统缺乏适应动态环境所需的适应性.

研究的目的:

  • 介绍和演示机器人结构系统作为可编程物质的实际实现.
  • 为了实现与传统材料和托架系统相匹配的机械性能和可扩展性.
  • 使用简单的机器人实现大型结构的自主组装和重新配置.

主要方法:

  • 采用纤维增强复合材料状建筑块来创建作为机械元材料起作用的格子结构.
  • 采用两种类型的移动机器人进行运输,放置和可逆固定,利用格子周期来提高精度.
  • 应用可编程物质算法,以确保自动组装和重新配置的尺寸和复杂性的可扩展性.

主要成果:

  • 成功演示了256个单元的细胞组装,以及对格子结构的机械测试.
  • 达到超轻质量密度 (0.0103 g/cm3),具有高特异强度 (11.38 kPa) 和刚度 (1.1129 MPa),适用于空间结构.
  • 验证了系统拆卸和重新配置的能力,展示了其动态适应性.

结论:

  • 机器人结构系统展示了可编程物质在创造适应性和高性能结构方面的潜力.
  • 简单的机器人,强大的设计和高质量特异性性能的结合使得各种应用程序的自主自我重新配置成为可能.
  • 该系统是实现自我重构的自主超材料的重要一步,以应对未来的技术挑战.