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Miniature High-force, Long-stroke Sma Linear Actuators:stroke Forces, Stroke Lengths, Cycle Speeds, And Structural Strengths Are Increased

机译:微型高力,长行程Sma线性执行器:行程力,行程长度,循环速度和结构强度增加

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摘要

Improved long-stroke shape-memory-alloy (SMA) linear actuators are being developed to exert significantly higher forces and operate at higher activation temperatures than do prior SMA actuators. In these actuators, long linear strokes are achieved through the principle of displacement multiplication, according to which there are multiple stages, each intermediate stage being connected by straight SMA wire segments to the next stage so that relative motions of stages are additive toward the final stage, which is the output stage.
机译:与以前的SMA致动器相比,正在开发改进的长冲程形状记忆合金(SMA)线性致动器,以施加更大的力并在更高的激活温度下工作。在这些执行器中,通过位移倍增原理实现了较长的线性行程,根据该原理,存在多个级,每个中间级通过直的SMA线段连接至下一级,从而各级的相对运动可向最终级累加,这是输出阶段。

著录项

  • 来源
    《NASA Tech Briefs》 |2008年第12期|p.48-49|共2页
  • 作者

    John H. Glenn;

  • 作者单位

    Research Center, Cleveland, Ohio;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 航空;
  • 关键词

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