用于微系统驱动的形状记忆合金弹簧特性实验研究

EXPERIMENTAL STUOIES ON THE CHARACTERISTICS OF SMA SPRING USED AS A ACTUATOR IN MICRO ELECTROMECHANICAL SYSTEM

研究了形状记忆合金（ＳＭＡ）用作微机械电子系统执行元件时的几个问题。在实验的基础上建立了实用化的ＳＭＡ热机转换模型。分析了影响其动作频率的主要因素并提出了改善频率特性的措施。利用几何敏感度的概念，对ＳＭＡ驱动性能受尺寸微型化的影响进行了探讨。

Some problems are studied about shape memory alloy (SMA) spring used as a actuator in micro electromechanical systems. The thermalmechanical conversion process of SMA spring is modelled based on experiments. The major factors that affect on the action frequence of SMA spring are analysed and a way of improving its frequence characteristic is presented. With the concept of dimension sensitivety, the effects of size minification on the driving characteristic of SMA spring are discussed.