形状记忆合金驱动器驱动方式研究

Study on the Driving Method of SMA Actuator

七文阐述了 Ｓ Ｍ Ａ 驱动器的驱动原理，分析了 Ｓ Ｍ Ａ 的性能和不同驱动方式对 Ｓ Ｍ Ａ 驱动器输出性能的影响。文章认为， Ｓ Ｍ Ａ 的相变温度范围越小，高低温时性能相差越大， Ｓ Ｍ Ａ 双程驱动器的输出性能越好；差动式 Ｓ Ｍ Ａ 双程驱动器与偏动式 Ｓ Ｍ Ａ 双程驱动器相比，前者更容易获得较大的输出力和输出位移，但后者较容易控制，响应速度较快。

In this paper,the driving principle of SMA(Shape Memory Alloy)actuator is dicussed,the effect of SMAs characteristics and different driving method on the output property of the SMA actuator is analyzed,The narrower the phase temerature range,and more difference between the property of austenite phase and martensitic phase,the better output property.As to differential SMA actuator and bias SMA actuator,the former apt to obtain grater output force and output displacement;the latter apt to be controlled and have a higher response speed.