491 resultados para SMA


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本文在一般地介绍了形状记忆合金(SMA)的工作原理、SMA驱动器类型、SMA驱动器控制的基础上.描述了我们自行研制的单自由度的SMA驱动机构和SMA比例控制器.该控制器不论对于指定路线的程序控制还是任意给定主从遥控都能很好地完成给定的作业任务.

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The aim of this paper is to increase the performance of hysteresis compensation for Shape Memory Alloy (SMA) actuators by using inverse Preisach model in closed — loop control system. This is used to reduce hysteresis effects and improve accuracy for the displacement of SMA actuators. Firstly, hysteresis is identified by numerical Preisach model implementation. The geometrical interpretation from first order transition curves is used for hysteresis modeling. Secondly, the inverse Preisach model is formulated and incorporated in closed-loop PID control system in order to obtain desired current-to-displacement relationship with hysteresis reducing. The experimental results for hysteresis compensation by using this method are also shown in this paper.

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UANL