An experimental study on precision positioning characteristics of shape memory alloy actuator

被引：8

作者：

Park, Sungwoo ^{[1
,2
]}

Hwang, Donghyun ^{[1
]}

机构：

[1] Korea Inst Sci & Technol, Ctr Intelligent & Interact Robot, Seoul 02792, South Korea

[2] Korea Univ, Dept Elect Engn, Seoul 02841, South Korea

来源：

MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS | 2020年 / 26卷 / 09期

关键词：

Microactuators - Proportional control systems - Shape-memory alloy - Controllers - Electric control equipment - Precision engineering - Three term control systems - Position control - Piezoelectric actuators;

D O I：

10.1007/s00542-020-04853-2

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We perform the experimental study on the precision positioning capability of SMA actuators, with the aim of evaluating practical applicability of the SMA actuator to the field of precision engineering. For the aim, we focus on assessing the positioning accuracy and the minimum step-size of the SMA actuator quantitatively. In the accuracy test measuring the positioning tracking error, the position generated by the SMA actuator is controlled with three different position-control schemes: position-control with (1) only hysteresis compensator, (2) only PID controller, and (3) with PID controller with hysteresis compensator. The experimental results indicate that the smallest positioning RMSE of 0.0081%, 0.0124%, and 1.1314% for the triangular, sinusoidal, and square reference input, respectively, can be achieved by applying the PID controller with hysteresis compensator. And, the minimum incremental and decremental step-size is observed as 8.2 mu m for the case that the full-stroke (FS) is about 6.4 mm (i.e., 0.13% FS).

引用

页码：2801 / 2807

页数：7