Control Characteristics of Shape Memory Alloy Actuator Using Resistance Feedback Control Method
Control Characteristics of Shape Memory Alloy Actuator Using Resistance Feedback Control Method
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DOI：
10.4028/www.scientific.net/ast.59.178
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发表时间：
2008-09
期刊：
影响因子：
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通讯作者：
Y. Takeda;Hiroki Cho;Takaei Yamamoto;T. Sakuma;A. Suzuki
中科院分区：
文献类型：
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作者：
Y. Takeda;Hiroki Cho;Takaei Yamamoto;T. Sakuma;A. Suzuki
使用形状记忆合金的致动器可以作为致动器来控制或保持定位，而无需使用传感器设备。在这项工作中，产生了带有偏置机构的位置控制模型。制作的模型采用设定关断时间的方法，通过电阻反馈控制，可以在任意位置设定和保持。研究了输入电流、控制距离和关断时间对动态行为和位置稳定性等定位特性的影响。结果表明，用于加热的高输入电流可有效缩短上升时间和稳定时间。然而，过冲随着输入电流的增加而增加。当恢复应变低于2.5%时，上升和沉降速度随着控制距离的增加而增加。此外，关闭时间也会影响位置稳定性。在短关断时间的情况下，无论输入电流和控制距离的值如何，都可以实现良好的位置稳定性。
The actuators using shape memory alloys can work as an actuator to control or retain positioning without using sensor devices. In this work, a position control model with a biasing mechanism is produced. The produced model is controlled by resistance feedback using the method of setting off-time and can be set and retained at an arbitrary position. The effects of input current, control distance and off-time on positioning characteristics such as dynamic behavior and position stability are investigated. The results show that high input current for heating is effective for shortening the rise and settling times. However, the overshoot increases with increasing input current. When the recovery strain is below 2.5%, the rise and settling velocities increase with increasing control distance. Furthermore, the off-time affects position stability. In the case of short off-time, fine position stability is performed regardless of the values of input current and control distance.