Reducing the Power Consumption of a Shape Memory Alloy Wire Actuator Drive by Numerical Analysis and Experiment
Reducing the Power Consumption of a Shape Memory Alloy Wire Actuator Drive by Numerical Analysis and Experiment
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DOI：
10.1109/tmech.2018.2836352
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发表时间：
2018-08
期刊：
影响因子：
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通讯作者：
A. Yamano;A. Shintani;Tomohiro Ito;C. Nakagawa
中科院分区：
文献类型：
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作者：
A. Yamano;A. Shintani;Tomohiro Ito;C. Nakagawa
由于这些致动器的高比功率、小尺寸和简单性，用于移动体的形状记忆合金（SMA）线致动器比其他常规致动器具有一些优点。然而，SMA线致动器的大功率消耗阻碍了其实际应用。本文介绍了如何优化SMA线驱动器的输入电压。首先，从测量数据创建数值致动器模型。接下来，输入电压波优化三个评价函数，使用多目标优化：最大输入电压，时间平均致动器的功耗，时间平均弯矩（致动器的输出）。获得的数值结果表明，高的最大输入电压可以实现SMA线致动器的高效驱动。我们还验证了消耗的功率，最大输入电压，从SMA线致动器的输出的多目标优化的一个条件下的权衡关系。实验数据也部分支持了多目标优化和数值模拟得到的折衷关系。
The use of shape memory alloy (SMA) wire actuators for a moving body has some advantages over other conventional actuators because of the high specific power, small size, and simplicity of these actuators. However, the large power consumption of SMA wire actuators prevents its practical use. This paper shows how to optimize the input voltage of SMA wire actuators. First, a numerical actuator model is created from the measured data. Next, input voltage waves are optimized for three evaluation functions using multiobjective optimization: maximum input voltage, time-averaged actuators power consumption, and time-averaged bending moment (the output of actuator). The obtained numerical results show that a high maximum input voltage achieves efficient drive of SMA wire actuators. We also verified the tradeoff relations of the consumed power, maximum input voltage, and output from the SMA wire actuator under one condition of the multiobjective optimization. Experimental data also partially supported the tradeoff relations obtained by the multiobjective optimization and the numerical simulation.